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) Physical Setting CloudGMS 11 Boundary conditions at the northwestern (downgroundwater hydraulic gradient) and south eastern (upgroundwater hydraulic gradient) ends of the domain are represented by general head boundaries and starting heads are as shown in Figure 4 for Layer 1 and are similar for Layers 2 and 3. 2.5.2. Sub-regional model The subregional drawdown model was used to demonstrate that the impacts of the horticulture borefield will not be felt by adjacent users and made the following conclusions: The farm development will have negligible impact on Ali Curung community water supply; The modelled drawdowns of the proposed borefield will neither interfere with Thring Swamp (some 20 km to the northwest of the borefield) nor with Wycliffe Creek; The Piggery Bore Swamp lies some 800 m east of the modelled zero drawdown contour and on this basis will be unaffected; and Only the downstream outlet of Warrabri Swamp at bore, RN002881 lies within the radius of influence (at approximately the 2 m drawdown contour) but this is not believed to be a true GDE. 2.5.3. Solute transport model The third model domain was constructed in order to carry out solute transport modelling to examine the distribution and fate of groundwater salinity during production pumping.