A NEW METHOD OF ESTIMATING STREAM-FU >\V 
101 
Date 
1911 
Jan 
Feb 
Mar 
Apr 
May 
June 
July 
Aug 
Sept 
Oct 
Nov 
Dec 
1912 
Jan 
Feb 
Mar 
Apr 
May 
June 
July 
Aug 
Sept 
Oct 
Nov 
Dec 
1913 
Jan 
Feb 
Mar 
Apr 
May 
June 
July 
Aug 
Sept 
Oct 
Nov 
Dec 
Totals 
1911-1913 
Observed 
rainfall 




71 
214 
437 
311 
241 
410 







203 
403 
158 
37 
171 






39 
300 
221 
224 
261 
91 
108 

3900 
Computed 
net 
melting 
+ 194 
- 9 
+ 448 
+ 1009 
+ 1110 




+ 11 
+ 89 
- 74 
- 15 
+ 7 
+ 93 
+ 467 
+ 927 




6 
76 
70 
+ 
+ 
- 65 
- 18 
+ 154 
+ 1087 
+ 232 





68 
81 
+ 
+ 5646 
( lomputed 
E„ 
42 
23 
83 
73 
151 
165 
79 
129 
90 
81 
45 
35 
42 
44 
32 
63 
149 
126 
123 
131 
128 
75 
69 
34 
33 
33 
49 
85 
147 
109 
148 
113 
68 
73 
41 
23 
2914 
Observed 
run-off 
31 
28 
29 
47 
161 
49 
33 
31 
29 
99 
43 
36 
34 
31 
34 
50 
294 
96 
50 
39 
34 
38 
35 
34 
33 
29 
32 
57 
102 
69 
38 
27 
28 
31 
29 
29 
1889 
shown, the total computed net melting was negative; for instance, — 0.09 inch in 
February 1911. 
EXAMPLES OF NORMAL EQUATIONS FOR NORMAL STREAM-FLOW 
There have been presented up to this point general definitions and specific 
illustrations of the meanings of all of the quantities which enter into the observation 
equations for determining the normal stream-flow. 
In each least-square solution for determining the normal stream-flow equation, 
a set of normal equations was first formed in the usual way from the observation 
equations for each day. Then these sets of normal equations, one set for each 
month, were combined by addition to form the final set of normal equations for the 
whole solution. 
