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Is that SWMM is a Black Box model

Posted by susantha shameera on June 19, 2013 at 1:52am

Is that SWMM is a Black Box model ? Can I change the parameters of runoff generation functions of the model to convert the model for regional watershed modelling. I mean when compare with the urban catchment modelling, rural catchments are more pervious and slow response for the rainfall. I think Overland sheet flow of the sub-catchments is defined by the conservation of energy and the momentum but I don't know how the storage unit runoff generation defined. Is that storage unit runoff behave as a function of the water depth at the tank ?

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Robert Dickinson June 19, 2013 at 9:02am

A few suggestions - use Green Ampt infiltration, groundwater and try to breakup your larger subcatcments into smaller segments.

A black box model according to Wikipedia is

In science and engineering, a black box is a device, system or object which can be viewed in terms of its input, output and transfer characteristics without any knowledge of its internal workings. Its implementation is "opaque" (black). Almost anything might be referred to as a black box: a transistor, an algorithm, or the human mind.

so by that definition SWMM 5 is not a Black Box Model as you know what occurs inside and can see the code.
- susantha shameera > Robert Dickinson June 19, 2013 at 10:14pm
  
  Thank You very much Bob

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