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  1. litebox

    HEC-HMS vs PondPack Difference in Peak Flow

    I am using a Tc of 56.64 minutes and the Rainfall distribution is provided by the local code. I am using the 100 Year Storm with 3 hour duration, this data was provided by the city in 5 minute increments for the 180 min duration. I have entered this data in HEC-HMS and PondPack identically.
  2. litebox

    HEC-HMS vs PondPack Difference in Peak Flow

    I am recreating a model I had in HEC-HMS in PondPack (SCS Unit Hydrograph, CN), the runoff volumes are identical between the two, however the peak flows vary up to 4.3%, is this normal? Or should I be getting closer results between both models. I tried using the same Time-Interval/Output...
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