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) Background CloudGMS 2 Predictive groundwater flow modelling; Predictive uncertainty analysis; and Model development and scenario documentation. 1.4. Modelling process The modelling study will be completed as a staged approach in accordance with the 2012 Australian Groundwater Modelling Guidelines (Barnett et al, 2012). A flow diagram of the modelling process is presented in Figure 1-1. Modelling studies are often an iterative process, and this study is building on the previous work conducted in the WDWCD identified below in section 2.4. The current document details the steps identified in the process: A collation of available data for the WDWCD is presented. The available data is then assessed and interpreted to provide a conceptual model of the groundwater system. The initial design of the groundwater model that will be used in the calibration stages is then described. 1.5. Model classification The groundwater model presented is deemed to be Class 2 using the classification presented by Barnett et al (2012). Based on the objectives of the modelling study this is considered appropriate, notably for the evaluation of a basin scale aquifer over medium and long term (100yrs) response times. Table 1 identifies the classification criteria met by the current model. It should be noted that some of the criteria match a Class 3 model. However, the lack of bore information to the south and north of the main aquifer system, the limitations of the metered groundwater extraction data (i.e. total extraction is available but spatial and temporal coverage is not extensive) and magnitude of pumping during predictions compared to current pumping stresses mean that the model classification has been regarded as Class 2.