Page 191 - Water and wastewater engineering

4-46 WATER AND WASTEWATER ENGINEERING

Proposed
N new well
300 m

300 m 150 m
5 150 m

300 m
4

150 m
300 m
3 150 m
300 m
2
150 m
300 m
1

Fair Well
Plant Well Field No. 2
1.5 km
Approved:
FIGURE P-4-19

4-20. What pumping rate, pumping time, or combination thereof can be sustained by the
new well in Problem 4-19 if all of the well diameters are enlarged to 1.50 m?
4-21. For the well field layout shown in Figure P-4-21 on page 4-47, determine the effect
of adding a sixth well. Is there any potential for adverse effects on the well or the
aquifer? Assume all the wells are pumped for 180 days and that each well is 0.914 m
in diameter. Well data are given in the table below. Aquifer data are shown below the
well field data.

Bode Well Field No. 3
3
Well No. Pumping rate (m /s) Depth of well (m)
1 0.0426 169.0
2 0.0473 170.0
3 0.0426 170.0
4 0.0404 168.0
5 0.0457 170.0
6 (proposed) 0.0473 170.0