Territory Stories

North Bathurst Island Groundwater Assessment



North Bathurst Island Groundwater Assessment


Woltmann, Melissa

Issued by

Northern Territory. Department of Land Resource Management


E-Publications; PublicationNT; E-Books; Report 15/2015




North Bathurst Island


A hydrogeological investigation was undertaken in 2014 as part of a broad assessment of the natural resources in the North Bathurst Island area. This information is intended to provide a basis for the assessment of the suitability of the area for horticulture or other developments. The focus of the groundwater study was to characterise and elucidate the shallow unconfined aquifer hosted in the Van Diemen Sandstone, with some scope to investigate the deeper confined aquifer within the Moonkinu Sandstone. This report details the findings of the study.


This report has two volumes - Volume 1 Main report and Volume 2 - Appendices; Made available via the Publications (Legal Deposit) Act 2004 (NT).

Table of contents

Executive summary -- Introduction -- Hydrogeology -- Geology -- Aquifer Occurrence and Extent -- Aquifer Parameters -- Groundwater Movement and Recharge -- Water Quality -- Bore Yield Potential -- Conclusions -- Recommendations -- References




Hydrogeological investigation; Van Diemen Sandstone Aquifer; Moonkinu Sandstone

Publisher name

Northern Territory Government

Place of publication



Report 15/2015


2 volumes : colour illustrations and maps

File type





Attribution International 4.0 (CC BY 4.0)

Copyright owner

Northern Territory Government



Related links

https://hdl.handle.net/10070/457837 [North Bathurst Groundwater Assessment - Volume 1 - Main Report.pdf]; https://hdl.handle.net/10070/457838 [North Bathurst Groundwater Assessment - Volume 2 - Appendices.pdf]

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17 For each of the three sites, test pumping included: Stepped-rate testing: 3 rates at 100 minutes each, for a total of 300 minutes Constant rate testing: 1 rate for 1440 minutes Observation bore(s) loggers recording drawdown at 5 minute intervals. The test pumping field report including analysis plots is detailed in Appendix C. Table 2 details the setup and monitoring configuration at each of the sites. Antecedent conditions to testing Tidal movement is indicated to impact the groundwater levels within the study area. A plot of Site 1 water level observations collected from RN38708, presented in Figure 2-8 provides a good example of the dynamic effects of tidal under-printing. The magnitudes of the effect were less for the other two sites. Insufficient antecedent water level data was collected to enable correction for tidal impacts. This resulted in noisy late time data which was not appropriate for use in the type curve matching analysis. However, reasonable curve matching was still achieved for the early response constant rate data. The stepped rate test data from RN38198 (Site 3), the least impacted by tides, provided the data with most clarity for assessing well bore efficiency.

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