Development of a Groundwater Model for the Western Davenport Plains
Knapton, Anthony; CloudGMS Pty Ltd
Northern Territory. Department of Environment, Parks and Water Security
E-Publications; E-Books; PublicationNT; WRD Technical Report 27/2017
Western Davenport Water Control District
CloudGMS has been commissioned by DENR to develop a numerical groundwater model of the aquifers within the central area of the WDWCD to improve confidence in the sustainability of the groundwater resources, as this is the area within the WCD with greatest potential for intensive development.
Made available by via Publications (Legal Deposit) Act 2004 (NT); Prepared for Dept Environment and Natural resources
Executive summary -- 1 Background -- 2 Physical -- 3 Available data -- 4 Conceptual model -- 5 Model design & construction -- 6 Parameter estimation -- 7 Water balances -- 8 Sensitivity analysis -- 9 Predictive scenarios -- 10 Conclusions -- 11 Reference -- 12 Document history and version control -- Appendix A - Groundwater level hydrographs - Appendix B - Alek range horticultural farm sub-regional modelling
Groundwater; Northern Territory; Western Davenport Water Control District; Conceptual mode
Northern Territory Governmnet
WRD Technical Report 27/2017
ix, 127 pages : colour illustration and maps ; 30 cm
Attribution International 4.0 (CC BY 4.0)
Northern Territory Government
https://hdl.handle.net/10070/842058 [LANT E-Publications: Development of a Groundwater Model for the Western Davenport Plains, version 1.1]
Western Davenport WCD Groundwater Model (v2.0) Available Data CloudGMS 13 3 Available data 3.1. Climatic data Climatic data are available at three rain gauges in the Western Davenport WCD (WDWCD) area. However, to ensure the continuity of data the SILO data drill was used to provide rainfall and evaporation data for this study. The SILO data site was located at Latitude, Longitude: -21.1500 134.3000 (Decimal Degrees), 2109'S 13418E Elevation: 448m. 3.1.1. Rainfall trends The SILO Data Drill rainfall data are presented in Figure 3-1 as annual totals with a trace of mass residual to show long-term trends in the rainfall record. The mass residual values show generally dryer than average conditions existing prior to 1970, and generally wetter than average conditions after 1970. Figure 3-1 Annual SILO rainfall totals with a trace of mass residual to show longer term trends in the rainfall (1900-2016). 3.1.2. Southern oscil lation index (SOI) The Southern Oscillation Index (SOI) shows sustained positive values over +8 on 6 occasions since 1970 (Figure 3-2), which correspond to La Nina events and higher rainfall years seen in Figure 3-1. These events lead to appreciable recharge to the aquifers via direct infiltration through the soil and as infiltration along drainage from surface water flows.