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Two production wells are located at coordinates (500m, 500m) and at (750m, 750m) in a confined aquifer 1000-m wide and 1000 m long. The transmissivity and the storativity of the aquifer are 1000 m2/day and 0.0001 respectively. The first well is pumped for 10 days at 1000m3/day and the second one is pumped at 600m3/day for 10 days. Pumping at both wells started simultaneously. Determine the response of the aquifer for 15 days since the beginning of pumping at an observation bore at coordinates (600m, 500m), and another at (700m, 500m).
Solution:
In WIDE, start a new model by selecting the [File | New] menu option.
Add the grid and aquifer property details by selecting the [Edit | Grid/Aquifer Properties...] menu option. In the Properties dialog add the following data for the two tabs [Note: Select the appropriate aquifer type prior to setting the Aquifer Properties. Certain properties are only enabled for specific aquifer types]:
Add a pumping well by right-clicking (ctrl click for MacOS) on the grid and entering the pumping bore details. Note: A pumping well cannot be positioned directly on a node. This will cause a numerical instability when calculating the node's drawdown. By default, WIDE will relocate the well by 0.1[L] north and east.
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