StormShed3G uses two forms of the Unit Hydrograph. When the peaking factor is set to the default value of 484, it uses the following table:
|
SCS Dimensionless Unit Hydrograph |
|
0.0000 |
0.0300 |
0.1000 |
0.1900 |
0.3100 |
|
0.4700 |
0.6600 |
0.8200 |
0.9300 |
0.9900 |
|
1.0000 |
0.9900 |
0.9300 |
0.8600 |
0.7800 |
|
0.6800 |
0.5600 |
0.4600 |
0.3900 |
0.3300 |
|
0.2800 |
0.2070 |
0.1470 |
0.1070 |
0.0770 |
|
0.0550 |
0.0400 |
0.0290 |
0.0210 |
0.0150 |
|
0.0110 |
0.0050 |
0.0000 |
|
|
For user defined peaking factors, StormShed3G uses an equation for the unit hydrograph.
Delmarva Unit Hydrograph
The Delmarva Dimensionless Unit Hydrograph is available only with a peaking factor of 484.
|
Delmarva Dimensionless Unit Hydrograph |
|
0.00000 |
0.11100 |
0.35600 |
0.65500 |
0.89600 |
|
1.00000 |
0.92900 |
0.82800 |
0.73700 |
0.65600 |
|
0.58400 |
0.52100 |
0.46500 |
0.41500 |
0.37100 |
|
0.33100 |
0.29600 |
0.26500 |
0.23700 |
0.21200 |
|
0.19000 |
0.17000 |
0.15300 |
0.13800 |
0.12300 |
|
0.10900 |
0.09700 |
0.08600 |
0.07600 |
0.06600 |
|
0.05700 |
0.04900 |
0.04100 |
0.03300 |
0.02700 |
|
0.02400 |
0.02100 |
0.01800 |
0.01500 |
0.01300 |
|
0.01200 |
0.01100 |
0.00900 |
0.00800 |
0.00800 |
|
0.00600 |
0.00600 |
0.00500 |
0.00500 |
0.00000 |