Never used HY 8. My comment on road info.
I guess it need that for check storm, say 100 year storm, when the road will be flooded but act as a weir for water to pass overtop. the overtop capacity is required by authority? Not sure.
I heard SWMM can do that, but how? I found in SWMM you could input decay coeff. for pollutants, that’s OK for BOD /COD, but for SS, I don’t think it works that way. To my knowledge, I would expect somewhere to input the geometry, flowrate, particle size distribution, settling speed etc. but...
Hi there,
I was using PondPack, but with SCS unit hydrograph method. I remember the included tutorial was based on Rational method. I would use modified rational method rather than the one you were trying. The former is simpler to use, I guess. Their purpose are both transforming a single...
Hi,
I am going to use SCS method to size a detention pond. The problem here is, the rainfall data is in IDF curve format (A,B,C constants available). No guage data. I was told IDF curve can be transformed to depth vs. time curve, for a given distribution type, eg, Chicago.
Anybody knows how...
