) A well of size 6.60 x 4.05 m and depth 4.7 m in the lateritic soil near Mangalore (west coast of India) has its normal water level at 3.825 m below ground level (bgl). By pumping for 1 hours, the water level (bgl) was depressed to 4.525 m and the pumping was stopped. The recuperation rates of the well during 24 hours after the pumping stopped are given below. The total volume of water pumped during 1½ hours of pumping was 28.87 m³ (no well steining is provided)

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Chapter2: Loads On Structures
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DETERMINE: a. Rate of seepage into the well during pumping

(b) A well of size 6.60 × 4.05 m and depth 4.7 m in the lateritic soil near Mangalore (west coast
of India) has its normal water level at 3.825 m below ground level (bgl). By pumping for 1½
hours, the water level (bgl) was depressed to 4.525 m and the pumping was stopped. The
recuperation rates of the well during 2 hours after the pumping stopped are given below.
The total volume of water pumped during 1½ hours of pumping was 28.87 m³ (no well steining
is provided)
Time since pumping
stopped (min)
0
10
20
30
40
50
60
70
80
90
Recuperation rates
120
150
Water level, bgl
(m)
4.525
4.365
4.245
4.135
4.075
4.015
3.985
3.960
3.950
3.935
3.920
3.902
Transcribed Image Text:(b) A well of size 6.60 × 4.05 m and depth 4.7 m in the lateritic soil near Mangalore (west coast of India) has its normal water level at 3.825 m below ground level (bgl). By pumping for 1½ hours, the water level (bgl) was depressed to 4.525 m and the pumping was stopped. The recuperation rates of the well during 2 hours after the pumping stopped are given below. The total volume of water pumped during 1½ hours of pumping was 28.87 m³ (no well steining is provided) Time since pumping stopped (min) 0 10 20 30 40 50 60 70 80 90 Recuperation rates 120 150 Water level, bgl (m) 4.525 4.365 4.245 4.135 4.075 4.015 3.985 3.960 3.950 3.935 3.920 3.902
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