HEC-HMS and the SCS Type II Storm
HEC-HMS and the SCS Type II Storm
(OP)
Hi,
I'm a new user of HEC-HMS and I have been trying to model a basin using an SCS Type II distribution curve. The problem is, the agency requires that I use a 6-hour distribution curve for teh SCS hydrograph instead of the 24-hour distribution curve that is built into the program. I can't seem to find a way to set up my model for a 6-hour SCS Type distribution curve. Is this possible using HEC-HMS or am I out of luck?
I'm a new user of HEC-HMS and I have been trying to model a basin using an SCS Type II distribution curve. The problem is, the agency requires that I use a 6-hour distribution curve for teh SCS hydrograph instead of the 24-hour distribution curve that is built into the program. I can't seem to find a way to set up my model for a 6-hour SCS Type distribution curve. Is this possible using HEC-HMS or am I out of luck?





RE: HEC-HMS and the SCS Type II Storm
RE: HEC-HMS and the SCS Type II Storm
psmart showed me how to load the County's 6 hour distribution data into HydroCAD. I used both distribtuions and the results indicated a higher paek was obtained with the 24 hour distribtion. I presented both results and used the 24 hour storm results for culvert design.
RE: HEC-HMS and the SCS Type II Storm
RE: HEC-HMS and the SCS Type II Storm
RE: HEC-HMS and the SCS Type II Storm
The best thing in HMS for these little storms (less than a 500 or 100 yr event) is using the frequency method and then entering in the data from NOAA Atlas 14 if you are lucky to have it done for your state.
I have to say that at least you ask, I see too much where people abuse NRCS methods than complain about the results.