I have a few questions about the R,T,K unit hydrograph method for
modeling RDII.

1. In what version of SWMM does this method exist? I have the

2. Is there any documentation that explains how the values of R, T & K
are derived from a set of precipitation and flow monitoring data? I am
looking for an example that gives typical values for each of these
parameters.

3. Once these parameters are determined, how is RDII computed from a
complex hyetograph?


Thanks,

Tom Barnard
tebarn@EPIX.NET <mailto:tebarn@EPIX.NET>