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) Conceptual Model CloudGMS 49 Table 9 Conceptualisation of hydrologic processes, their interaction and the relevant MIKESHE model process used to represent the aquifer systems of the Western Davenport WCD. Component Conceptualisation MIKE SHE 1 Rainfall falls on bare soil or is intercepted by the sparse vegetation. The intercepted precipitation is evaporated or passed to the soil surface. Overland flow module 2 When the top layer of the unsaturated zone becomes saturated or when rainfall cannot infiltrate fast enough or when streams flood over their banks, there is surface ponding and eventually overland flow begins when all the surface depressions are filled. The overland water flow path and quantity is determined by the topography and flow resistance, as well as losses due to evaporation and infiltration along the path it takes, eventually reaching streams, rivers and other surface water bodies. 3 Rainfall also infiltrates to the unsaturated zone. The infiltrated water in the unsaturated zone can be stored; Unsaturated zone & Evapotranspiration modules 4 A significant amount of rainfall, reaching the soil surface, evaporates back to the atmosphere; or 5 Infiltrated water is taken up by plant roots and transpired through the leaves; 6 Infiltrated water percolates down through the unsaturated zone to the saturated zone as direct recharge. 7 Changes in storage increases due to recharge and decreases due to groundwater extraction and groundwater throughflow; Saturated zone module 8 Groundwater throughflow to the north to the Wiso Basin; 9 Extraction from the groundwater for community supplies, horticulture / irrigation and stock watering.