WSP02020

• File Number: 8027
• Description: Section D General Correspondence-Federal Agencies
• State: CO
• Date: 10/1/1967
• Author: CT Jenkins
• Title: US Department of Interior-United States Geological Survey Water Resources Division and Quality of Water Branch-1967-1968-Techniques for Computing Rate and Volume of Stream Depletion by Wells
• Water Supply Pro - Doc Type: Report/Study

Part (2)

If pumping is stopped at the end of 78 days,

"

then

t T/a2S = 0.15,
-g- - -

and 30 days later,

(t + t.) T/a2S
-p -1 - - -

= 108 days =
520 days

0.21.

From Figure 2: if
t T/a2S = 0.15
-g- - -

and

~
o
if:
C.

(!p + !!! TJt;.2~ = 0.21,

q/Q = 0.12,
- -

q = (0.12) (2 acre-ft/day) = 0.24 acre-ft/day,
-

30 days after pumping stops.

From Figure 3:

.:!1/9lE. = 0.008,
~ = (0.008) (2 acre-ft/day) (520 days) = 8.3 acre-ft

of stream depletion during 108 days as a

result of pumping 2 acre-it/day during the

fir s t 78 days.

22