❓ Hon Dee Margetts questions the Environment portfolio regarding the sustainable yield of the South West Yarragadee Aquifer, focusing on the impact of rainfall patterns and climate change. The response outlines the definition of sustainable yield and the modelling scenarios being used to determine it.
AnsweredQoN 1288Legislative Council
QuestionView source ↗
Regarding the extension of the investigation into the South Yarragadee aquifer -
(1) What is an appropriate definition of the sustainable yield for water abstraction from the South West Yarragadee Aquifer?
(2) What is the estimate of the sustainable yield for the South West Yarragadee aquifer using the above definition?
(3) Is this estimate of the sustainable yield based on -
(a) long term rainfall patters for the region;
(b) the reduced rainfall pattern of the last two decades; or
(c) on the predicted further reduced rainfall pattern for the region into the future due to climate change?
(1) What is an appropriate definition of the sustainable yield for water abstraction from the South West Yarragadee Aquifer?
(2) What is the estimate of the sustainable yield for the South West Yarragadee aquifer using the above definition?
(3) Is this estimate of the sustainable yield based on -
(a) long term rainfall patters for the region;
(b) the reduced rainfall pattern of the last two decades; or
(c) on the predicted further reduced rainfall pattern for the region into the future due to climate change?
AnswerView source ↗
Answered
6 November 2003
Responded by
Minister for Local Government and Regional Development representing the Minister for the Environment
Response time
23 days
(b) the reduced rainfall pattern of the last two decades; or (c) on the predicted further reduced rainfall pattern for the region into the future due to climate change?
(c) on the predicted further reduced rainfall pattern for the region into the future due to climate change?
(1) The definition that will be used is the 2002 national definition developed by the National Groundwater Committee comprising of representatives of all States and Territories. The definition is: A groundwater extraction regime, measured over a specified planning time frame, that allows acceptable levels of stress and protects the higher value uses that have a dependency on the water. (2) The sustainable yield for the Yarragadee aquifer has yet to be determined. It is currently being determined through the modelling of aquifer responses to a number of future regional water use scenarios. The assessment of environmental impacts associated with increased levels of pumping will be central to the determination of a sustainable yield. (3) The estimate of sustainable yield will be carried out through the modelling of a number of scenarios which will include: a) long-term rainfall patterns for the region; b) the rainfall pattern over the last quarter century; and c) a projected drier climate.
A groundwater extraction regime, measured over a specified planning time frame, that allows acceptable levels of stress and protects the higher value uses that have a dependency on the water. (2) The sustainable yield for the Yarragadee aquifer has yet to be determined. It is currently being determined through the modelling of aquifer responses to a number of future regional water use scenarios. The assessment of environmental impacts associated with increased levels of pumping will be central to the determination of a sustainable yield. (3) The estimate of sustainable yield will be carried out through the modelling of a number of scenarios which will include: a) long-term rainfall patterns for the region; b) the rainfall pattern over the last quarter century; and c) a projected drier climate.
(2) The sustainable yield for the Yarragadee aquifer has yet to be determined. It is currently being determined through the modelling of aquifer responses to a number of future regional water use scenarios. The assessment of environmental impacts associated with increased levels of pumping will be central to the determination of a sustainable yield. (3) The estimate of sustainable yield will be carried out through the modelling of a number of scenarios which will include: a) long-term rainfall patterns for the region; b) the rainfall pattern over the last quarter century; and c) a projected drier climate.
(3) The estimate of sustainable yield will be carried out through the modelling of a number of scenarios which will include: a) long-term rainfall patterns for the region; b) the rainfall pattern over the last quarter century; and c) a projected drier climate.
a) long-term rainfall patterns for the region; b) the rainfall pattern over the last quarter century; and c) a projected drier climate.
(c) on the predicted further reduced rainfall pattern for the region into the future due to climate change?
(1) The definition that will be used is the 2002 national definition developed by the National Groundwater Committee comprising of representatives of all States and Territories. The definition is: A groundwater extraction regime, measured over a specified planning time frame, that allows acceptable levels of stress and protects the higher value uses that have a dependency on the water. (2) The sustainable yield for the Yarragadee aquifer has yet to be determined. It is currently being determined through the modelling of aquifer responses to a number of future regional water use scenarios. The assessment of environmental impacts associated with increased levels of pumping will be central to the determination of a sustainable yield. (3) The estimate of sustainable yield will be carried out through the modelling of a number of scenarios which will include: a) long-term rainfall patterns for the region; b) the rainfall pattern over the last quarter century; and c) a projected drier climate.
A groundwater extraction regime, measured over a specified planning time frame, that allows acceptable levels of stress and protects the higher value uses that have a dependency on the water. (2) The sustainable yield for the Yarragadee aquifer has yet to be determined. It is currently being determined through the modelling of aquifer responses to a number of future regional water use scenarios. The assessment of environmental impacts associated with increased levels of pumping will be central to the determination of a sustainable yield. (3) The estimate of sustainable yield will be carried out through the modelling of a number of scenarios which will include: a) long-term rainfall patterns for the region; b) the rainfall pattern over the last quarter century; and c) a projected drier climate.
(2) The sustainable yield for the Yarragadee aquifer has yet to be determined. It is currently being determined through the modelling of aquifer responses to a number of future regional water use scenarios. The assessment of environmental impacts associated with increased levels of pumping will be central to the determination of a sustainable yield. (3) The estimate of sustainable yield will be carried out through the modelling of a number of scenarios which will include: a) long-term rainfall patterns for the region; b) the rainfall pattern over the last quarter century; and c) a projected drier climate.
(3) The estimate of sustainable yield will be carried out through the modelling of a number of scenarios which will include: a) long-term rainfall patterns for the region; b) the rainfall pattern over the last quarter century; and c) a projected drier climate.
a) long-term rainfall patterns for the region; b) the rainfall pattern over the last quarter century; and c) a projected drier climate.
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