SCS Unit Hydrograph
SCS Unit Hydrograph
(OP)
I have seen several reports that refer to a calculation method called the SCS Unit Hydrograph. Is this the same as the Tabular method, or the graphical method as described in the TR-55 manual, both, or something completely different?
Thanks
Thanks





RE: SCS Unit Hydrograph
RE: SCS Unit Hydrograph
The TR-55 Tabular Method is derived from TR-20, and is designed to approximate the runoff hydrographs that would be obtained with TR-20 itself. TR-55 does't use the UH directly, since it is already embodied in the TR-20 results that it employs. For details see http://www.hydrocad.net/tr-55.htm
A number of hydrology applications, such as HydroCAD, employ the actual SCS runoff procedure, making it easy to use a different UH if required for special applications. For details see www.hydrocad.net
RE: SCS Unit Hydrograph
This covers the engineering and science behind the unit hydrograph. Type in a search engine and you can download a copy. It is sometime listed as NEH 4