SWMM5 Culvert Sensitivity Analysis

  • SWMM5 is unsteady state while HY8 is steady state.
  • Upstream/downstream condition is assumed in HY8 and need to be built in SWMM5
  • HY8 only computes using inlet and outlet control equations
  • SWMM5 use the same inlet control but for outlet control it uses dynamic wave routing
  • HY8 implicitly calculates entrance/exit losses based on the culvert type, while SWMM5 explicitly asks for the loss factors


Inlet Setting

  • base:loading directly to the inlet
  • storage:loading directly to the inlet, which is modeled as a storage node
  • channel: loading to a big channel which then flows into the inlet






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