Response to outstanding issues - ADG1786.25 Dewatering Management Plan_Rev1_07.10.25-compressed · MCU25/0020

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

 

 

 

 

 

Related page
Acad sulfate sods
Contents
— Caloulstor Provided by
— Tools for calculsting the radius of influence and pumping rates and times for dewatered excavations Department of Water and Environmental
— Retated services and information Reguistion
Preliminary assessment of the rackal extent of the cone of depression and pumping rates and times for all ® Print this page
dewatering operations is critical for assessing the risk of disturbing acid sulfate sos in potential acid sulfate
soil areas,
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Broad-scale acid sulfate soil risk maps for several coastal regions of WA are acoessible via Data WA fXng

Empirical methods to calculate the radial extent of the groundwater cone of depression and purnping rates
and times for dewatering operations are outlined in National Acid Sulfate Soils Guidance: Guidance for the
dewatering of acid sulfate soils in shallow groundwater environments [2

Calculator

Input

Length of excavation: 23 metres

Width of excavation: metres
Drawdown required: metres

Aquifer thickness! 10 metres
Hydraulic conductivity: o.0000949 metres/second
Results

Effective pumping radius, R. : 1) metres

Cone of depression radius, Ro 193 metres

Total purnping rate: 9 litres/second

Pumping time required: 1424 hours