Page 190 - Water and wastewater engineering

WELLS 4-45

Knotquite
1.0 km
50 m 50 m
002 001

100 m

50 m 50 m
004 003
100 m

50 m 50 m
005
N
Proposed new well

Knotquite
Well Field No. 1
Approved:
FIGURE P-4-18
4-19. For the well field layout shown in Figure P-4-19 on page 4-46, 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 100 days and that each well is 0.300 m
in diameter. Aquifer data are shown below the well field data.

Fair Well Field No. 2
3
Well no. Pumping rate (m /s) Depth of well (m)
1 0.020 105.7
2 0.035 112.8
3 0.020 111.2
4 0.015 108.6
5 0.030 113.3
6 (proposed) 0.025 109.7

The aquifer characteristics are as follows:
6
Storage coefficient 2.11 10
3 2
Transmissivity 4.02 10 m /s
Nonpumping water level 9.50 m below grade
Depth to top of artesian aquifer 50.1 m