A NEW METHOD OF ESTIMATING STREAM-FLOW 
159 
At the time Solution M was made on Stream A, the flood-discharge formula, 
equation (37), had not yet been derived, hence it was not possible to fix the date 
of beginning the decrease of rate of melting by method (d), page 157, and, as it had 
been found in other cases that method (c) gave practically the same results as the 
other three, it was not used except in doubtful cases because of the labor in- 
volved. Hence on Watershed A for 1913, the date fixed by method (b) at April 11 
was taken as the date of beginning of the period of decreased rate of melting. 
Table 42 — Example of computation of net melting and of decreased rale of melting 
A numerical example from the computations of Solution M is presented illustrating the use of equations 
(64) and (67). 
Date 
1913 
Apr. 1 . . . . 
2.... 
3.... 
4 
6.... 
6.... 
7.... 
8.... 
9.... 
10.... 
11.... 
12.... 
13.... 
14.... 
15.... 
16.... 
17.... 
18.... 
19.... 
20.... 
21.... 
22.... 
23.... 
24.... 
25.... 
26.... 
27.... 
28.... 
29.... 
30.... 
May 1 . . . . 
2 
3.... 
4.... 
5.... 
6.... 
7.... 
8.... 
9.... 
10.... 
11 
(*-28°) 
+ 8 
+ 4 
- 6 
- 2 
+ 6 
+ 10 
+ 3 
- 3 
- 8 
- 7 
+ 1 
+ 5 
+ 9 
+ 10 
+ 12 
+ 12 
+ 10 
+ 10 
+ 9 
+ 9 
+11 
+ 7 
- 9 
- 7 
+ 3 
+ 9 
+ 13 
+ 13 
+ 13 
+ 15 
+ 13 
+ 5 
+ 2 
+ 7 
+ 14 
+ 15 
+ 15 
+ 11 
+ 16 
+ 17 
+ 18 
(( -28°) 0.453 
or 
(i-28°) 8.39 
+ 67 
+ 34 
- 3 
- 1 
+ 50 
+ 84 
+ 25 
- 1 
- 4 
- 3 
+ 8 
+ 42 
+ 76 
+ 84 
+ 101 
+ 101 
+ 84 
+ 84 
+ 76 
+ 76 
+ 92 
+ 59 
- 4 
- 3 
+ 25 
+ 76 
+ 109 
+ 109 
+ 109 
+ 126 
+ 109 
+ 42 
+ 17 
+ 59 
+ 117 
+ 126 
+ 126 
+ 92 
+ 134 
+ 143 
+ 151 
+6 
+6 
+7 
+6 
+7 
+6 
+6 
+7 
+6 
+7 
+6 
+6 
+7 
+6 
+7 
+6 
+6 
+7 
+6 
+7 
+6 
+6 
+7 
+6 
+7 
+6 
+6 
+7 
+6 
+7 
+6 
+6 
+7 
+6 
+7 
+6 
+6 
+7 
+6 
+7 
+6 
Net 
melting 
+ 73 
+ 40 
+ 4 
+ 5 
+ 57 
+ 90 
+ 31 
+ 6 
+ 2 
+ 
+ 
+ 48 
+ 83 
+ 90 
+ 108 
+ 107 
+ 90 
+ 91 
+ 
+ 
+ 
S2 
S3 
98 
+ 65 
+ 3 
+ 
+ 
+ 
3 
32 
82 
+ 115 
+ 116 
+ 115 
+ 133 
+ 115 
+ 48 
+ 24 
+ 65 
+ 124 
+ 132 
+ 132 
+ 99 
+ 140 
+ 150 
+ 157 
Reduced 
net 
melting 
+ 14 
+47 
+72 
+64 
+62 
+47 
+30 
+24 
+ 18 
+ 15 
+ 14 
+ 7 


+ 3 
+ 8 
+ 9 
+ 6 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
5 
4 
3 
1 

1 
1 
1 
1 

+ 1 


+ 14 
+ 61 
+ 133 
+ 197 
+259 
+306 
+336 
+360 
+378 
+393 
+407 
+414 
+414 
+414 
+417 
+425 
+434 
+440 
+445 
+449 
+452 
+453 
+453 
+ 454 
+455 
+456 
+457 
+457 
+458 
+458 
+458 
A-Ai 
+445 
+398 
+326 
+ 262 
+200 
+ 153 
+ 123 
+ 99 
+ 81 
+ 66 
+ 52 
+ 45 
+ 45 
+ 45 
+ 42 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
A-Ai 
0.969 
.867 
.710 
.571 
.436 
.333 
.268 
.216 
.176 
.144 
.113 
.0980 
.0980 
.0980 
.0915 
.0741 
.0545 
.0414 
.0305 
.0218 
.0153 
.0131 
.0131 
.0109 
.00871 
.00654 
.00436 
.00436 
.00218 
.00218 
.00218 
In Table 42, in column (2) are listed the differences between the mean air 
temperatures, t, over the watershed as computed from observations at the stations 
stated on page 150, and 28°. In column (3) are the products of the values in 
