Deal with a hypothetical watershed with the following parameters. involve input data setup only,
Subbasin Number | Area (ac) | L (ft) | Lca (ft) | S (ft/mi) | Development (%) | Conveyance (%) |
1 | 1280 | 7000 | 4000 | 20 | 30 | 80 |
2 | 1485 | 9000 | 5050 | 20 | 28 | 80 |
3 | 2045 | 8750 | 4975 | 10 | 70 | 100 |
4 | 1517 | 8230 | 41 1 5 | 10 | 70 | 100 |
5 | 2752 | 10,000 | 6340 | 10 | 75 | 100 |
Assume S = S0 in each subbasin. The infiltration data are as follows:
Subbasin | Impervious (%) | SCS Curve Number |
1 | 20 | 78 |
2 | 18 | 80 |
3 | 52 | 85 |
4 | 55 | 85 |
5 | 60 | 90 |
Problem
Calculate the TC&R coefficients for each subbasin in the given watershed shown in Figure. Assume that the equations listed in Table are applicable and that S = S0.
Figure
Table
Equations for TC & R Method for Houston, Texas
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