I'm agree with Francesca, negative increases or surcharge may occur in the floodway computations due to constrictions that increase the velocity in the point of analysis. Similarly, extremely short elevation increase can be taken as unacceptable. The following conditions may create negative...
The goal of detention pond is attenuate the pick discharge by means of detention volume caused by development. If we suppose that your detention pond will not within floodplain, but your outlet discharge to AE zone, once the WSE reach the BFE your pond will not mitigate the discharge.
Due to...
HEC-HMS provide several options to calibrate the meteorologic mode. One of them is precipitation frequency storm. This method provide the option to specify the precipitation for 5-min, 15-min, 1-hour, 2-hour, 3-hour, 6-hour, 12-hour and 24-hour. Using this data, I have modeled a watersheet with...
I'm modeling a watersheet using Hydrocad software to determine the increase outflow due to a development. The local regulation require the use of precipitation frequency data obtained from NOAA. How I model 24h storm using frequency storm data?
I am using HEC-HMS to model a watersheet. All is ok with the software until I want to printout the results. I tried several procedure encountered but not work. I found information on HEC webpage, but the information provided does not shown arranged procedure to make a printout of the results...
I tried to make similar model to analyst a watershed using two different software (HEC-HMS and Hydrocad) to verify the results. In most case the result are not equivalents. I can use an equivalent curve number on Hydrocad to obtain similar results?
