❓ A WA parliamentary question seeks clarification on groundwater extraction estimation methods, abstraction levels from licensed and unlicensed bores in Perth, and the relevance of these calculations to the South West Yarragadee aquifer project. The Minister provides estimations based on surveys, crop factors, and licensing, stating the project is for scheme water, not irrigation.
AnsweredQoN 297Legislative Council
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GROUND WATER BORES
My question is further to question without notice 265 asked on Tuesday, 9 May 2006. Noting that there are 154 095 bores in the Perth metropolitan area, of which only 4 097 are licensed and just 45 are metered, I ask - (1) How does the government establish the annual level of ground water extraction from the 154 050 unmetered bores in the Perth metropolitan area? (2) What is the annual level of abstraction from those bores, expressed in kilolitres, and what level of certainty is assigned to that number? (3) What is the level of abstraction from the 4 097 licensed bores in the Perth metropolitan area? (4) How is that level of abstraction calculated? (5) How do these calculations figure in the decisions relating to the proposal to tap into the south west Yarragadee? Hon KIM CHANCE
My question is further to question without notice 265 asked on Tuesday, 9 May 2006. Noting that there are 154 095 bores in the Perth metropolitan area, of which only 4 097 are licensed and just 45 are metered, I ask - (1) How does the government establish the annual level of ground water extraction from the 154 050 unmetered bores in the Perth metropolitan area? (2) What is the annual level of abstraction from those bores, expressed in kilolitres, and what level of certainty is assigned to that number? (3) What is the level of abstraction from the 4 097 licensed bores in the Perth metropolitan area? (4) How is that level of abstraction calculated? (5) How do these calculations figure in the decisions relating to the proposal to tap into the south west Yarragadee? Hon KIM CHANCE
AnswerView source ↗
I thank the member for some notice of this question. (1) It will be done by surveys and studies for garden bores and by the use of crop factors, areas irrigated and allocated amounts for the licensed bores. (2) For garden bores it is estimated that 120 million kilolitres a year is extracted, and for licensed unmetered bores, 48 million kilolitres as at 11 May 2006. The total estimated figure is therefore 168 million kilolitres. This figure is an estimation of use based on surveys and studies of garden bores, crop factors and areas irrigated and used in allocation and licensing for licensed unmetered bores. (3) The level of abstraction as at 11 May 2006 is 145 million kilolitres. (4) The amount of abstraction is calculated by the number of bores, and for each bore the area to be irrigated and the crop type, referred to as a crop factor. (5) These calculation figures do not directly affect the decision to tap the south west Yarragadee aquifer, as the south west Yarragadee proposal is for scheme water rather than irrigation water.
(1) How does the government establish the annual level of ground water extraction from the 154 050 unmetered bores in the Perth metropolitan area? (2) What is the annual level of abstraction from those bores, expressed in kilolitres, and what level of certainty is assigned to that number? (3) What is the level of abstraction from the 4 097 licensed bores in the Perth metropolitan area? (4) How is that level of abstraction calculated? (5) How do these calculations figure in the decisions relating to the proposal to tap into the south west Yarragadee? Hon KIM CHANCE replied: I thank the member for some notice of this question. (1) It will be done by surveys and studies for garden bores and by the use of crop factors, areas irrigated and allocated amounts for the licensed bores. (2) For garden bores it is estimated that 120 million kilolitres a year is extracted, and for licensed unmetered bores, 48 million kilolitres as at 11 May 2006. The total estimated figure is therefore 168 million kilolitres. This figure is an estimation of use based on surveys and studies of garden bores, crop factors and areas irrigated and used in allocation and licensing for licensed unmetered bores. (3) The level of abstraction as at 11 May 2006 is 145 million kilolitres. (4) The amount of abstraction is calculated by the number of bores, and for each bore the area to be irrigated and the crop type, referred to as a crop factor. (5) These calculation figures do not directly affect the decision to tap the south west Yarragadee aquifer, as the south west Yarragadee proposal is for scheme water rather than irrigation water.
(2) What is the annual level of abstraction from those bores, expressed in kilolitres, and what level of certainty is assigned to that number? (3) What is the level of abstraction from the 4 097 licensed bores in the Perth metropolitan area? (4) How is that level of abstraction calculated? (5) How do these calculations figure in the decisions relating to the proposal to tap into the south west Yarragadee? Hon KIM CHANCE replied: I thank the member for some notice of this question. (1) It will be done by surveys and studies for garden bores and by the use of crop factors, areas irrigated and allocated amounts for the licensed bores. (2) For garden bores it is estimated that 120 million kilolitres a year is extracted, and for licensed unmetered bores, 48 million kilolitres as at 11 May 2006. The total estimated figure is therefore 168 million kilolitres. This figure is an estimation of use based on surveys and studies of garden bores, crop factors and areas irrigated and used in allocation and licensing for licensed unmetered bores. (3) The level of abstraction as at 11 May 2006 is 145 million kilolitres. (4) The amount of abstraction is calculated by the number of bores, and for each bore the area to be irrigated and the crop type, referred to as a crop factor. (5) These calculation figures do not directly affect the decision to tap the south west Yarragadee aquifer, as the south west Yarragadee proposal is for scheme water rather than irrigation water.
(3) What is the level of abstraction from the 4 097 licensed bores in the Perth metropolitan area? (4) How is that level of abstraction calculated? (5) How do these calculations figure in the decisions relating to the proposal to tap into the south west Yarragadee? Hon KIM CHANCE replied: I thank the member for some notice of this question. (1) It will be done by surveys and studies for garden bores and by the use of crop factors, areas irrigated and allocated amounts for the licensed bores. (2) For garden bores it is estimated that 120 million kilolitres a year is extracted, and for licensed unmetered bores, 48 million kilolitres as at 11 May 2006. The total estimated figure is therefore 168 million kilolitres. This figure is an estimation of use based on surveys and studies of garden bores, crop factors and areas irrigated and used in allocation and licensing for licensed unmetered bores. (3) The level of abstraction as at 11 May 2006 is 145 million kilolitres. (4) The amount of abstraction is calculated by the number of bores, and for each bore the area to be irrigated and the crop type, referred to as a crop factor. (5) These calculation figures do not directly affect the decision to tap the south west Yarragadee aquifer, as the south west Yarragadee proposal is for scheme water rather than irrigation water.
(4) How is that level of abstraction calculated? (5) How do these calculations figure in the decisions relating to the proposal to tap into the south west Yarragadee? Hon KIM CHANCE replied: I thank the member for some notice of this question. (1) It will be done by surveys and studies for garden bores and by the use of crop factors, areas irrigated and allocated amounts for the licensed bores. (2) For garden bores it is estimated that 120 million kilolitres a year is extracted, and for licensed unmetered bores, 48 million kilolitres as at 11 May 2006. The total estimated figure is therefore 168 million kilolitres. This figure is an estimation of use based on surveys and studies of garden bores, crop factors and areas irrigated and used in allocation and licensing for licensed unmetered bores. (3) The level of abstraction as at 11 May 2006 is 145 million kilolitres. (4) The amount of abstraction is calculated by the number of bores, and for each bore the area to be irrigated and the crop type, referred to as a crop factor. (5) These calculation figures do not directly affect the decision to tap the south west Yarragadee aquifer, as the south west Yarragadee proposal is for scheme water rather than irrigation water.
(5) How do these calculations figure in the decisions relating to the proposal to tap into the south west Yarragadee? Hon KIM CHANCE replied: I thank the member for some notice of this question. (1) It will be done by surveys and studies for garden bores and by the use of crop factors, areas irrigated and allocated amounts for the licensed bores. (2) For garden bores it is estimated that 120 million kilolitres a year is extracted, and for licensed unmetered bores, 48 million kilolitres as at 11 May 2006. The total estimated figure is therefore 168 million kilolitres. This figure is an estimation of use based on surveys and studies of garden bores, crop factors and areas irrigated and used in allocation and licensing for licensed unmetered bores. (3) The level of abstraction as at 11 May 2006 is 145 million kilolitres. (4) The amount of abstraction is calculated by the number of bores, and for each bore the area to be irrigated and the crop type, referred to as a crop factor. (5) These calculation figures do not directly affect the decision to tap the south west Yarragadee aquifer, as the south west Yarragadee proposal is for scheme water rather than irrigation water.
Hon KIM CHANCE replied: I thank the member for some notice of this question. (1) It will be done by surveys and studies for garden bores and by the use of crop factors, areas irrigated and allocated amounts for the licensed bores. (2) For garden bores it is estimated that 120 million kilolitres a year is extracted, and for licensed unmetered bores, 48 million kilolitres as at 11 May 2006. The total estimated figure is therefore 168 million kilolitres. This figure is an estimation of use based on surveys and studies of garden bores, crop factors and areas irrigated and used in allocation and licensing for licensed unmetered bores. (3) The level of abstraction as at 11 May 2006 is 145 million kilolitres. (4) The amount of abstraction is calculated by the number of bores, and for each bore the area to be irrigated and the crop type, referred to as a crop factor. (5) These calculation figures do not directly affect the decision to tap the south west Yarragadee aquifer, as the south west Yarragadee proposal is for scheme water rather than irrigation water.
I thank the member for some notice of this question. (1) It will be done by surveys and studies for garden bores and by the use of crop factors, areas irrigated and allocated amounts for the licensed bores. (2) For garden bores it is estimated that 120 million kilolitres a year is extracted, and for licensed unmetered bores, 48 million kilolitres as at 11 May 2006. The total estimated figure is therefore 168 million kilolitres. This figure is an estimation of use based on surveys and studies of garden bores, crop factors and areas irrigated and used in allocation and licensing for licensed unmetered bores. (3) The level of abstraction as at 11 May 2006 is 145 million kilolitres. (4) The amount of abstraction is calculated by the number of bores, and for each bore the area to be irrigated and the crop type, referred to as a crop factor. (5) These calculation figures do not directly affect the decision to tap the south west Yarragadee aquifer, as the south west Yarragadee proposal is for scheme water rather than irrigation water.
(1) It will be done by surveys and studies for garden bores and by the use of crop factors, areas irrigated and allocated amounts for the licensed bores. (2) For garden bores it is estimated that 120 million kilolitres a year is extracted, and for licensed unmetered bores, 48 million kilolitres as at 11 May 2006. The total estimated figure is therefore 168 million kilolitres. This figure is an estimation of use based on surveys and studies of garden bores, crop factors and areas irrigated and used in allocation and licensing for licensed unmetered bores. (3) The level of abstraction as at 11 May 2006 is 145 million kilolitres. (4) The amount of abstraction is calculated by the number of bores, and for each bore the area to be irrigated and the crop type, referred to as a crop factor. (5) These calculation figures do not directly affect the decision to tap the south west Yarragadee aquifer, as the south west Yarragadee proposal is for scheme water rather than irrigation water.
(2) For garden bores it is estimated that 120 million kilolitres a year is extracted, and for licensed unmetered bores, 48 million kilolitres as at 11 May 2006. The total estimated figure is therefore 168 million kilolitres. This figure is an estimation of use based on surveys and studies of garden bores, crop factors and areas irrigated and used in allocation and licensing for licensed unmetered bores. (3) The level of abstraction as at 11 May 2006 is 145 million kilolitres. (4) The amount of abstraction is calculated by the number of bores, and for each bore the area to be irrigated and the crop type, referred to as a crop factor. (5) These calculation figures do not directly affect the decision to tap the south west Yarragadee aquifer, as the south west Yarragadee proposal is for scheme water rather than irrigation water.
(3) The level of abstraction as at 11 May 2006 is 145 million kilolitres. (4) The amount of abstraction is calculated by the number of bores, and for each bore the area to be irrigated and the crop type, referred to as a crop factor. (5) These calculation figures do not directly affect the decision to tap the south west Yarragadee aquifer, as the south west Yarragadee proposal is for scheme water rather than irrigation water.
(4) The amount of abstraction is calculated by the number of bores, and for each bore the area to be irrigated and the crop type, referred to as a crop factor. (5) These calculation figures do not directly affect the decision to tap the south west Yarragadee aquifer, as the south west Yarragadee proposal is for scheme water rather than irrigation water.
(5) These calculation figures do not directly affect the decision to tap the south west Yarragadee aquifer, as the south west Yarragadee proposal is for scheme water rather than irrigation water.
(1) How does the government establish the annual level of ground water extraction from the 154 050 unmetered bores in the Perth metropolitan area? (2) What is the annual level of abstraction from those bores, expressed in kilolitres, and what level of certainty is assigned to that number? (3) What is the level of abstraction from the 4 097 licensed bores in the Perth metropolitan area? (4) How is that level of abstraction calculated? (5) How do these calculations figure in the decisions relating to the proposal to tap into the south west Yarragadee? Hon KIM CHANCE replied: I thank the member for some notice of this question. (1) It will be done by surveys and studies for garden bores and by the use of crop factors, areas irrigated and allocated amounts for the licensed bores. (2) For garden bores it is estimated that 120 million kilolitres a year is extracted, and for licensed unmetered bores, 48 million kilolitres as at 11 May 2006. The total estimated figure is therefore 168 million kilolitres. This figure is an estimation of use based on surveys and studies of garden bores, crop factors and areas irrigated and used in allocation and licensing for licensed unmetered bores. (3) The level of abstraction as at 11 May 2006 is 145 million kilolitres. (4) The amount of abstraction is calculated by the number of bores, and for each bore the area to be irrigated and the crop type, referred to as a crop factor. (5) These calculation figures do not directly affect the decision to tap the south west Yarragadee aquifer, as the south west Yarragadee proposal is for scheme water rather than irrigation water.
(2) What is the annual level of abstraction from those bores, expressed in kilolitres, and what level of certainty is assigned to that number? (3) What is the level of abstraction from the 4 097 licensed bores in the Perth metropolitan area? (4) How is that level of abstraction calculated? (5) How do these calculations figure in the decisions relating to the proposal to tap into the south west Yarragadee? Hon KIM CHANCE replied: I thank the member for some notice of this question. (1) It will be done by surveys and studies for garden bores and by the use of crop factors, areas irrigated and allocated amounts for the licensed bores. (2) For garden bores it is estimated that 120 million kilolitres a year is extracted, and for licensed unmetered bores, 48 million kilolitres as at 11 May 2006. The total estimated figure is therefore 168 million kilolitres. This figure is an estimation of use based on surveys and studies of garden bores, crop factors and areas irrigated and used in allocation and licensing for licensed unmetered bores. (3) The level of abstraction as at 11 May 2006 is 145 million kilolitres. (4) The amount of abstraction is calculated by the number of bores, and for each bore the area to be irrigated and the crop type, referred to as a crop factor. (5) These calculation figures do not directly affect the decision to tap the south west Yarragadee aquifer, as the south west Yarragadee proposal is for scheme water rather than irrigation water.
(3) What is the level of abstraction from the 4 097 licensed bores in the Perth metropolitan area? (4) How is that level of abstraction calculated? (5) How do these calculations figure in the decisions relating to the proposal to tap into the south west Yarragadee? Hon KIM CHANCE replied: I thank the member for some notice of this question. (1) It will be done by surveys and studies for garden bores and by the use of crop factors, areas irrigated and allocated amounts for the licensed bores. (2) For garden bores it is estimated that 120 million kilolitres a year is extracted, and for licensed unmetered bores, 48 million kilolitres as at 11 May 2006. The total estimated figure is therefore 168 million kilolitres. This figure is an estimation of use based on surveys and studies of garden bores, crop factors and areas irrigated and used in allocation and licensing for licensed unmetered bores. (3) The level of abstraction as at 11 May 2006 is 145 million kilolitres. (4) The amount of abstraction is calculated by the number of bores, and for each bore the area to be irrigated and the crop type, referred to as a crop factor. (5) These calculation figures do not directly affect the decision to tap the south west Yarragadee aquifer, as the south west Yarragadee proposal is for scheme water rather than irrigation water.
(4) How is that level of abstraction calculated? (5) How do these calculations figure in the decisions relating to the proposal to tap into the south west Yarragadee? Hon KIM CHANCE replied: I thank the member for some notice of this question. (1) It will be done by surveys and studies for garden bores and by the use of crop factors, areas irrigated and allocated amounts for the licensed bores. (2) For garden bores it is estimated that 120 million kilolitres a year is extracted, and for licensed unmetered bores, 48 million kilolitres as at 11 May 2006. The total estimated figure is therefore 168 million kilolitres. This figure is an estimation of use based on surveys and studies of garden bores, crop factors and areas irrigated and used in allocation and licensing for licensed unmetered bores. (3) The level of abstraction as at 11 May 2006 is 145 million kilolitres. (4) The amount of abstraction is calculated by the number of bores, and for each bore the area to be irrigated and the crop type, referred to as a crop factor. (5) These calculation figures do not directly affect the decision to tap the south west Yarragadee aquifer, as the south west Yarragadee proposal is for scheme water rather than irrigation water.
(5) How do these calculations figure in the decisions relating to the proposal to tap into the south west Yarragadee? Hon KIM CHANCE replied: I thank the member for some notice of this question. (1) It will be done by surveys and studies for garden bores and by the use of crop factors, areas irrigated and allocated amounts for the licensed bores. (2) For garden bores it is estimated that 120 million kilolitres a year is extracted, and for licensed unmetered bores, 48 million kilolitres as at 11 May 2006. The total estimated figure is therefore 168 million kilolitres. This figure is an estimation of use based on surveys and studies of garden bores, crop factors and areas irrigated and used in allocation and licensing for licensed unmetered bores. (3) The level of abstraction as at 11 May 2006 is 145 million kilolitres. (4) The amount of abstraction is calculated by the number of bores, and for each bore the area to be irrigated and the crop type, referred to as a crop factor. (5) These calculation figures do not directly affect the decision to tap the south west Yarragadee aquifer, as the south west Yarragadee proposal is for scheme water rather than irrigation water.
Hon KIM CHANCE replied: I thank the member for some notice of this question. (1) It will be done by surveys and studies for garden bores and by the use of crop factors, areas irrigated and allocated amounts for the licensed bores. (2) For garden bores it is estimated that 120 million kilolitres a year is extracted, and for licensed unmetered bores, 48 million kilolitres as at 11 May 2006. The total estimated figure is therefore 168 million kilolitres. This figure is an estimation of use based on surveys and studies of garden bores, crop factors and areas irrigated and used in allocation and licensing for licensed unmetered bores. (3) The level of abstraction as at 11 May 2006 is 145 million kilolitres. (4) The amount of abstraction is calculated by the number of bores, and for each bore the area to be irrigated and the crop type, referred to as a crop factor. (5) These calculation figures do not directly affect the decision to tap the south west Yarragadee aquifer, as the south west Yarragadee proposal is for scheme water rather than irrigation water.
I thank the member for some notice of this question. (1) It will be done by surveys and studies for garden bores and by the use of crop factors, areas irrigated and allocated amounts for the licensed bores. (2) For garden bores it is estimated that 120 million kilolitres a year is extracted, and for licensed unmetered bores, 48 million kilolitres as at 11 May 2006. The total estimated figure is therefore 168 million kilolitres. This figure is an estimation of use based on surveys and studies of garden bores, crop factors and areas irrigated and used in allocation and licensing for licensed unmetered bores. (3) The level of abstraction as at 11 May 2006 is 145 million kilolitres. (4) The amount of abstraction is calculated by the number of bores, and for each bore the area to be irrigated and the crop type, referred to as a crop factor. (5) These calculation figures do not directly affect the decision to tap the south west Yarragadee aquifer, as the south west Yarragadee proposal is for scheme water rather than irrigation water.
(1) It will be done by surveys and studies for garden bores and by the use of crop factors, areas irrigated and allocated amounts for the licensed bores. (2) For garden bores it is estimated that 120 million kilolitres a year is extracted, and for licensed unmetered bores, 48 million kilolitres as at 11 May 2006. The total estimated figure is therefore 168 million kilolitres. This figure is an estimation of use based on surveys and studies of garden bores, crop factors and areas irrigated and used in allocation and licensing for licensed unmetered bores. (3) The level of abstraction as at 11 May 2006 is 145 million kilolitres. (4) The amount of abstraction is calculated by the number of bores, and for each bore the area to be irrigated and the crop type, referred to as a crop factor. (5) These calculation figures do not directly affect the decision to tap the south west Yarragadee aquifer, as the south west Yarragadee proposal is for scheme water rather than irrigation water.
(2) For garden bores it is estimated that 120 million kilolitres a year is extracted, and for licensed unmetered bores, 48 million kilolitres as at 11 May 2006. The total estimated figure is therefore 168 million kilolitres. This figure is an estimation of use based on surveys and studies of garden bores, crop factors and areas irrigated and used in allocation and licensing for licensed unmetered bores. (3) The level of abstraction as at 11 May 2006 is 145 million kilolitres. (4) The amount of abstraction is calculated by the number of bores, and for each bore the area to be irrigated and the crop type, referred to as a crop factor. (5) These calculation figures do not directly affect the decision to tap the south west Yarragadee aquifer, as the south west Yarragadee proposal is for scheme water rather than irrigation water.
(3) The level of abstraction as at 11 May 2006 is 145 million kilolitres. (4) The amount of abstraction is calculated by the number of bores, and for each bore the area to be irrigated and the crop type, referred to as a crop factor. (5) These calculation figures do not directly affect the decision to tap the south west Yarragadee aquifer, as the south west Yarragadee proposal is for scheme water rather than irrigation water.
(4) The amount of abstraction is calculated by the number of bores, and for each bore the area to be irrigated and the crop type, referred to as a crop factor. (5) These calculation figures do not directly affect the decision to tap the south west Yarragadee aquifer, as the south west Yarragadee proposal is for scheme water rather than irrigation water.
(5) These calculation figures do not directly affect the decision to tap the south west Yarragadee aquifer, as the south west Yarragadee proposal is for scheme water rather than irrigation water.
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