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Problem 4.2 Solution

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CEE345Spring2002Problemset# concretesewerpipe4 ft indiameteris laidsoit hasa sewage(assumethepropertiesarethesameasth oseofwater) owsata depthof2 ft inthepipe,whatwillbethedischarge?Solutio n:Rh=AP=18D2 12D =D4=1:0 ftAssumingn=0:013,wethenhaveQ=1:49nAR23h S120=1:490:013 4(4ft)2(1:0 ft)23 1:00ft1000ft!12=22:8 widewitha slopeof10ft in8000ftisdesignedfora watertemperatureof40 F, estimatethedepthofthe :Assumingn=0:015,Q=1:49nAR23hS120=1:49nb y byb+2y!23S120where,bis thechannelwidthandyis the ow depth600cfs=1:490:015 (12ft)53 y53(12ft+y)23 10ft8000ft!12Solvingthisforywegetthesolu tionsof 4:11ft and5:60ft. Obviously, onlythelatteroneis possible,soy=5 # andsideslopesof1verticalto2 horizontalis designedtocarrya theslopeofthechannelis ,whatwouldbethedepthof ow inthechannel? Solution :Assumingn=0:012AR2 3hb83=Qn1:49S120b83=3000cfs 0:0121:49 0:00112 (10ft)83=1 ,y=b=0:90ory=9 ,Idaho,whenthedepthis 4 :Q=1:49nAR23hS120FirstcalculateAandRhfro mthegiven foundtobeA=300ft2.

Problem set #3 Solutions Problem 4.34 A 10-ft wide rectangular channel is very smooth except for a small reach that is rough-ened with angle irons attached to the bottom of the channel. Water o ws in the channel at a rate of 200 cfs and at a depth of 1:00 ft. …

  Problem, Rectangular

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