Table 2.  Regression coefficients and diagnostic statistics for discharge ratings

[equation: Q = B1 + B2V + B3S, 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; R2, 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

B1
(p-value)

B2
(p-value)

B3
(p-value)

R2

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

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