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Is below method correct way to calculate average BOD ? The facility is presumed to produce residential equivalent strength sewage during daily activities and wastewater with high organic strength and elevated FOG (fat, oil and grease) characteristics during events. This high strength situation...

thanks Sparttan5, it was very helpful

I am designing a pressure drainfield system, and my system performance curve is as follows: gpm head 40 32.27 45 37.03 50 42.28 I have a hard time to select a pump to fit in my system; I tried Myers and Haydromatic Companies products. I need a non-clog pump, the grinder pump from the...

Currently I am doing a commercial site grading and I need a go by plan to clarify some question that I have, do you guys know any site or go by plan on internet that I can download?

thnaks so much

I was wondering how can calculate total discharge time for a detention pond to completely be empty for example after 10 years storm, I am using PondPack for my calculation.

The predevelopment area that produce such a small flow rate is small and I want to discharge my post development basin flow that is from the new building roof's area to the detention pond and then release to the discharge point of pre-development rate, I modeled the basins by pond pack and base...

I am designing a detention storage pond (pipe storage), the pre-development flow rates are as followa: years pre-dev flow rate post-dev flow rate 2 0.0000 0.6733 10 0.001 0.9889 25 0.0245 1.2203 100...

CHECK YOUR 3D POLYLINE WHICH YOU ARE YOU ARE USING FOR GRADINGS, IT MIGHT BE A GRIP WITH ELEVATION ZERO THAT CAUSE THAT PROBLEM, CHECK ALL THE ELEVSATION OF YOUR 3D POLYLINE WITH EDIT 3D POLYLINE COMMAND IN 3D POLYLINE MENU

Hi guys I want to control a commercial roof runoff with an area approxiamte 76815 sf by drywells, the requred storage volume is 7565cf and drywell discharge rate is 0.3cf/s, how i can provide the requred storage without building a swale over drywells with considering the facts that runoff...

I WAS WONDERING HOW CAN CONNECT A WEIR AND AN ORIFFICE TO AN OUTLET IN SWMM.

Thanks for the links, do you know where i can find examples for pond routing using SWMM?

the project is located in native americans property so they are not under any jursdiction, there is a wetland next to property that is under jurisdiction of army corps but the wetland inside property is not protected by any agency, the design that I am doing is not going to be reviewd by any...

yes there water table is 5.5 feet below the existing ground, and in august it raise 2 feet more, actually I don’t believe that we can discharge the water by infilration,but I have not a good reason, because may be we can explain that the infiltration water is flowing with ground water routes...

I decided to include the infiltration to my evaporation pond calculation, which is 0.5 in/day to reduce my pond size that without is 700000 square feet,after applying this reduction, my pond size is 400000sf with a depth about 1.5ft ( with 1 ft free board, total depth 2.5) My question is can I...

hi everybody does anyone know where can i find example applications and samples for getting more familier about this software and procedures? i have already downloaded its manual but i need more practical samples

I am sure that the wetland in the project area is not under any jurisdiction, By studying more I found out that there is a creek nearby, is it possible to discharge the water by a channal to the creek?

The area where water is ponding is wetland and natural low area, but it isn't under any jurisdiction or agency protection and our proposed road is going to pass over it, we are following Spokane County, Washington regulations, Subsurface condition Our exploration generally ecointered 2...

Hi everybody Currently I am designing a drainage system for a commercial site, which is located an rural area without any adjacent buildings, we have no restriction for extending our site, so if we need we can use surroundings lands, but problem is that all the proposed and predeveloped area's...