The program ONLINE_COLBY calculates the discharge of sands by the Colby [1964] method.
1.
The input data is the following: mean velocity [v], mean flow depth [d], channel width [B], water temperature [T],
bed material size [d50],
and wash load concentration [Cw].
2.
The program is executed in U.S. Customary units [default units].
However, the program can also take SI (metric) units and convert them to U.S. Customary units [during pre- and post-processing].
3.
The input data is restricted in the following ranges:
• bed material size: 0.1 mm ≤ d50 ≤ 0.8 mm
• wash load concentration: 0 ppm < Cw ≤ 200,000 ppm
4.
When specifying U.S. Customary units, the input data is restricted in the following ranges:
• mean velocity: 1 ft/s ≤ v ≤ 10 ft/s
• mean flow depth: 0.1 ft ≤ d ≤ 100 ft
• channel width: 0 ft < B ≤ 20,000 ft
• water temperature: 32 oF ≤ T ≤ 100 oF
5.
When specifying SI (metric) units, the input data is restricted in the following ranges:
• mean velocity: 0.3048 m/s ≤ v ≤ 3.048 m/s
• mean flow depth: 0.03048 m ≤ d ≤ 30.48 m
• channel width: 0 m < B ≤ 6,096 m
• water temperature: 0 oF ≤ T ≤ 37.777778 oF
6.
Input data outside of the given range will trigger an error message and stop execution.