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) Available Data CloudGMS 23 light reddish brown and are both well sorted and well rounded. The sand has buried the preexisting topography and produced the modern essentially flat, nearly featureless landscape vegetated with spinifex and small shrubs. The sands may also form active and stabilised fields of northwest trending linear dunes, which are largely restricted to the south east of the study area. Calcrete (Czk) is common in outcrop in a northwesttrending band through the central portion of the study area near BMR BC2 and to the northwest of Wycliffe Well Creek. The calcrete is probably formed by evaporation of groundwater, similar to the system identified in the Ti Tree Basin (Haines, Bagas, Wyche, Simons, & Morris, 1990). Tertiary aged sediments, up to 100 metres thick, form a non-marine basin unconformably overlying the Palaeozoic rocks. They are generally not observed in outcrop, except for some silty limestone / calcrete near the central portion of the study area, at BMR BC2 and to the northwest of Wycliffe Well. The maximum thickness of the Cenozoic sediments is approximately in the centre of the study area and wedge out to the northeast over the Hatches Group rocks at the foothills of the Davenport Range. The distribution and thickness of the Cenozoic sediments were determined by Tickell, (2014) and are reproduced below in Figure 3-5.