❓ Mr Masters asks about the research underpinning the conservation value assessment of wetlands on the Swan Coastal Plain. The answer details the classification system, the organisations involved in the assessment, and the reports available for public consultation.
AnsweredQoN 1320Legislative Assembly
QuestionView source ↗
(1) What research has been carried out, and by whom, to show that 15% of wetlands remaining on the Swan Coastal Plain have a high conservation value and that a further 10% have a moderate conservation value?
(2) What written reports and maps of this research are available for public consultation?
(2) What written reports and maps of this research are available for public consultation?
AnswerView source ↗
Answered
19 February 2002
Responded by
Minister for the Environment and Heritage
Response time
77 days
Conservation category wetlands (CCWs) are the highest priority wetlands and support a high level of ecological attributes and functions. The objective is preservation of wetland attributes and functions through various mechanisms including: reservation in national parks, crown reserves and State owned land; protection under Environmental Protection Policies; and wetland covenanting by landowners. Resource enhancement wetlands may have been partially modified but still support substantial ecological attributes and functions. The objective is for management, restoration and protection towards improving their conservation value. These wetlands have the potential to be restored to conservation category. Multiple use wetlands have few remaining important ecological attributes and functions. However, they should be considered in strategic planning (e.g. drainage, town/land use planning) and can form part of a stormwater management system in urban areas. The Commission regards CCWs as the most valuable group of wetlands. Only 15% of wetlands on the Swan Coastal Plain are still considered to be CCWs and 6% are considered resource enhancement wetlands. The Environmental Protection Authority, the Western Australian Planning Commission, Conservation Council and the Water and Rivers Commission Board have recognised CCWs as valuable wetlands as outlined in the Wetlands Conservation Policy for Western Australia 1997. Wetlands of the Swan Coastal Plain Vols. 2A and 2B 1996 (the 'Atlas') is the culmination of data gathered from 1986 to 1995 from a variety of sources: Environmental Protection Authority, West Australian Water Authority, West Australian Water Resources Council, Murdoch University students, consultants V&C Semeniuk Research Group, Joan Payne, Jan Rodda and Gary Middle. For wetlands described from the Wedge Island to Mandurah area, a two-tiered approach was used and for wetlands from Mandurah to Busselton only first tier evaluation was undertaken. The first tier evaluation recognises existing expert evaluations at the international, national and regional levels. The second tier consists of preliminary assessments based upon rapid survey and evaluation methodology. Wetlands meeting the criteria through the first tier assessment are automatically considered to be CCWs. International recognition – these are wetlands nominated by Australia for inclusion on the List of Wetlands of International Importance under the Ramsar Convention 1971; National recognition – some Swan Coastal Plain wetlands have recognition in the Australia Nature Conservation Authority's 1993 Directory of Important Wetlands in Australia and on the Australian Heritage Commission's Register of the National Estate . The Directory was updated in 2001 by Environment Australia; and Regional recognition – captures wetlands with recreational use, educational use, environmental, Aboriginal or historical significance. The studies identifying wetlands with regional significance are: a) Conservation Through Reserves - System 6 – identifies opportunities for setting aside areas of land in the most intensively used part of WA, for the purposes of conservation of natural areas and recreation in natural surroundings. The reserves represent the major communities of natural wildlife or flora types in WA. b) Report on an Investigation into Scientific and Educational Values of Wetlands and Rivers in the Perth-Bunbury Region –the objective of this study was to assess the environmental and recreational significance of rivers and wetlands to facilitate the responsible planning and allocation of water resources in the Perth to Bunbury region. c) A Systematic Overview of Environmental Values of the Wetlands, Rivers and Estuaries of the Busselton-Walpole Region – provides a systematic overview of the environmental values of the wetlands, rivers and estuaries of the Busselton to Walpole Region. It also identifies many of the important and valuable wetlands that warrant planning and management protection. Wetlands that have not been identified through the above processes can be assigned a category through second tier assessment methods. In most cases such wetlands are not considered to be CCWs. Second tier assessment methods are: EPA Bulletin Methods 227, 374 and 686; wetlands scored on selected natural attributes and human use criteria. It should be noted that if a wetland contains rare flora or fauna, the wetland is automatically assigned conservation category status; direct assessment of wetland vegetation status (through photographs, maps {topographic and geological}, research and site visits); and assessment made of the 'naturalness' using an estimate from aerial photos of the percentage of the wetland which is native vegetation and undisturbed. Since the Atlas was published in 1996, there have been several verifications of the environmental values of the CCWs in the Perth Metropolitan area and evaluations undertaken south of Mandurah: 1997 - for the release of draft Perth's Bushplan, the V & C Semeniuk Research Group undertook a verification of all the CCWs outside those that were proposed for inclusion in Bush Forever, Lakes EPP and reserves and some other areas of crown land in the Perth Metropolitan area. Aerial photography was used which was backed up with site visits. The confirmed CCWs were included in the draft Perth's Bushplan mapping (which identifies CCWs both within and outside Bush Forever sites); 1998 – for wetlands south of Mandurah, the V&C Semeniuk Research Group was hired to undertake an evaluation of all the wetlands between Mandurah and Dunsborough. The methodology used was the evaluation designed by the Semeniuk Research Group designed to specifically represent and capture the diversity of wetlands in the area. The assessment is based upon the following six criteria: a) Representativeness of a wetland type; b) Unaltered, unusual or representative wetland processes; c) Habitats for rare or endangered fauna or diversity of habitat; d) Wetland functions including maintaining large faunal populations, being a refuge or important for migratory populations or being significant hydrologically; e) Biodiversity including unaltered vegetation and fauna, scarce or diverse vegetation or fauna; and f) Scientific value including unusual geomorphology or sediments and significant pollen records. A wetland is categorised as a CCW if it meets one of the above criteria. 1999: The Water and Rivers Commission hired Alan Tingay and Associates to conduct a 'risk assessment' study on the 521 CCWs that were not currently protected. The aim was to identify how many of the 521 CCWs were at risk of no longer being a CCW. This could be due to clearing or development of the wetland or suspected impacts of surrounding landuses. 2000 - the Commission undertook verification of CCWs for the release of Perth's Bush Forever (formerly Perth's Bushplan). The Commission hired environmental consultants Ecologia and ATA Environmental to carry out evaluations using the EPA's Bulletin 686 for the risk sites identified by Alan Tingay and Associates in 1999. Verification by the Commission also included another aerial photography assessment of all CCWs in the metropolitan area. Site visits and site reports from the Bushplan team that had been conducted on wetlands were also included. (2) Wetlands of the Swan Coastal Plain volumes are available at offices of the Commission, local government and libraries. Maps in Perth's Bush Forever identify CCW's in the Perth Metropolitan area and copies are available from the Department for Planning and Infrastructure, local government and libraries. The Commission has a Wetland Mapping Database, which is available digitally by request from the Commission at Head Office in East Perth. Copies of the First Tier reports can be viewed at the Commission's Head Office in East Perth. It is anticipated that all other reports mentioned above will be published in the future.
Multiple use wetlands have few remaining important ecological attributes and functions. However, they should be considered in strategic planning (e.g. drainage, town/land use planning) and can form part of a stormwater management system in urban areas. The Commission regards CCWs as the most valuable group of wetlands. Only 15% of wetlands on the Swan Coastal Plain are still considered to be CCWs and 6% are considered resource enhancement wetlands. The Environmental Protection Authority, the Western Australian Planning Commission, Conservation Council and the Water and Rivers Commission Board have recognised CCWs as valuable wetlands as outlined in the Wetlands Conservation Policy for Western Australia 1997. Wetlands of the Swan Coastal Plain Vols. 2A and 2B 1996 (the 'Atlas') is the culmination of data gathered from 1986 to 1995 from a variety of sources: Environmental Protection Authority, West Australian Water Authority, West Australian Water Resources Council, Murdoch University students, consultants V&C Semeniuk Research Group, Joan Payne, Jan Rodda and Gary Middle. For wetlands described from the Wedge Island to Mandurah area, a two-tiered approach was used and for wetlands from Mandurah to Busselton only first tier evaluation was undertaken. The first tier evaluation recognises existing expert evaluations at the international, national and regional levels. The second tier consists of preliminary assessments based upon rapid survey and evaluation methodology. Wetlands meeting the criteria through the first tier assessment are automatically considered to be CCWs. International recognition – these are wetlands nominated by Australia for inclusion on the List of Wetlands of International Importance under the Ramsar Convention 1971; National recognition – some Swan Coastal Plain wetlands have recognition in the Australia Nature Conservation Authority's 1993 Directory of Important Wetlands in Australia and on the Australian Heritage Commission's Register of the National Estate . The Directory was updated in 2001 by Environment Australia; and Regional recognition – captures wetlands with recreational use, educational use, environmental, Aboriginal or historical significance. The studies identifying wetlands with regional significance are: a) Conservation Through Reserves - System 6 – identifies opportunities for setting aside areas of land in the most intensively used part of WA, for the purposes of conservation of natural areas and recreation in natural surroundings. The reserves represent the major communities of natural wildlife or flora types in WA. b) Report on an Investigation into Scientific and Educational Values of Wetlands and Rivers in the Perth-Bunbury Region –the objective of this study was to assess the environmental and recreational significance of rivers and wetlands to facilitate the responsible planning and allocation of water resources in the Perth to Bunbury region. c) A Systematic Overview of Environmental Values of the Wetlands, Rivers and Estuaries of the Busselton-Walpole Region – provides a systematic overview of the environmental values of the wetlands, rivers and estuaries of the Busselton to Walpole Region. It also identifies many of the important and valuable wetlands that warrant planning and management protection. Wetlands that have not been identified through the above processes can be assigned a category through second tier assessment methods. In most cases such wetlands are not considered to be CCWs. Second tier assessment methods are: EPA Bulletin Methods 227, 374 and 686; wetlands scored on selected natural attributes and human use criteria. It should be noted that if a wetland contains rare flora or fauna, the wetland is automatically assigned conservation category status; direct assessment of wetland vegetation status (through photographs, maps {topographic and geological}, research and site visits); and assessment made of the 'naturalness' using an estimate from aerial photos of the percentage of the wetland which is native vegetation and undisturbed. Since the Atlas was published in 1996, there have been several verifications of the environmental values of the CCWs in the Perth Metropolitan area and evaluations undertaken south of Mandurah: 1997 - for the release of draft Perth's Bushplan, the V & C Semeniuk Research Group undertook a verification of all the CCWs outside those that were proposed for inclusion in Bush Forever, Lakes EPP and reserves and some other areas of crown land in the Perth Metropolitan area. Aerial photography was used which was backed up with site visits. The confirmed CCWs were included in the draft Perth's Bushplan mapping (which identifies CCWs both within and outside Bush Forever sites); 1998 – for wetlands south of Mandurah, the V&C Semeniuk Research Group was hired to undertake an evaluation of all the wetlands between Mandurah and Dunsborough. The methodology used was the evaluation designed by the Semeniuk Research Group designed to specifically represent and capture the diversity of wetlands in the area. The assessment is based upon the following six criteria: a) Representativeness of a wetland type; b) Unaltered, unusual or representative wetland processes; c) Habitats for rare or endangered fauna or diversity of habitat; d) Wetland functions including maintaining large faunal populations, being a refuge or important for migratory populations or being significant hydrologically; e) Biodiversity including unaltered vegetation and fauna, scarce or diverse vegetation or fauna; and f) Scientific value including unusual geomorphology or sediments and significant pollen records. A wetland is categorised as a CCW if it meets one of the above criteria. 1999: The Water and Rivers Commission hired Alan Tingay and Associates to conduct a 'risk assessment' study on the 521 CCWs that were not currently protected. The aim was to identify how many of the 521 CCWs were at risk of no longer being a CCW. This could be due to clearing or development of the wetland or suspected impacts of surrounding landuses. 2000 - the Commission undertook verification of CCWs for the release of Perth's Bush Forever (formerly Perth's Bushplan). The Commission hired environmental consultants Ecologia and ATA Environmental to carry out evaluations using the EPA's Bulletin 686 for the risk sites identified by Alan Tingay and Associates in 1999. Verification by the Commission also included another aerial photography assessment of all CCWs in the metropolitan area. Site visits and site reports from the Bushplan team that had been conducted on wetlands were also included. (2) Wetlands of the Swan Coastal Plain volumes are available at offices of the Commission, local government and libraries. Maps in Perth's Bush Forever identify CCW's in the Perth Metropolitan area and copies are available from the Department for Planning and Infrastructure, local government and libraries. The Commission has a Wetland Mapping Database, which is available digitally by request from the Commission at Head Office in East Perth. Copies of the First Tier reports can be viewed at the Commission's Head Office in East Perth. It is anticipated that all other reports mentioned above will be published in the future.
The Commission regards CCWs as the most valuable group of wetlands. Only 15% of wetlands on the Swan Coastal Plain are still considered to be CCWs and 6% are considered resource enhancement wetlands. The Environmental Protection Authority, the Western Australian Planning Commission, Conservation Council and the Water and Rivers Commission Board have recognised CCWs as valuable wetlands as outlined in the Wetlands Conservation Policy for Western Australia 1997. Wetlands of the Swan Coastal Plain Vols. 2A and 2B 1996 (the 'Atlas') is the culmination of data gathered from 1986 to 1995 from a variety of sources: Environmental Protection Authority, West Australian Water Authority, West Australian Water Resources Council, Murdoch University students, consultants V&C Semeniuk Research Group, Joan Payne, Jan Rodda and Gary Middle. For wetlands described from the Wedge Island to Mandurah area, a two-tiered approach was used and for wetlands from Mandurah to Busselton only first tier evaluation was undertaken. The first tier evaluation recognises existing expert evaluations at the international, national and regional levels. The second tier consists of preliminary assessments based upon rapid survey and evaluation methodology. Wetlands meeting the criteria through the first tier assessment are automatically considered to be CCWs. International recognition – these are wetlands nominated by Australia for inclusion on the List of Wetlands of International Importance under the Ramsar Convention 1971; National recognition – some Swan Coastal Plain wetlands have recognition in the Australia Nature Conservation Authority's 1993 Directory of Important Wetlands in Australia and on the Australian Heritage Commission's Register of the National Estate . The Directory was updated in 2001 by Environment Australia; and Regional recognition – captures wetlands with recreational use, educational use, environmental, Aboriginal or historical significance. The studies identifying wetlands with regional significance are: a) Conservation Through Reserves - System 6 – identifies opportunities for setting aside areas of land in the most intensively used part of WA, for the purposes of conservation of natural areas and recreation in natural surroundings. The reserves represent the major communities of natural wildlife or flora types in WA. b) Report on an Investigation into Scientific and Educational Values of Wetlands and Rivers in the Perth-Bunbury Region –the objective of this study was to assess the environmental and recreational significance of rivers and wetlands to facilitate the responsible planning and allocation of water resources in the Perth to Bunbury region. c) A Systematic Overview of Environmental Values of the Wetlands, Rivers and Estuaries of the Busselton-Walpole Region – provides a systematic overview of the environmental values of the wetlands, rivers and estuaries of the Busselton to Walpole Region. It also identifies many of the important and valuable wetlands that warrant planning and management protection. Wetlands that have not been identified through the above processes can be assigned a category through second tier assessment methods. In most cases such wetlands are not considered to be CCWs. Second tier assessment methods are: EPA Bulletin Methods 227, 374 and 686; wetlands scored on selected natural attributes and human use criteria. It should be noted that if a wetland contains rare flora or fauna, the wetland is automatically assigned conservation category status; direct assessment of wetland vegetation status (through photographs, maps {topographic and geological}, research and site visits); and assessment made of the 'naturalness' using an estimate from aerial photos of the percentage of the wetland which is native vegetation and undisturbed. Since the Atlas was published in 1996, there have been several verifications of the environmental values of the CCWs in the Perth Metropolitan area and evaluations undertaken south of Mandurah: 1997 - for the release of draft Perth's Bushplan, the V & C Semeniuk Research Group undertook a verification of all the CCWs outside those that were proposed for inclusion in Bush Forever, Lakes EPP and reserves and some other areas of crown land in the Perth Metropolitan area. Aerial photography was used which was backed up with site visits. The confirmed CCWs were included in the draft Perth's Bushplan mapping (which identifies CCWs both within and outside Bush Forever sites); 1998 – for wetlands south of Mandurah, the V&C Semeniuk Research Group was hired to undertake an evaluation of all the wetlands between Mandurah and Dunsborough. The methodology used was the evaluation designed by the Semeniuk Research Group designed to specifically represent and capture the diversity of wetlands in the area. The assessment is based upon the following six criteria: a) Representativeness of a wetland type; b) Unaltered, unusual or representative wetland processes; c) Habitats for rare or endangered fauna or diversity of habitat; d) Wetland functions including maintaining large faunal populations, being a refuge or important for migratory populations or being significant hydrologically; e) Biodiversity including unaltered vegetation and fauna, scarce or diverse vegetation or fauna; and f) Scientific value including unusual geomorphology or sediments and significant pollen records. A wetland is categorised as a CCW if it meets one of the above criteria. 1999: The Water and Rivers Commission hired Alan Tingay and Associates to conduct a 'risk assessment' study on the 521 CCWs that were not currently protected. The aim was to identify how many of the 521 CCWs were at risk of no longer being a CCW. This could be due to clearing or development of the wetland or suspected impacts of surrounding landuses. 2000 - the Commission undertook verification of CCWs for the release of Perth's Bush Forever (formerly Perth's Bushplan). The Commission hired environmental consultants Ecologia and ATA Environmental to carry out evaluations using the EPA's Bulletin 686 for the risk sites identified by Alan Tingay and Associates in 1999. Verification by the Commission also included another aerial photography assessment of all CCWs in the metropolitan area. Site visits and site reports from the Bushplan team that had been conducted on wetlands were also included. (2) Wetlands of the Swan Coastal Plain volumes are available at offices of the Commission, local government and libraries. Maps in Perth's Bush Forever identify CCW's in the Perth Metropolitan area and copies are available from the Department for Planning and Infrastructure, local government and libraries. The Commission has a Wetland Mapping Database, which is available digitally by request from the Commission at Head Office in East Perth. Copies of the First Tier reports can be viewed at the Commission's Head Office in East Perth. It is anticipated that all other reports mentioned above will be published in the future.
Wetlands meeting the criteria through the first tier assessment are automatically considered to be CCWs. International recognition – these are wetlands nominated by Australia for inclusion on the List of Wetlands of International Importance under the Ramsar Convention 1971; National recognition – some Swan Coastal Plain wetlands have recognition in the Australia Nature Conservation Authority's 1993 Directory of Important Wetlands in Australia and on the Australian Heritage Commission's Register of the National Estate . The Directory was updated in 2001 by Environment Australia; and Regional recognition – captures wetlands with recreational use, educational use, environmental, Aboriginal or historical significance. The studies identifying wetlands with regional significance are: a) Conservation Through Reserves - System 6 – identifies opportunities for setting aside areas of land in the most intensively used part of WA, for the purposes of conservation of natural areas and recreation in natural surroundings. The reserves represent the major communities of natural wildlife or flora types in WA. b) Report on an Investigation into Scientific and Educational Values of Wetlands and Rivers in the Perth-Bunbury Region –the objective of this study was to assess the environmental and recreational significance of rivers and wetlands to facilitate the responsible planning and allocation of water resources in the Perth to Bunbury region. c) A Systematic Overview of Environmental Values of the Wetlands, Rivers and Estuaries of the Busselton-Walpole Region – provides a systematic overview of the environmental values of the wetlands, rivers and estuaries of the Busselton to Walpole Region. It also identifies many of the important and valuable wetlands that warrant planning and management protection. Wetlands that have not been identified through the above processes can be assigned a category through second tier assessment methods. In most cases such wetlands are not considered to be CCWs. Second tier assessment methods are: EPA Bulletin Methods 227, 374 and 686; wetlands scored on selected natural attributes and human use criteria. It should be noted that if a wetland contains rare flora or fauna, the wetland is automatically assigned conservation category status; direct assessment of wetland vegetation status (through photographs, maps {topographic and geological}, research and site visits); and assessment made of the 'naturalness' using an estimate from aerial photos of the percentage of the wetland which is native vegetation and undisturbed. Since the Atlas was published in 1996, there have been several verifications of the environmental values of the CCWs in the Perth Metropolitan area and evaluations undertaken south of Mandurah: 1997 - for the release of draft Perth's Bushplan, the V & C Semeniuk Research Group undertook a verification of all the CCWs outside those that were proposed for inclusion in Bush Forever, Lakes EPP and reserves and some other areas of crown land in the Perth Metropolitan area. Aerial photography was used which was backed up with site visits. The confirmed CCWs were included in the draft Perth's Bushplan mapping (which identifies CCWs both within and outside Bush Forever sites); 1998 – for wetlands south of Mandurah, the V&C Semeniuk Research Group was hired to undertake an evaluation of all the wetlands between Mandurah and Dunsborough. The methodology used was the evaluation designed by the Semeniuk Research Group designed to specifically represent and capture the diversity of wetlands in the area. The assessment is based upon the following six criteria: a) Representativeness of a wetland type; b) Unaltered, unusual or representative wetland processes; c) Habitats for rare or endangered fauna or diversity of habitat; d) Wetland functions including maintaining large faunal populations, being a refuge or important for migratory populations or being significant hydrologically; e) Biodiversity including unaltered vegetation and fauna, scarce or diverse vegetation or fauna; and f) Scientific value including unusual geomorphology or sediments and significant pollen records. A wetland is categorised as a CCW if it meets one of the above criteria. 1999: The Water and Rivers Commission hired Alan Tingay and Associates to conduct a 'risk assessment' study on the 521 CCWs that were not currently protected. The aim was to identify how many of the 521 CCWs were at risk of no longer being a CCW. This could be due to clearing or development of the wetland or suspected impacts of surrounding landuses. 2000 - the Commission undertook verification of CCWs for the release of Perth's Bush Forever (formerly Perth's Bushplan). The Commission hired environmental consultants Ecologia and ATA Environmental to carry out evaluations using the EPA's Bulletin 686 for the risk sites identified by Alan Tingay and Associates in 1999. Verification by the Commission also included another aerial photography assessment of all CCWs in the metropolitan area. Site visits and site reports from the Bushplan team that had been conducted on wetlands were also included. (2) Wetlands of the Swan Coastal Plain volumes are available at offices of the Commission, local government and libraries. Maps in Perth's Bush Forever identify CCW's in the Perth Metropolitan area and copies are available from the Department for Planning and Infrastructure, local government and libraries. The Commission has a Wetland Mapping Database, which is available digitally by request from the Commission at Head Office in East Perth. Copies of the First Tier reports can be viewed at the Commission's Head Office in East Perth. It is anticipated that all other reports mentioned above will be published in the future.
b) Report on an Investigation into Scientific and Educational Values of Wetlands and Rivers in the Perth-Bunbury Region –the objective of this study was to assess the environmental and recreational significance of rivers and wetlands to facilitate the responsible planning and allocation of water resources in the Perth to Bunbury region. c) A Systematic Overview of Environmental Values of the Wetlands, Rivers and Estuaries of the Busselton-Walpole Region – provides a systematic overview of the environmental values of the wetlands, rivers and estuaries of the Busselton to Walpole Region. It also identifies many of the important and valuable wetlands that warrant planning and management protection.
c) A Systematic Overview of Environmental Values of the Wetlands, Rivers and Estuaries of the Busselton-Walpole Region – provides a systematic overview of the environmental values of the wetlands, rivers and estuaries of the Busselton to Walpole Region. It also identifies many of the important and valuable wetlands that warrant planning and management protection.
b) Unaltered, unusual or representative wetland processes; c) Habitats for rare or endangered fauna or diversity of habitat; d) Wetland functions including maintaining large faunal populations, being a refuge or important for migratory populations or being significant hydrologically; e) Biodiversity including unaltered vegetation and fauna, scarce or diverse vegetation or fauna; and f) Scientific value including unusual geomorphology or sediments and significant pollen records. A wetland is categorised as a CCW if it meets one of the above criteria. 1999: The Water and Rivers Commission hired Alan Tingay and Associates to conduct a 'risk assessment' study on the 521 CCWs that were not currently protected. The aim was to identify how many of the 521 CCWs were at risk of no longer being a CCW. This could be due to clearing or development of the wetland or suspected impacts of surrounding landuses. 2000 - the Commission undertook verification of CCWs for the release of Perth's Bush Forever (formerly Perth's Bushplan). The Commission hired environmental consultants Ecologia and ATA Environmental to carry out evaluations using the EPA's Bulletin 686 for the risk sites identified by Alan Tingay and Associates in 1999. Verification by the Commission also included another aerial photography assessment of all CCWs in the metropolitan area. Site visits and site reports from the Bushplan team that had been conducted on wetlands were also included.
c) Habitats for rare or endangered fauna or diversity of habitat; d) Wetland functions including maintaining large faunal populations, being a refuge or important for migratory populations or being significant hydrologically; e) Biodiversity including unaltered vegetation and fauna, scarce or diverse vegetation or fauna; and f) Scientific value including unusual geomorphology or sediments and significant pollen records. A wetland is categorised as a CCW if it meets one of the above criteria. 1999: The Water and Rivers Commission hired Alan Tingay and Associates to conduct a 'risk assessment' study on the 521 CCWs that were not currently protected. The aim was to identify how many of the 521 CCWs were at risk of no longer being a CCW. This could be due to clearing or development of the wetland or suspected impacts of surrounding landuses. 2000 - the Commission undertook verification of CCWs for the release of Perth's Bush Forever (formerly Perth's Bushplan). The Commission hired environmental consultants Ecologia and ATA Environmental to carry out evaluations using the EPA's Bulletin 686 for the risk sites identified by Alan Tingay and Associates in 1999. Verification by the Commission also included another aerial photography assessment of all CCWs in the metropolitan area. Site visits and site reports from the Bushplan team that had been conducted on wetlands were also included.
d) Wetland functions including maintaining large faunal populations, being a refuge or important for migratory populations or being significant hydrologically; e) Biodiversity including unaltered vegetation and fauna, scarce or diverse vegetation or fauna; and f) Scientific value including unusual geomorphology or sediments and significant pollen records. A wetland is categorised as a CCW if it meets one of the above criteria. 1999: The Water and Rivers Commission hired Alan Tingay and Associates to conduct a 'risk assessment' study on the 521 CCWs that were not currently protected. The aim was to identify how many of the 521 CCWs were at risk of no longer being a CCW. This could be due to clearing or development of the wetland or suspected impacts of surrounding landuses. 2000 - the Commission undertook verification of CCWs for the release of Perth's Bush Forever (formerly Perth's Bushplan). The Commission hired environmental consultants Ecologia and ATA Environmental to carry out evaluations using the EPA's Bulletin 686 for the risk sites identified by Alan Tingay and Associates in 1999. Verification by the Commission also included another aerial photography assessment of all CCWs in the metropolitan area. Site visits and site reports from the Bushplan team that had been conducted on wetlands were also included.
e) Biodiversity including unaltered vegetation and fauna, scarce or diverse vegetation or fauna; and f) Scientific value including unusual geomorphology or sediments and significant pollen records. A wetland is categorised as a CCW if it meets one of the above criteria. 1999: The Water and Rivers Commission hired Alan Tingay and Associates to conduct a 'risk assessment' study on the 521 CCWs that were not currently protected. The aim was to identify how many of the 521 CCWs were at risk of no longer being a CCW. This could be due to clearing or development of the wetland or suspected impacts of surrounding landuses. 2000 - the Commission undertook verification of CCWs for the release of Perth's Bush Forever (formerly Perth's Bushplan). The Commission hired environmental consultants Ecologia and ATA Environmental to carry out evaluations using the EPA's Bulletin 686 for the risk sites identified by Alan Tingay and Associates in 1999. Verification by the Commission also included another aerial photography assessment of all CCWs in the metropolitan area. Site visits and site reports from the Bushplan team that had been conducted on wetlands were also included.
f) Scientific value including unusual geomorphology or sediments and significant pollen records. A wetland is categorised as a CCW if it meets one of the above criteria. 1999: The Water and Rivers Commission hired Alan Tingay and Associates to conduct a 'risk assessment' study on the 521 CCWs that were not currently protected. The aim was to identify how many of the 521 CCWs were at risk of no longer being a CCW. This could be due to clearing or development of the wetland or suspected impacts of surrounding landuses. 2000 - the Commission undertook verification of CCWs for the release of Perth's Bush Forever (formerly Perth's Bushplan). The Commission hired environmental consultants Ecologia and ATA Environmental to carry out evaluations using the EPA's Bulletin 686 for the risk sites identified by Alan Tingay and Associates in 1999. Verification by the Commission also included another aerial photography assessment of all CCWs in the metropolitan area. Site visits and site reports from the Bushplan team that had been conducted on wetlands were also included.
A wetland is categorised as a CCW if it meets one of the above criteria. 1999: The Water and Rivers Commission hired Alan Tingay and Associates to conduct a 'risk assessment' study on the 521 CCWs that were not currently protected. The aim was to identify how many of the 521 CCWs were at risk of no longer being a CCW. This could be due to clearing or development of the wetland or suspected impacts of surrounding landuses. 2000 - the Commission undertook verification of CCWs for the release of Perth's Bush Forever (formerly Perth's Bushplan). The Commission hired environmental consultants Ecologia and ATA Environmental to carry out evaluations using the EPA's Bulletin 686 for the risk sites identified by Alan Tingay and Associates in 1999. Verification by the Commission also included another aerial photography assessment of all CCWs in the metropolitan area. Site visits and site reports from the Bushplan team that had been conducted on wetlands were also included.
Multiple use wetlands have few remaining important ecological attributes and functions. However, they should be considered in strategic planning (e.g. drainage, town/land use planning) and can form part of a stormwater management system in urban areas. The Commission regards CCWs as the most valuable group of wetlands. Only 15% of wetlands on the Swan Coastal Plain are still considered to be CCWs and 6% are considered resource enhancement wetlands. The Environmental Protection Authority, the Western Australian Planning Commission, Conservation Council and the Water and Rivers Commission Board have recognised CCWs as valuable wetlands as outlined in the Wetlands Conservation Policy for Western Australia 1997. Wetlands of the Swan Coastal Plain Vols. 2A and 2B 1996 (the 'Atlas') is the culmination of data gathered from 1986 to 1995 from a variety of sources: Environmental Protection Authority, West Australian Water Authority, West Australian Water Resources Council, Murdoch University students, consultants V&C Semeniuk Research Group, Joan Payne, Jan Rodda and Gary Middle. For wetlands described from the Wedge Island to Mandurah area, a two-tiered approach was used and for wetlands from Mandurah to Busselton only first tier evaluation was undertaken. The first tier evaluation recognises existing expert evaluations at the international, national and regional levels. The second tier consists of preliminary assessments based upon rapid survey and evaluation methodology. Wetlands meeting the criteria through the first tier assessment are automatically considered to be CCWs. International recognition – these are wetlands nominated by Australia for inclusion on the List of Wetlands of International Importance under the Ramsar Convention 1971; National recognition – some Swan Coastal Plain wetlands have recognition in the Australia Nature Conservation Authority's 1993 Directory of Important Wetlands in Australia and on the Australian Heritage Commission's Register of the National Estate . The Directory was updated in 2001 by Environment Australia; and Regional recognition – captures wetlands with recreational use, educational use, environmental, Aboriginal or historical significance. The studies identifying wetlands with regional significance are: a) Conservation Through Reserves - System 6 – identifies opportunities for setting aside areas of land in the most intensively used part of WA, for the purposes of conservation of natural areas and recreation in natural surroundings. The reserves represent the major communities of natural wildlife or flora types in WA. b) Report on an Investigation into Scientific and Educational Values of Wetlands and Rivers in the Perth-Bunbury Region –the objective of this study was to assess the environmental and recreational significance of rivers and wetlands to facilitate the responsible planning and allocation of water resources in the Perth to Bunbury region. c) A Systematic Overview of Environmental Values of the Wetlands, Rivers and Estuaries of the Busselton-Walpole Region – provides a systematic overview of the environmental values of the wetlands, rivers and estuaries of the Busselton to Walpole Region. It also identifies many of the important and valuable wetlands that warrant planning and management protection. Wetlands that have not been identified through the above processes can be assigned a category through second tier assessment methods. In most cases such wetlands are not considered to be CCWs. Second tier assessment methods are: EPA Bulletin Methods 227, 374 and 686; wetlands scored on selected natural attributes and human use criteria. It should be noted that if a wetland contains rare flora or fauna, the wetland is automatically assigned conservation category status; direct assessment of wetland vegetation status (through photographs, maps {topographic and geological}, research and site visits); and assessment made of the 'naturalness' using an estimate from aerial photos of the percentage of the wetland which is native vegetation and undisturbed. Since the Atlas was published in 1996, there have been several verifications of the environmental values of the CCWs in the Perth Metropolitan area and evaluations undertaken south of Mandurah: 1997 - for the release of draft Perth's Bushplan, the V & C Semeniuk Research Group undertook a verification of all the CCWs outside those that were proposed for inclusion in Bush Forever, Lakes EPP and reserves and some other areas of crown land in the Perth Metropolitan area. Aerial photography was used which was backed up with site visits. The confirmed CCWs were included in the draft Perth's Bushplan mapping (which identifies CCWs both within and outside Bush Forever sites); 1998 – for wetlands south of Mandurah, the V&C Semeniuk Research Group was hired to undertake an evaluation of all the wetlands between Mandurah and Dunsborough. The methodology used was the evaluation designed by the Semeniuk Research Group designed to specifically represent and capture the diversity of wetlands in the area. The assessment is based upon the following six criteria: a) Representativeness of a wetland type; b) Unaltered, unusual or representative wetland processes; c) Habitats for rare or endangered fauna or diversity of habitat; d) Wetland functions including maintaining large faunal populations, being a refuge or important for migratory populations or being significant hydrologically; e) Biodiversity including unaltered vegetation and fauna, scarce or diverse vegetation or fauna; and f) Scientific value including unusual geomorphology or sediments and significant pollen records. A wetland is categorised as a CCW if it meets one of the above criteria. 1999: The Water and Rivers Commission hired Alan Tingay and Associates to conduct a 'risk assessment' study on the 521 CCWs that were not currently protected. The aim was to identify how many of the 521 CCWs were at risk of no longer being a CCW. This could be due to clearing or development of the wetland or suspected impacts of surrounding landuses. 2000 - the Commission undertook verification of CCWs for the release of Perth's Bush Forever (formerly Perth's Bushplan). The Commission hired environmental consultants Ecologia and ATA Environmental to carry out evaluations using the EPA's Bulletin 686 for the risk sites identified by Alan Tingay and Associates in 1999. Verification by the Commission also included another aerial photography assessment of all CCWs in the metropolitan area. Site visits and site reports from the Bushplan team that had been conducted on wetlands were also included. (2) Wetlands of the Swan Coastal Plain volumes are available at offices of the Commission, local government and libraries. Maps in Perth's Bush Forever identify CCW's in the Perth Metropolitan area and copies are available from the Department for Planning and Infrastructure, local government and libraries. The Commission has a Wetland Mapping Database, which is available digitally by request from the Commission at Head Office in East Perth. Copies of the First Tier reports can be viewed at the Commission's Head Office in East Perth. It is anticipated that all other reports mentioned above will be published in the future.
The Commission regards CCWs as the most valuable group of wetlands. Only 15% of wetlands on the Swan Coastal Plain are still considered to be CCWs and 6% are considered resource enhancement wetlands. The Environmental Protection Authority, the Western Australian Planning Commission, Conservation Council and the Water and Rivers Commission Board have recognised CCWs as valuable wetlands as outlined in the Wetlands Conservation Policy for Western Australia 1997. Wetlands of the Swan Coastal Plain Vols. 2A and 2B 1996 (the 'Atlas') is the culmination of data gathered from 1986 to 1995 from a variety of sources: Environmental Protection Authority, West Australian Water Authority, West Australian Water Resources Council, Murdoch University students, consultants V&C Semeniuk Research Group, Joan Payne, Jan Rodda and Gary Middle. For wetlands described from the Wedge Island to Mandurah area, a two-tiered approach was used and for wetlands from Mandurah to Busselton only first tier evaluation was undertaken. The first tier evaluation recognises existing expert evaluations at the international, national and regional levels. The second tier consists of preliminary assessments based upon rapid survey and evaluation methodology. Wetlands meeting the criteria through the first tier assessment are automatically considered to be CCWs. International recognition – these are wetlands nominated by Australia for inclusion on the List of Wetlands of International Importance under the Ramsar Convention 1971; National recognition – some Swan Coastal Plain wetlands have recognition in the Australia Nature Conservation Authority's 1993 Directory of Important Wetlands in Australia and on the Australian Heritage Commission's Register of the National Estate . The Directory was updated in 2001 by Environment Australia; and Regional recognition – captures wetlands with recreational use, educational use, environmental, Aboriginal or historical significance. The studies identifying wetlands with regional significance are: a) Conservation Through Reserves - System 6 – identifies opportunities for setting aside areas of land in the most intensively used part of WA, for the purposes of conservation of natural areas and recreation in natural surroundings. The reserves represent the major communities of natural wildlife or flora types in WA. b) Report on an Investigation into Scientific and Educational Values of Wetlands and Rivers in the Perth-Bunbury Region –the objective of this study was to assess the environmental and recreational significance of rivers and wetlands to facilitate the responsible planning and allocation of water resources in the Perth to Bunbury region. c) A Systematic Overview of Environmental Values of the Wetlands, Rivers and Estuaries of the Busselton-Walpole Region – provides a systematic overview of the environmental values of the wetlands, rivers and estuaries of the Busselton to Walpole Region. It also identifies many of the important and valuable wetlands that warrant planning and management protection. Wetlands that have not been identified through the above processes can be assigned a category through second tier assessment methods. In most cases such wetlands are not considered to be CCWs. Second tier assessment methods are: EPA Bulletin Methods 227, 374 and 686; wetlands scored on selected natural attributes and human use criteria. It should be noted that if a wetland contains rare flora or fauna, the wetland is automatically assigned conservation category status; direct assessment of wetland vegetation status (through photographs, maps {topographic and geological}, research and site visits); and assessment made of the 'naturalness' using an estimate from aerial photos of the percentage of the wetland which is native vegetation and undisturbed. Since the Atlas was published in 1996, there have been several verifications of the environmental values of the CCWs in the Perth Metropolitan area and evaluations undertaken south of Mandurah: 1997 - for the release of draft Perth's Bushplan, the V & C Semeniuk Research Group undertook a verification of all the CCWs outside those that were proposed for inclusion in Bush Forever, Lakes EPP and reserves and some other areas of crown land in the Perth Metropolitan area. Aerial photography was used which was backed up with site visits. The confirmed CCWs were included in the draft Perth's Bushplan mapping (which identifies CCWs both within and outside Bush Forever sites); 1998 – for wetlands south of Mandurah, the V&C Semeniuk Research Group was hired to undertake an evaluation of all the wetlands between Mandurah and Dunsborough. The methodology used was the evaluation designed by the Semeniuk Research Group designed to specifically represent and capture the diversity of wetlands in the area. The assessment is based upon the following six criteria: a) Representativeness of a wetland type; b) Unaltered, unusual or representative wetland processes; c) Habitats for rare or endangered fauna or diversity of habitat; d) Wetland functions including maintaining large faunal populations, being a refuge or important for migratory populations or being significant hydrologically; e) Biodiversity including unaltered vegetation and fauna, scarce or diverse vegetation or fauna; and f) Scientific value including unusual geomorphology or sediments and significant pollen records. A wetland is categorised as a CCW if it meets one of the above criteria. 1999: The Water and Rivers Commission hired Alan Tingay and Associates to conduct a 'risk assessment' study on the 521 CCWs that were not currently protected. The aim was to identify how many of the 521 CCWs were at risk of no longer being a CCW. This could be due to clearing or development of the wetland or suspected impacts of surrounding landuses. 2000 - the Commission undertook verification of CCWs for the release of Perth's Bush Forever (formerly Perth's Bushplan). The Commission hired environmental consultants Ecologia and ATA Environmental to carry out evaluations using the EPA's Bulletin 686 for the risk sites identified by Alan Tingay and Associates in 1999. Verification by the Commission also included another aerial photography assessment of all CCWs in the metropolitan area. Site visits and site reports from the Bushplan team that had been conducted on wetlands were also included. (2) Wetlands of the Swan Coastal Plain volumes are available at offices of the Commission, local government and libraries. Maps in Perth's Bush Forever identify CCW's in the Perth Metropolitan area and copies are available from the Department for Planning and Infrastructure, local government and libraries. The Commission has a Wetland Mapping Database, which is available digitally by request from the Commission at Head Office in East Perth. Copies of the First Tier reports can be viewed at the Commission's Head Office in East Perth. It is anticipated that all other reports mentioned above will be published in the future.
Wetlands meeting the criteria through the first tier assessment are automatically considered to be CCWs. International recognition – these are wetlands nominated by Australia for inclusion on the List of Wetlands of International Importance under the Ramsar Convention 1971; National recognition – some Swan Coastal Plain wetlands have recognition in the Australia Nature Conservation Authority's 1993 Directory of Important Wetlands in Australia and on the Australian Heritage Commission's Register of the National Estate . The Directory was updated in 2001 by Environment Australia; and Regional recognition – captures wetlands with recreational use, educational use, environmental, Aboriginal or historical significance. The studies identifying wetlands with regional significance are: a) Conservation Through Reserves - System 6 – identifies opportunities for setting aside areas of land in the most intensively used part of WA, for the purposes of conservation of natural areas and recreation in natural surroundings. The reserves represent the major communities of natural wildlife or flora types in WA. b) Report on an Investigation into Scientific and Educational Values of Wetlands and Rivers in the Perth-Bunbury Region –the objective of this study was to assess the environmental and recreational significance of rivers and wetlands to facilitate the responsible planning and allocation of water resources in the Perth to Bunbury region. c) A Systematic Overview of Environmental Values of the Wetlands, Rivers and Estuaries of the Busselton-Walpole Region – provides a systematic overview of the environmental values of the wetlands, rivers and estuaries of the Busselton to Walpole Region. It also identifies many of the important and valuable wetlands that warrant planning and management protection. Wetlands that have not been identified through the above processes can be assigned a category through second tier assessment methods. In most cases such wetlands are not considered to be CCWs. Second tier assessment methods are: EPA Bulletin Methods 227, 374 and 686; wetlands scored on selected natural attributes and human use criteria. It should be noted that if a wetland contains rare flora or fauna, the wetland is automatically assigned conservation category status; direct assessment of wetland vegetation status (through photographs, maps {topographic and geological}, research and site visits); and assessment made of the 'naturalness' using an estimate from aerial photos of the percentage of the wetland which is native vegetation and undisturbed. Since the Atlas was published in 1996, there have been several verifications of the environmental values of the CCWs in the Perth Metropolitan area and evaluations undertaken south of Mandurah: 1997 - for the release of draft Perth's Bushplan, the V & C Semeniuk Research Group undertook a verification of all the CCWs outside those that were proposed for inclusion in Bush Forever, Lakes EPP and reserves and some other areas of crown land in the Perth Metropolitan area. Aerial photography was used which was backed up with site visits. The confirmed CCWs were included in the draft Perth's Bushplan mapping (which identifies CCWs both within and outside Bush Forever sites); 1998 – for wetlands south of Mandurah, the V&C Semeniuk Research Group was hired to undertake an evaluation of all the wetlands between Mandurah and Dunsborough. The methodology used was the evaluation designed by the Semeniuk Research Group designed to specifically represent and capture the diversity of wetlands in the area. The assessment is based upon the following six criteria: a) Representativeness of a wetland type; b) Unaltered, unusual or representative wetland processes; c) Habitats for rare or endangered fauna or diversity of habitat; d) Wetland functions including maintaining large faunal populations, being a refuge or important for migratory populations or being significant hydrologically; e) Biodiversity including unaltered vegetation and fauna, scarce or diverse vegetation or fauna; and f) Scientific value including unusual geomorphology or sediments and significant pollen records. A wetland is categorised as a CCW if it meets one of the above criteria. 1999: The Water and Rivers Commission hired Alan Tingay and Associates to conduct a 'risk assessment' study on the 521 CCWs that were not currently protected. The aim was to identify how many of the 521 CCWs were at risk of no longer being a CCW. This could be due to clearing or development of the wetland or suspected impacts of surrounding landuses. 2000 - the Commission undertook verification of CCWs for the release of Perth's Bush Forever (formerly Perth's Bushplan). The Commission hired environmental consultants Ecologia and ATA Environmental to carry out evaluations using the EPA's Bulletin 686 for the risk sites identified by Alan Tingay and Associates in 1999. Verification by the Commission also included another aerial photography assessment of all CCWs in the metropolitan area. Site visits and site reports from the Bushplan team that had been conducted on wetlands were also included. (2) Wetlands of the Swan Coastal Plain volumes are available at offices of the Commission, local government and libraries. Maps in Perth's Bush Forever identify CCW's in the Perth Metropolitan area and copies are available from the Department for Planning and Infrastructure, local government and libraries. The Commission has a Wetland Mapping Database, which is available digitally by request from the Commission at Head Office in East Perth. Copies of the First Tier reports can be viewed at the Commission's Head Office in East Perth. It is anticipated that all other reports mentioned above will be published in the future.
b) Report on an Investigation into Scientific and Educational Values of Wetlands and Rivers in the Perth-Bunbury Region –the objective of this study was to assess the environmental and recreational significance of rivers and wetlands to facilitate the responsible planning and allocation of water resources in the Perth to Bunbury region. c) A Systematic Overview of Environmental Values of the Wetlands, Rivers and Estuaries of the Busselton-Walpole Region – provides a systematic overview of the environmental values of the wetlands, rivers and estuaries of the Busselton to Walpole Region. It also identifies many of the important and valuable wetlands that warrant planning and management protection.
c) A Systematic Overview of Environmental Values of the Wetlands, Rivers and Estuaries of the Busselton-Walpole Region – provides a systematic overview of the environmental values of the wetlands, rivers and estuaries of the Busselton to Walpole Region. It also identifies many of the important and valuable wetlands that warrant planning and management protection.
b) Unaltered, unusual or representative wetland processes; c) Habitats for rare or endangered fauna or diversity of habitat; d) Wetland functions including maintaining large faunal populations, being a refuge or important for migratory populations or being significant hydrologically; e) Biodiversity including unaltered vegetation and fauna, scarce or diverse vegetation or fauna; and f) Scientific value including unusual geomorphology or sediments and significant pollen records. A wetland is categorised as a CCW if it meets one of the above criteria. 1999: The Water and Rivers Commission hired Alan Tingay and Associates to conduct a 'risk assessment' study on the 521 CCWs that were not currently protected. The aim was to identify how many of the 521 CCWs were at risk of no longer being a CCW. This could be due to clearing or development of the wetland or suspected impacts of surrounding landuses. 2000 - the Commission undertook verification of CCWs for the release of Perth's Bush Forever (formerly Perth's Bushplan). The Commission hired environmental consultants Ecologia and ATA Environmental to carry out evaluations using the EPA's Bulletin 686 for the risk sites identified by Alan Tingay and Associates in 1999. Verification by the Commission also included another aerial photography assessment of all CCWs in the metropolitan area. Site visits and site reports from the Bushplan team that had been conducted on wetlands were also included.
c) Habitats for rare or endangered fauna or diversity of habitat; d) Wetland functions including maintaining large faunal populations, being a refuge or important for migratory populations or being significant hydrologically; e) Biodiversity including unaltered vegetation and fauna, scarce or diverse vegetation or fauna; and f) Scientific value including unusual geomorphology or sediments and significant pollen records. A wetland is categorised as a CCW if it meets one of the above criteria. 1999: The Water and Rivers Commission hired Alan Tingay and Associates to conduct a 'risk assessment' study on the 521 CCWs that were not currently protected. The aim was to identify how many of the 521 CCWs were at risk of no longer being a CCW. This could be due to clearing or development of the wetland or suspected impacts of surrounding landuses. 2000 - the Commission undertook verification of CCWs for the release of Perth's Bush Forever (formerly Perth's Bushplan). The Commission hired environmental consultants Ecologia and ATA Environmental to carry out evaluations using the EPA's Bulletin 686 for the risk sites identified by Alan Tingay and Associates in 1999. Verification by the Commission also included another aerial photography assessment of all CCWs in the metropolitan area. Site visits and site reports from the Bushplan team that had been conducted on wetlands were also included.
d) Wetland functions including maintaining large faunal populations, being a refuge or important for migratory populations or being significant hydrologically; e) Biodiversity including unaltered vegetation and fauna, scarce or diverse vegetation or fauna; and f) Scientific value including unusual geomorphology or sediments and significant pollen records. A wetland is categorised as a CCW if it meets one of the above criteria. 1999: The Water and Rivers Commission hired Alan Tingay and Associates to conduct a 'risk assessment' study on the 521 CCWs that were not currently protected. The aim was to identify how many of the 521 CCWs were at risk of no longer being a CCW. This could be due to clearing or development of the wetland or suspected impacts of surrounding landuses. 2000 - the Commission undertook verification of CCWs for the release of Perth's Bush Forever (formerly Perth's Bushplan). The Commission hired environmental consultants Ecologia and ATA Environmental to carry out evaluations using the EPA's Bulletin 686 for the risk sites identified by Alan Tingay and Associates in 1999. Verification by the Commission also included another aerial photography assessment of all CCWs in the metropolitan area. Site visits and site reports from the Bushplan team that had been conducted on wetlands were also included.
e) Biodiversity including unaltered vegetation and fauna, scarce or diverse vegetation or fauna; and f) Scientific value including unusual geomorphology or sediments and significant pollen records. A wetland is categorised as a CCW if it meets one of the above criteria. 1999: The Water and Rivers Commission hired Alan Tingay and Associates to conduct a 'risk assessment' study on the 521 CCWs that were not currently protected. The aim was to identify how many of the 521 CCWs were at risk of no longer being a CCW. This could be due to clearing or development of the wetland or suspected impacts of surrounding landuses. 2000 - the Commission undertook verification of CCWs for the release of Perth's Bush Forever (formerly Perth's Bushplan). The Commission hired environmental consultants Ecologia and ATA Environmental to carry out evaluations using the EPA's Bulletin 686 for the risk sites identified by Alan Tingay and Associates in 1999. Verification by the Commission also included another aerial photography assessment of all CCWs in the metropolitan area. Site visits and site reports from the Bushplan team that had been conducted on wetlands were also included.
f) Scientific value including unusual geomorphology or sediments and significant pollen records. A wetland is categorised as a CCW if it meets one of the above criteria. 1999: The Water and Rivers Commission hired Alan Tingay and Associates to conduct a 'risk assessment' study on the 521 CCWs that were not currently protected. The aim was to identify how many of the 521 CCWs were at risk of no longer being a CCW. This could be due to clearing or development of the wetland or suspected impacts of surrounding landuses. 2000 - the Commission undertook verification of CCWs for the release of Perth's Bush Forever (formerly Perth's Bushplan). The Commission hired environmental consultants Ecologia and ATA Environmental to carry out evaluations using the EPA's Bulletin 686 for the risk sites identified by Alan Tingay and Associates in 1999. Verification by the Commission also included another aerial photography assessment of all CCWs in the metropolitan area. Site visits and site reports from the Bushplan team that had been conducted on wetlands were also included.
A wetland is categorised as a CCW if it meets one of the above criteria. 1999: The Water and Rivers Commission hired Alan Tingay and Associates to conduct a 'risk assessment' study on the 521 CCWs that were not currently protected. The aim was to identify how many of the 521 CCWs were at risk of no longer being a CCW. This could be due to clearing or development of the wetland or suspected impacts of surrounding landuses. 2000 - the Commission undertook verification of CCWs for the release of Perth's Bush Forever (formerly Perth's Bushplan). The Commission hired environmental consultants Ecologia and ATA Environmental to carry out evaluations using the EPA's Bulletin 686 for the risk sites identified by Alan Tingay and Associates in 1999. Verification by the Commission also included another aerial photography assessment of all CCWs in the metropolitan area. Site visits and site reports from the Bushplan team that had been conducted on wetlands were also included.
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