❓ This WA parliamentary question concerns the Wharf Street Wetland and Civic Parkland, including its construction costs, ongoing maintenance expenses, and water quality monitoring results from 2009-2012. The response provides detailed financial and scientific data related to the wetland's performance.
AnsweredQoN 5990Legislative Council
QuestionView source ↗
(4) Yes (5) Yes (6) (a) Water quality monitoring is undertaken monthly and during rainfall events to determine the performance of the wetland. (b) Median monthly grab sample results July 2009- February 2012 (Note data only available for wetland up to February 2012) Total Nitrogen (mg/l) Dissolved Organic Nitrogen (mg/l) Total Oxidised Nitrogen (mg/l) Ammonium Nitrogen (mg/l) Total Phosphorus (mg/L) Soluble Reactive Phosphorus (mg/L) 2009-10 Inlet 1.400 1.146* 0.091 0.062 0.180 0.037 2009-10 Outlet 0.885 0.781* 0.073 0.018 0.041 0.013 2010-11 Inlet 0.970 0.626* 0.054 0.043 0.140 0.012 2010-11 Outlet 0.585 0.464* 0.025 0.015 0.020 0.003 2011-12 Inlet 0.870 0.540* 0.075 0.084 0.065 0.019 2011-12 Outlet 0.780 0.664* 0.039 0.011 0.031 0.004 2009- 2012 Inlet 1.200 0.735* 0.072 0.062 0.135 0.024 2009- 2012 Outlet 0.750 0.628* 0.034 0.013 0.031 0.006 * Medians derived from calculated or partially calculated values. From September 2011 dissolved organic nitrogen has been measured quarterly. (c) Not applicable (7) Not applicable (8) Please see response to Question 6b Notice: This document is created or edited using unregistered or evaluation copy of rtLib valid for testing or development purposes only. To use it for productive or any other purposes please register it. You may purchase the license on http://www.rtlib.com
(c) Not applicable (7) Not applicable (8) Please see response to Question 6b Notice: This document is created or edited using unregistered or evaluation copy of rtLib valid for testing or development purposes only. To use it for productive or any other purposes please register it. You may purchase the license on http://www.rtlib.com
(c) Not applicable (7) Not applicable (8) Please see response to Question 6b Notice: This document is created or edited using unregistered or evaluation copy of rtLib valid for testing or development purposes only. To use it for productive or any other purposes please register it. You may purchase the license on http://www.rtlib.com
AnswerView source ↗
Answered
16 October 2012
Responded by
Minister for Mental Health representing the Minister for Environment
Response time
35 days
(1) The Wharf Street Wetland and Civic Parkland in the Canning Plain Catchment cost $2,686,001 to build. This figure is inclusive of planning, design and construction, but excludes project partner officer time.
(2) Yes
(3) Costs provided are for the 4 hectare Wharf Street Wetland Civic Gardens site, which includes approximately 1ha of constructed wetland. Since construction costs for activities such as weed and erosion control, replanting and maintaining hydraulic infrastructure paid for by the Swan River Trust and the City of Canning (inclusive of volunteer labour costs) are as follows:
Year
Costs
2009-10
$84,478.93
2010-11
$90,172.48
2011-12
$58, 918.17
Total
$233,569.58
(4) Yes
(5) Yes
(6) (a) Water quality monitoring is undertaken monthly and during rainfall events to determine the performance of the wetland.
(b) Median monthly grab sample results July 2009- February 2012 (Note data only available for wetland up to February 2012)
Total Nitrogen (mg/l)
Dissolved Organic Nitrogen (mg/l)
Total Oxidised Nitrogen (mg/l)
Ammonium Nitrogen (mg/l)
Total Phosphorus (mg/L)
Soluble Reactive Phosphorus (mg/L)
2009-10
Inlet
1.400
1.146*
0.091
0.062
0.180
0.037
2009-10 Outlet
0.885
0.781*
0.073
0.018
0.041
0.013
2010-11
Inlet
0.970
0.626*
0.054
0.043
0.140
0.012
2010-11 Outlet
0.585
0.464*
0.025
0.015
0.020
0.003
2011-12
Inlet
0.870
0.540*
0.075
0.084
0.065
0.019
2011-12 Outlet
0.780
0.664*
0.039
0.011
0.031
0.004
2009- 2012 Inlet
1.200
0.735*
0.072
0.062
0.135
0.024
2009- 2012 Outlet
0.750
0.628*
0.034
0.013
0.031
0.006
* Medians derived from calculated or partially calculated values. From September 2011 dissolved organic nitrogen has been measured quarterly.
(c) Not applicable
(7) Not applicable
(8) Please see response to Question 6b
Notice: This document is created or edited using unregistered or evaluation copy of rtLib valid for testing or development purposes only. To use it for productive or any other purposes please register it. You may purchase the license on
http://www.rtlib.com
(2) Yes
(3) Costs provided are for the 4 hectare Wharf Street Wetland Civic Gardens site, which includes approximately 1ha of constructed wetland. Since construction costs for activities such as weed and erosion control, replanting and maintaining hydraulic infrastructure paid for by the Swan River Trust and the City of Canning (inclusive of volunteer labour costs) are as follows:
Year
Costs
2009-10
$84,478.93
2010-11
$90,172.48
2011-12
$58, 918.17
Total
$233,569.58
(4) Yes
(5) Yes
(6) (a) Water quality monitoring is undertaken monthly and during rainfall events to determine the performance of the wetland.
(b) Median monthly grab sample results July 2009- February 2012 (Note data only available for wetland up to February 2012)
Total Nitrogen (mg/l)
Dissolved Organic Nitrogen (mg/l)
Total Oxidised Nitrogen (mg/l)
Ammonium Nitrogen (mg/l)
Total Phosphorus (mg/L)
Soluble Reactive Phosphorus (mg/L)
2009-10
Inlet
1.400
1.146*
0.091
0.062
0.180
0.037
2009-10 Outlet
0.885
0.781*
0.073
0.018
0.041
0.013
2010-11
Inlet
0.970
0.626*
0.054
0.043
0.140
0.012
2010-11 Outlet
0.585
0.464*
0.025
0.015
0.020
0.003
2011-12
Inlet
0.870
0.540*
0.075
0.084
0.065
0.019
2011-12 Outlet
0.780
0.664*
0.039
0.011
0.031
0.004
2009- 2012 Inlet
1.200
0.735*
0.072
0.062
0.135
0.024
2009- 2012 Outlet
0.750
0.628*
0.034
0.013
0.031
0.006
* Medians derived from calculated or partially calculated values. From September 2011 dissolved organic nitrogen has been measured quarterly.
(c) Not applicable
(7) Not applicable
(8) Please see response to Question 6b
Notice: This document is created or edited using unregistered or evaluation copy of rtLib valid for testing or development purposes only. To use it for productive or any other purposes please register it. You may purchase the license on
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