Exercise 4
A well (A) pumping at 900 m3/d is located near a river as shown in the image below. The river penetrates a fractured, permeable, confined limestone. A second production well (B) is located 200 m from the first well. A previous pumping test of the formation at well A yielded a T of 75 m2/d and an S of 0.00003.
Production wells located near a fully penetrating river. On average, the distance to the river in the confined aquifer is 30 m from the pumping well as shown by the red dashed line. a) Cross section showing production well A and the lithology. b) Map view of the well locations relative to the river.
- Compute the well interference (drawdown) that would occur at B when well A is pumped at 900 m3/d for 50 days.
- If during the same 50 days of pumping well A, the well at location B is pumped at 450 m3/d, what would be the drawdown at unpumped observation well C at the end of the 50 days of pumping?