272 
Journal of Agricultural Research 
Vol. XI, Xo. 6 
Table XI .—Typical heavy storms and probable actual run~off of all districts —Contd. 
JEFFERSON DRAINAGE DISTRICT NO. 3, FEBRUARY, I ^-DECEMBER, I 9 r S a 
Date. 
Rainfall. 
1914. 
Feb. 1?. 
Inches. 
28. 
3- 19 
Wet. 
Mar. 1. 
2. 
2 < . 
4. 70 
Dry. 
1.30 
26.* . * . . 
27.. 
28 . 
20. 
* ^ 
Apr. 10. 
4*32 
Dry. 
5.00 
Satu¬ 
rated. 
20. 
19*5- 
Oct. 12. 
x&. ... 
*T* .. 
May 
Date. 
Apr. 24, 
25- 
26. 
22 . 
„ 2 3 ' 
Sept. 13. 
14. 
I 5 < 
16. 
l 7 ' 
18. 
19. 
Feb. 13 
14 
1914. 
Rainfall. 
Inches. 
2. 76 
•47 
Moist. 
3.00 
Dry. 
2.00 
4.05 
Wet. 
3*. *9 
Moist. 
Run-off. 
Inches. 
0-34 
.42 
.41 
. 64 
•39 
.70 
i-15 
1. 02 
•77 
•39 
. 00 
.87 
•49 
Run-off. 
Inches. 
o. 17 
I. 02 
•65 
• 5 i 
I. 12 
•49 
I. IO 
. 20 
•05 
I. 17 
.01 
*• 7 $ 
•35 
LAFOURCHE DRAINAGE DISTRICT NO. 12, SUBDISTRICT NO. 3 & 
Apr. 18. 
19. 
20 . 
21. 
Nov. 13, 
14. 
1914. 
i 5 ' 
16, 
26 
27. 
4.68 
Dry. 
5- 25 
Moist- 
dry. 
4- 57 
Wet. 
i-35 
. 62 
. 10 
. 00 
1.30 
•34 
• 19 
1. 62 
Nov. 28, 
29. 
3 °- 
1 9 I 4* 
Jan. 23 
24. 
25 ' 
Feb. 4. 
5- 
6 . 
I9I5- 
2 - 55 
Wet. 
1. 88 
Wet. 
94 
41 
25 
I.05 
.20 
. 00 
67 
12 
“ From February, 1913, to December, 1914, of all of the storms of over 2 inches, 5 occurred on dry land 
and 9 on wet land; of those of over 4 inches, 3 occurred on dry land and 2 on wet land. 
b From December, 1912, to December, 1915, of all of the storms of over 2 inches, 6 occurred on dry land 
and 11 on wet land; of those of over 4 inches, 3 occurred on dry land and 3 on wet land. 
CONCLUSIONS 
Owing to differences in the degree of wetness of the land, the intensity 
of the rainfall, the time of the year, the condition of the drainage chan¬ 
nels, etc., the results for any particular district are not uniform. How¬ 
ever, to make it possible to judge what run-off would occur under average 
conditions the results in the tables have been shown in curves (fig. 1-4). 
The amounts of the run-off (in inches of depth) for one, two, three, and 
four day periods have been plotted as ordinates and the rainfall (in 
inches for each storm) as abscissas. Distinctive lines have been drawn 
through the points representing the run-off for each length of storm 
period. Each curve has been drawn, so far as practicable, to average 
these points and at the same time to conform to the other curves. With. 
