Nov. 12,1917 Effect of Pumping from a Shallow Well 
343 
The profiles showing the water-table curves for 1914, therefore, repre¬ 
sent very nearly normal conditions as they would have been had no pump¬ 
ing been done. 
During 1915 much more complete data were obtained. The observa¬ 
tion wells were measured weekly from the beginning of the irrigation 
season in March until they were all dry in September. The pump was 
run continuously, and daily records were made of the discharge from 
April 3 to August 21, except during about three weeks in June, when 
MARCH APP/L 
AM Y 
JUNE 
JULY 
AUGUST SEPTEMBER 
i 
A 
\ 
1 
! 
\ 
i 
\ 
V 
r~ 
7 
\ 
... 
... 
... 
> 
/ 
*- 
t 
... 
t 
1 
1 
-- 
„ 
\ 
'f 
/ 
w 
\ 
! 
f 
\ 
V 
> 
% 
■ 
r 
, / 
N 
/ 
i 
i 
/ 
f 
r 
\ 
l 
\ 
' \ 
J 9 S 
1 
it 
s' 
/ 
\ 
f 
,/ 
- 
\ 
(f, 
) 
v 
7 ' « 
* 
t 
t 
t 
L 
\ 
r 
N 
~P 
K 
25/2 
250.3 
249.2 
246.2 
247.2 
24€.2 
245.2 
244.2 
25/.5 
250.5 
249.5 
2 + 7-3 $ 
245 5 
245.5 ijj 
244.5 
243.5 
252.0 
25/* O 
250.0 
249.0 
249.0 
247.0 
244.0 
245.0 
244 O 
Fig. 3.— Ground-water curves for 1914 and 1915 (wells 4, 5 - and 6 ). 
the pump was dismantled for repairs. The weekly well readings for 
1915 are plotted with those for the previous year in figures 2 to 8, and 
the daily pump discharge is shown in Table I. The data obtained dur¬ 
ing 1915 have been plotted separately for each month in figures 9 to 15, 
inclusive, showing the slope of the ground water along the different lines 
passing through the sump. 
