SWMM56

Introduction:  This set of blogs uses the 1000 year rainfall/runoff/hydraulics model that you can download at http://swmm2000.com/forum/topics/1000-year-simulation-with-rainfall-in-swmm-5 to show the inner workings of SWMM 5 and by extension InfoSWMM and H2oMap SWMM using a QA/QC version of SWMM 5 with extended graphics.   I always hope that seeing the inner workings of a SWMM 5 feature helps to understand the code, sensitivity and importance of a parameter.   It also helps show sometimes when a parameter is not important.   In this example, we show some of the internal working of the RDII estimation for SWMM5.  Discussion:   There are nine main parameters for estimating RDII in SWMM 5: 1.        Slow response or R1, T1 and K1 2.       Medium response  R2, T2 and K2 3.       Fast Response or R3, T3 and K3 4.       The RDII fl...

Introduction:   This set of blogs uses the 1000 year rainfall/runoff/hydraulics model that you can download at   http://swmm2000.com/forum/ topics/1000-year-simulation- with-rainfall-in-swmm-5  to show the inner workings of SWMM 5 and by extension InfoSWMM and H2oMap SWMM using a QA/QC version of SWMM 5 with extended graphics.   I always hope that seeing the inner workings of a SWMM 5 feature helps to understand the code, sensitivity and importance of a parameter.   It also helps show sometimes when a parameter is not important.   In this example, we show some of the internal working of the Green Ampt Infiltration Parameters over the 100 year period.  Discussion:    Key internal parameters for Green Ampt infiltration are FUMax is the Saturated Moisture Content of the Upper Zone (internal units of feet) F or FTOT in the graph is the Cumulative  event infiltration at start of time interval  (internal units of feet) FU i...