![]() ROPT=0 in the D1 card of the RUNOFF's input file and directly put the rainĭata in the input file according to the instructions of the user's manual forĮ1, E2, and E3 cards. If your study focuses only on the hydraulics of some storms, you may specify Observed data at the existing stations and then assign them to subcatchments. Some people prepare inferred (averaged) rain fall data based on the (hyetograph number) to each subcatchment in the H1 card of the RUNOFF's inputįile. You then decide which subcatchments use which rain gage dataīased on geographical conditions. The first step is to subdivide the study area (catchment) into subcatchmentsĪccording the topography of the area and the water drainage pattern of theĬhannel system. Going to run the RUNOFF Block latter, there are two ways to prepare the rain SWMM can be run by using multiple rain gage data simultaneously.
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