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I am modeling a proposed watermain extension into an undeveloped area in the County and need to anticipate fire flow demands to size the watermain extension. Are the flows listed below resonable? Multifamily 1,500gpm Light Commercial 1,500gpm Heavy Commercial 2,000gpm Light Industrial...

National Engineering Handbook Section 4-Hydrology, USDA Soil Conservation Service, 1972 This covers the engineering and science behind the unit hydrograph. Type in a search engine and you can download a copy. It is sometime listed as NEH 4

I use Hydroflow every week and I am very happy with the cost and performance. It will do a lot for the cost compared to Haested. Great tech support also.

I would agree with bltseatle. In North Carolina we use HDPE storm drainage pipe fairly regularly. NCDOT has approved HDPE for use within their right-of-ways. The structural strength for HDPE comes from the pipe bedding conditions and backfill material and methods, therefore the engineer...

We use Hydroflow Hydrographs in our office and it does a good job on Hydrographs and Ponds. However, it does fall short in the underground stormwater management scenario. It will not analyze a network of pipes at different elevations(Haested will not either and it cost 20 times what Hydroflow...

Does anyone have or know of a program to calculate the volume of a circular pipe on a slope in user definable increments. Our office is developing a spreadsheet to do this but it is turning into a lot of work. This would be used in calculating a stage-storage curve for routing an underground...