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
2018-03
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
English
Groundwater; Northern Territory; Western Davenport Water Control District; Conceptual mode
Northern Territory Governmnet
Palmerston
version 2.0
WRD Technical Report 27/2017
ix, 127 pages : colour illustration and maps ; 30 cm
application/pdf
9781743502976
Attribution International 4.0 (CC BY 4.0)
Northern Territory Government
https://creativecommons.org/licenses/by/4.0/
https://hdl.handle.net/10070/842058 [LANT E-Publications: Development of a Groundwater Model for the Western Davenport Plains, version 1.1]
https://hdl.handle.net/10070/858845
https://hdl.handle.net/10070/858846
Western Davenport WCD Groundwater Model (v2.0) Predictive Scenarios CloudGMS 104 9.3. Central zone SZ water balance The impacts of the pumping scenarios considered can be assessed using changes to the saturated zone (SZ) water balance. The central zone average annual SZ water balance components determined for each of the scenarios are presented below in Table 34. The results are also presented graphically in Figure 9-4. Table 34 Average annual SZ water balance components for the Central Zone for the period 1970 - 2016. Component SC0 SC3 SC4 Total Vol. [GL] Ave. Annual Vol. [GL/yr] Total Vol. [GL] Ave. Annual Vol. [GL/yr] Total Vol. [GL] Ave. Annual Vol. [GL/yr] qrech -4361 -95 -4267 -93 -4223 -92 qolszpos 1836 40 1739 38 1531 33 qolszneg -115 -3 -114 -2 -88 -2 qetsz 2134 46 1994 43 1535 33 qszin -143 -3 -145 -3 -195 -4 qszout 107 2 106 2 94 2 dszsto -173 -4 -279 -6 -2898 -63 qszabsex 0 0 283 6 3827 83 qszdrin -193 -4 -193 -4 -192 -4 qszdrout 906 20 874 19 607 13 error -2 0 -2 0 -1 0 Figure 9-4 SZ water balance components for the central zone for the 3 scenarios considered. It should be noted that the evapotranspiration from the groundwater represented by the qetsz component reduces from 46.4 GL/yr for SC0 to 33.4 GL/yr for SC4, which is a decrease of ~30%. Comparing the storage change (dszsto) for SC4 indicates approximately 60% of the abstraction is met by storage in the aquifer resulting in drawdown of groundwater levels.