modelling urban catchments

[Anonymous]

Hi all,
I’m hoping someone could help me with this. I’m trying to build a model for a small urban catchment of approx 50 ha. This catchment discharges into a creek tributary (stormwater tailout channel) which eventually joins the main creekline. Now as for boundary conditions what options do I have? the flows at the d/s end of the catchment are known although that does not help. There is no u/s boundary condition that I could use. This is an urban catchment which does not receive flows from any u/s source. I would just like to model the rainfall that lands on to this catchment so basically I want to map the overland flow paths. I hope the above makes some sense.
Is it possible to model the above scenario? Is it possible to model overland flowpaths at all (not mainstream flooding from a creek/river)?
Thanks a lot for your time,
Much appreciated.
SD

[Lonnie A]

Since there isn’t a rain on surface option…yet…what might work is to set a inflow hydrograph along the upstream side of the catchment for a trial run. Then look at the mapping and determine where the flow concentrates in the surface. Then reassign your upstream inflow hydrograph to generally coincide with the concentration. might get you close to what you want

[Author]

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