Study

Method Used

Depth Range (m)

Fitted Rating Equation

Streamtec 2011

Manning Equation & H-Q measurement

0.0 < h < 0.0.12

Q = 1.752h − 0.007

0.12 < h < 1.0

Q = 9.67h² + 0.03

1.0 < h < 8.5

Q = 2.9066h² + 10.313h − 2.417

RFL 2014

Extrapolation based on the H-Q measurement

0 < h ≤ 0.55

Q = 3.77h^1.643

h > 0.55

Q = 11.64h^3.464

HEC-RAS

1D hydraulic modeling calibrated with measured H-Q

0 < h ≤ 0.5

Q = 3.2778h² + 1.1065h − 0.0071

0.5 < h ≤ 1.2

Q = 12.677h^3.5375

h > 1.2

Q = 20.458h^1.4395