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Local agency wants the calculations for a Low Flow rip-rap channel in my Dry Detention Pond. How to you incorporate\model this in the pond calcs.

Where do you find these requirements for the program: • Aquifer Base Elevation • Horizontal Conductivity • Vertical Conductivity • Fillable Porosity Is this something that has to be requested from a Geo-technical Engineer?

Does Hydrocad use the Saint-Venant equation (full dynamic wave)?

Trying to model a floating skimmer device and not sure what flow to input in HydroCAD. Per the skimmer manual I will need two 6 inch skimmers w/H=0.417. The Basin volume needed to drain in 72 hours is 226,357 cuft. I have phase in depth set at 0.42 ft and Full flow set at 1.03 cfs.

I have an existing pipe that is flowing into a large wetland(31 cfs), we are building a new detention pond that I would like the existing pipe to flow into but the pond not hold or account for this flow (free flow through the ponds outlet). Is there any way to use hydrocad to allow this flow to...

Can HydroCAD model inverted pipe flows? If, so then how?

Was wondering if anyone had any suggestions for a road/parking design for beach front property? Will be putting #57 stone down for driving areas, but was wondering about the structural aspect of the road, would you use a geo-grid or something under the rock?

Any suggestions on a problem with corregated plastic storm drain pipe floating? I have 12" To 18" of cover(per manuf. specs.) and the ground water is approx. 3' below the IE of the pipe, its been in the ground since 2001. Looking for any solutions or similar experiences and corrections.

I have two subcatchments DA1 & DA2 , DA1=4.97 cfs and DA2=6.44 cfs, I have both areas routed thru a link to give a combined flow offsite, but the link, gives a total of 8.66 cfs. The total flow should be 11.41 cfs offsite.

The local agency has required that we use a shape factor of 323, how do you change this factor in Hydrocad?