Table 2.
Regression coefficients and diagnostic statistics for discharge ratings
[equation: Q
= B_{1} + B_{2}V + B_{3}S, where Q is estimated
discharge in cubic meters per second; V is measured velocity in centimeters per
second; and S is stage in meters above (+) or below (-) the mean stage measured
during the hydrographic survey; p-value, attained significance level; R^{2},
coefficient of determination (variability in the measured discharges explained
by the equation); RMSE, root mean square error (square root of the mean of the
squares of the regression residuals) in cubic meters per second; n/a, not
applicable. Stage not in regression because identical discharges were recorded
for two different stages (loop rating).]
Site name |
B_{1
}(p-value) |
B_{2
}(p-value) |
B_{3
}(p-value) |
R^{2} |
RMSE |
GIW at State Highway 87 |
+29.37 (0.001) |
2.74 (<0.001) |
n/a |
0.93 |
26.4 |
Sabine River |
-153.4 (0.003) |
21.97 (<0.001) |
n/a |
.96 |
91.3 |
Black Bayou |
-1.72 (0.734) |
1.20 (0.010) |
-256.2 (0.029) |
.98 |
5.6 |