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rrowe1 (Civil/Environme)
21 Feb 08 11:36
I am learning PondPack. I have a strong TR-20 background and, in general, the ordinances I follow require that TR-20 be used for event hydrograph simulation. The situation I am currently modeling has a system of inter-connected ponds. I know that PondPack has routines for evaluating inter-connected ponds and that using TR-20 to evaluate interconnected ponds is cumbersome. So I want to use PondPack to model this situation. In PondPack's project set-up wizard, under Hydrograph settings, I have chosen Unit Hydrograph (SCS; Others) as the Hydrograph Method and I have chosen TR-20 (as opposed to Default or HEC-1) for Unit Hydrograph Simulation. From what I've read in PondPack's supporting documentation, the only difference between the Unit Hydrograph Simulation methods is the means by which the time step is calculated which determines the shape of the unit hydrograph. Do I have that right? Is this the defining characteristic of the TR-20 method? Or are there other variables in the PondPack routines that I should tweak to be consistent with the TR-20 method? Thank you for your help.
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