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I am building a worksheet that calculates head loss due to friction in water pipes. I am using the Hazen-Williams equation. The commonly used version of this equation uses mixed units (e.g. ft, inches, gpm), and has several standard coefficients that end up giving the result in feet. When I...

Hi philosophy- I think what RWF7437 is trying to say is that calculating a flow of 1134 and assuming that is "accurate" is incorrect, as neither the calculation methods or the field measurement methods are that accurate. I don't think that entering that exact SCS value into HEC-RAS is wrong...

HEC-RAS. I can't believe I didn't think of that- I've only been using it for 6 years. Thanks for your help. I know that Hydraflow is not longer available as a standalone. Since their website is gone, I don't have access to their user forums anymore. The design flows have to be generated...

Using the standalone versions of Hydraflow Express, Stormsewers, Hydrogragphs. Also had easy access to the Civil 3D extensions, but haven't used them yet. Trapezoidal channel, and the cross-section stays the same for the length of the channel. Due to site restrictions, the alignment cannot be...