Could you help me answer the following question? Thank you The local municipality wants to use this well (the pumping well) as an irrigation water supply well and would like to pump the well at 2000 gal/min. There is a house (Jenny’s) on a well 210 ft away. This pumping would occur in the dry season (assume no recharge) of June, July and August. What would be the drawdown on Jenny’s Well by the end of August. Transmissivity T = 1746.76 gal/min/ft Hydraulic conductivity = 11.645 gal/min/ft2 Storativity = 0.809
Could you help me answer the following question? Thank you
The local municipality wants to use this well (the pumping well) as an irrigation water supply well and would like to pump the well at 2000 gal/min. There is a house (Jenny’s) on a well 210 ft away. This pumping would occur in the dry season (assume no recharge) of June, July and August. What would be the drawdown on Jenny’s Well by the end of August.
Transmissivity T = 1746.76 gal/min/ft
Hydraulic conductivity = 11.645 gal/min/ft2
Storativity = 0.809
Observation well situated is 69.7 ft away from the pumping well (which is pumping at the rate of 305 gal/min). The aquifer is confined, and the depth has been measured from well logs and is 150 ft. The data for time (t) and drawdown (s) is given below:
|
t (min) |
s (ft) |
|
0.072 |
0.003 |
|
0.105 |
0.006 |
|
0.155 |
0.012 |
|
0.222 |
0.02 |
|
0.322 |
0.026 |
|
0.472 |
0.03 |
|
0.688 |
0.034 |
|
1.005 |
0.037 |
|
1.472 |
0.041 |
|
2.238 |
0.047 |
|
3.238 |
0.052 |
|
4.738 |
0.062 |
|
6.738 |
0.072 |
|
10.072 |
0.087 |
|
15.905 |
0.107 |
|
21.905 |
0.116 |
|
31.905 |
0.129 |
|
46.905 |
0.149 |
|
67.905 |
0.171 |
|
100.91 |
0.203 |
|
150.91 |
0.239 |
|
220.91 |
0.276 |
|
351.9 |
0.33 |
|
500.9 |
0.36 |
|
687.9 |
0.39 |
|
1001.9 |
0.43 |
|
1481.9 |
0.46 |
|
2202.9 |
0.49 |
|
3103.9 |
0.51 |
|
4336.9 |
0.54 |
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