Territory Stories

Development of a Groundwater Model for the Western Davenport Plains

Details:

Title

Development of a Groundwater Model for the Western Davenport Plains

Creator

Knapton, Anthony; CloudGMS Pty Ltd

Commissioned by

Northern Territory. Department of Environment, Parks and Water Security

Collection

E-Publications; E-Books; PublicationNT; WRD Technical Report 27/2017

Date

2018-03

Location

Western Davenport Water Control District

Abstract

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.

Notes

Made available by via Publications (Legal Deposit) Act 2004 (NT); Prepared for Dept Environment and Natural resources

Table of contents

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

Language

English

Subject

Groundwater; Northern Territory; Western Davenport Water Control District; Conceptual mode

Publisher name

Northern Territory Governmnet

Place of publication

Palmerston

Edition

version 2.0

Series

WRD Technical Report 27/2017

Format

ix, 127 pages : colour illustration and maps ; 30 cm

File type

application/pdf

ISBN

9781743502976

Use

Attribution International 4.0 (CC BY 4.0)

Copyright owner

Northern Territory Government

License

https://creativecommons.org/licenses/by/4.0/

Related links

https://hdl.handle.net/10070/842058 [LANT E-Publications: Development of a Groundwater Model for the Western Davenport Plains, version 1.1]

Parent handle

https://hdl.handle.net/10070/858845

Citation address

https://hdl.handle.net/10070/858846

Page content

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.