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effect of BMPs on Q peak

Posted by Fateme Fallah on November 30, 2011 at 7:52am

Hi,

I have modeled porous pavement with regard to 2 scenarios. In the first scenario I examined the effect of increase the flow (Q peak) on the BMP efficiency. The results showed that the efficiency was decreased when flow increased. That’s ok. But in the second scenario I examined the effect of increase the flow (Q peak) because of change in hyetograph. In this scenario return period & total depth of precipitation is constant. Results showed that when flow (Q peak) increased, BMP efficiency increased. Is it reasonable? Why?

Thanks for your help.

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Replies

  • Fateme Fallah December 1, 2011 at 1:09am

    I mean:

     Efficiency =(Q outfall (before using BMP)- Q outfall (after using BMP))/ Q outfall (before using BMP)

    And also

    efficiency=(Volume outfall (before using BMP)- Volume outfall (after using BMP))/ Volume outfall (before using BMP)

  • Robert Dickinson November 30, 2011 at 7:58pm

    Hi, How are you defining efficiency - the BMP volume removal over the total inflow to the BMP?

This reply was deleted.