Booligal 1,020 570 542 340 Oxley 565 295 549 340 Note: These modelled data were prior to the summer irrigation, mostly cotton growing, becoming more popular in the Lachlan and likely does not represent current circumstances. Similar model outputs for current conditions would need to be provided by the NSW Office of Water. 1.7 Irrigation demand Irrigation demand is spread along the Lachlan River but has two areas of concentration, namely at Jemalong Weir where bulk diversions are made to the Jemalong Irrigation Area, and around Hillston where there has been major growth in irrigation over the past 20 years. The Hillston irrigation is from both river and groundwater sources. There is very little irrigation downstream of the Whealbah area which is located downstream of Hillston. 1.8 Flow-monitoring sites There are a large number of flow-monitoring stations along the regulated Lachlan River and also the effluent creeks. The NSW Office of Water’s real-time website provides information on these sites, and also a wide range of flow data and water quality information on the Lachlan catchment. See . 1.9 Hydrology modelling The NSW Office of Water’s Lachlan Integrated Quantity and Quality Model (IQQM) is used to represent flow relationships for the regulated river. The model can be used for a wide range of scenarios for different water sharing and distribution arrangements for the river’s main channel. Recently, Barma et al. (2010) developed hydrology models for the NSW Office of Water for 19 wetland systems downstream of Hillston and it is now possible to extend the river water sharing and distribution scenario modelling arrangements to these wetlands. These models could be used to examine different scenarios for environmental water use patterns and outcomes.
Booligal 1,020 570 542 340 Oxley 565 295 549 340 Note: These modelled data were prior to the summer irrigation, mostly cotton growing, becoming more popular in the Lachlan and likely does not represent current circumstances. Similar model outputs for current conditions would need to be provided by the NSW Office of Water. 1.7 Irrigation demand Irrigation demand is spread along the Lachlan River but has two areas of concentration, namely at Jemalong Weir where bulk diversions are made to the Jemalong Irrigation Area, and around Hillston where there has been major growth in irrigation over the past 20 years. The Hillston irrigation is from both river and groundwater sources. There is very little irrigation downstream of the Whealbah area which is located downstream of Hillston. 1.8 Flow-monitoring sites There are a large number of flow-monitoring stations along the regulated Lachlan River and also the effluent creeks. The NSW Office of Water’s real-time website provides information on these sites, and also a wide range of flow data and water quality information on the Lachlan catchment. See . 1.9 Hydrology modelling The NSW Office of Water’s Lachlan Integrated Quantity and Quality Model (IQQM) is used to represent flow relationships for the regulated river. The model can be used for a wide range of scenarios for different water sharing and distribution arrangements for the river’s main channel. Recently, Barma et al. (2010) developed hydrology models for the NSW Office of Water for 19 wetland systems downstream of Hillston and it is now possible to extend the river water sharing and distribution scenario modelling arrangements to these wetlands. These models could be used to examine different scenarios for environmental water use patterns and outcomes.
ewater-delivery-lachlan-river.docx