I work in Pennsylvania as well doing land develoepment/ Stormwater. I typically use the Rational Method
The only downside is that for HydroCAD, in order to print hydrographs for BMP, you have to run the critical duration for each storm event. Depending on how you have your duration set up (I...
The reviewing engineer is kind of a psycho and he has asked for this in the past but for smaller designs. My guess is that PM is the trying to avoid that comment by just doing the calc. I honestly think that it's a waste of time I'll probably just grab the area of the sloped region and use the...
I am tasked with calculating the runoff coefficient for a rather large drainage area (50+ acres). Using Carlson Hydrology, I was able to create an index of all the HSGs and their respective coverages. My PM has requested that I adjust my calculations to account for the slope of the regions...
