Dewatering Management Plan

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

 

Contents

— Calculator

 

— Tools for calculating the radius of influence and pumping rates and times for dewatered excavations
— Related services and information

 

 

Preliminary assessrnent of the racial extent of the cone of denression and purigeng rates and times for all
dewatering operations is critical for assessing the risk of disturbing acid sulfate sovts in potential acid sulfate

soil areas.

Brogd-scale acid sulfate sol nsk maps for several coastal regions of WA are accessible vis Data WA.

Empirical methods to caloulate the radial extent of the groundwater cone of depression and purnping rates
and times for Gewaterng operations ar¢ outlined in National Acid Sulfate Soils Guidance:

dewatering of acid sulfate soils in shallow groundwater environments 2.

Calculator

Input

Length of excavation:
Width of excavation:
Drewelown required:
Aquifer thickness!" =

Hydaulic conductivity:

Results

Effective purnping radius, A. :
Cone of depression radius, Rio
Total purnping rate:

Purnguing time required:

 

10.0000949

Dore d

 

metres

metres

metres

metres

metres/second

metres
metres
litres/second

hours

ance for the

Related page

Acid sulfate sods

Provided by

Department of Water and Environmental

iy