H2OMAP SWMM

Example DUPUIT-FORCHHEIMER APPROXIMATION FOR SUBSURFACE FLOW Model in SWMM 5

Subject:   Example  DUPUIT-FORCHHEIMER APPROXIMATION FOR SUBSURFACE FLOW Model in SWMM 5

 

This example was created from an older SWMM 4 model from 1988 using the SWMM 4 to SWMM 5 converter.  The values for the coefficients in this case are A1 = A3 = 4*K/L^2, A2 = 0, B1 or the exponent or B1=2 or from Appendix X in the SWMM 4 manual from OSU (http://eng.odu.edu/cee/resources/model/mbin/swmm/swmm_6.pdf)

 


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1 reply »

  1. I’m trying to model the interaction of a wetland with ground water but I’m not sure how to calculate A1 (the groundwater influence coefficient) because I don’t know what to use for L (or the location of h1). My guess is that it is some kind of drawdown distance based on the saturated hydraulic conductivity of the soil but my experience with hydrogeology is very limited. Could you please shed some light on the L parameter for me?

    Thank you.

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