A NEW METHOD OF ESTIMATING STREAM-FLOW 
Table . r >l — Summary of constants 
195 
Normal flow constants 
Flood flow constants 
a 
a 
3 
o 
Stream A 
Stream 11 
a 
n 
c 
_o 

Stream A 
Stream It 
Absolute 
value 
Expressed as 
percentage 
Absolute 
value 
Expressed as 
percentage 
Abso- 
lute 
value 
Ex- 
pressed 
as per- 
centage 
Abso- 
lute 
value 
Ex- 
pressed 
as per- 
centage 
S c 
R'i 
R't 
R't 
R\ 
R\ 
R\ 
R'i 
R\ 
R't 
R io. . • • 
+ 108 ±4.0 
+ 0.28 ± .05 
+ 0.21 ± .06 
+ 0.14 ± .06 
+ 0.109± .03. c 
+ 0.84 ± .17 
+ 0.69 ± .11 
+ 0.62 ± .09 
+ 0.58 ± .03 
+ 4.44 ±1.5 
+ 0.81 ± .21 
+96 ±4.0 
+ 0.060± .021 
+ 0.071 ± .024 
+ 0.082± .031 
+ 0.079± .017 
+ 0.790± .088 
+ 0.715± .054 
+ 0.496± .029 
+ 0.269 — 
+0.403 — 
+ 210 — 
0.30 ±0.05 
0.22 ± .06 
0.15 ± .06 
0.117 ± .037 
0.090 ± .018 
0.074 ± .012 
0.066 ± .010 
0.062 ± .003 
0.047 ± .015 
0.00S7± .0022 
0.071 ±0.025 
0.084 ± .029 
0.098 ± .037 
0.094 ± .020 
0.094 ± .010 
0.085 ± .006 
0.059 ± .003 
0.032 
. 0048 — 
0.0025 — 
R'n 
R'n 
R'/t 
R'n 
R'n 
R'n 
+ 1.6 
+ 1.7 
+ 1.9 
+ 1.6 
+8.9 
+4.5 
+ 1.3 
1.7 
1.8 
2.0 
1.7 
1.0 
0.48 
0.14 
+ 1.40 
+ 1.43 
+ 1.61 
+ 1.64 
+ 14.0 
+8.24 
+3.11 
1.67 
1.70 
1.92 
1.95 
1.66 
0.98 
0.37 
Total. 
9.0 p. ct. 
4. 1 p. ct. 
19.0 p. ct. 
29.6 7;. ct. 
Freezing-melting 
Values of G 
an current day for discharges, D' , on preceding day 
constants 
Discharge, D', 
G 
Discharge, D', 
G 
preceding day 
on current day 
preceding day 
on current day 
(Unit = 0.001c.f.s.) 
(Unit = 0.01 in.) 
(Unit = 0.001c.f.s.) 
(Unit = 0.01 in.) 
28 
40 
66 
150 
C=+3.97 ±0.71 
50 
65 
160 
25 
F=+0.457±0.055 
60 
63 
170 
24 
Jtf = +5.19 ±0.07 
70 
60 
180 
23 
7" , = 28° F. 
80 
55 
190 
23 
90 
49 
200 
23 
100 
43 
210 
23 
Ei 
110 
40 
250 
22 
4r- 2.6 
120 
38 
300 
21 
130 
36 
350 
21 
140 
34 
400 and over 
20 
0.0022 of 0.0087. In other words, there is one chance in two that the value 0.0087 
/0 0022 
is correct within one-fourth of itself 
/ 0.0022 1 A 
V -0087 ~ A )' 
Of the constants of Stream A, three are unreal in the sense that they are less 
than 3.5 times their own probable errors, viz, R' 3 , R\, and R\. Of the constants of 
Stream B, R\, R\, and R\ are similarly unreal. The extreme uncertainty in any 
constant for which the probable error has been computed or estimated, judged by 
the probable errors, occurs in the constant R' 3 for Stream B, of which the value is 
0.098 expressed as a percentage, only 2.65 times its own probable error, ±0.037. 
On the supposition that all the errors are accidental in character, there is about one 
chance in thirteen that this derived value, 0.098 for R\ for Stream B, is entirely 
fictitious. 
