Reference Document - Acid Sulfate Soil Report 11_2023- OPW23_0189 · OPW26/0094

Document Set ID: 22828362
Version: 1, Version Date: 26/02/2024


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Cone of Depression calculator

This tool can be used to calculate the groundwater cone of depression in potential acid sulfate soil areas.

Last updated: 2 May 2023

Preliminary assessment of the radial extent of the cone of depression and pumping rates and times for all Related page
dewatering operations is critical for assessing the risk of disturbing acid sulfate soils in potential acid sulfate

soil areas

 

Acid sulfate soils

 

Broad-scale acid sulfate soil risk maps for severe! coastal regions of WA are accessible via Data WA Provided by
Empirical methods to calculate the radial extent of the groundwater cone of depression and pumping rates Department of Water and Environmental
and times for dewatering operations are outlined in National Acid Sulfate Soils Guidance: Guidance for the Regulation
dewatering of acid sulfate soils in shallow groundwater environments
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Calculator fwing

Input

Width of excavation metres

Drawdown required: 27 metres

Aquifer thickness'!! 10 metres

 

Hydraulic conductivity: 0.0000949 metres/second

Results
Effective pumping radius, Re 10 metres
Gone of depression radius, R,, 79 metres

Total pumping rate litres/second

Pumping time required 177 hours

Document Set ID: 22828362
Version: 1, Version Date: 26/02/2024