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<br />...: <br />I&- 3 <br />z <br /> <br />u 2 <br />>i <br /> <br /> 16 <br /> 115 <br /> 14 <br /> 13 <br /> 12 <br />...: II <br />I&- <br />~ 10 <br />~ 9 <br /> 8 <br /> 7 <br /> 6 <br /> 5 <br /> <br />5 <br /> <br /> ---- <br /> -- -- <br /> -- ...- <br /> --- <br /> .- -- <br /> ./" CRITICAL DEPTH - <br /> ./'" , , , <br /> ./ RECTAtI GULAR SE CTION <br />,/ <br /> <br />, <br /> <br />4 <br /> <br />e <br /> <br />~ <br /> <br />o <br />o <br /> <br />30 <br />JL <br />NB <br /> <br />40 <br /> <br />50 <br /> <br />60 <br /> <br />10 <br /> <br />20 <br /> <br /> 1/ <br /> ~ , <br />f- i.;' <br /> NOTE: Yc CANNOT <br />- <br />- EXCEED TOP OF BOX ~ <br /> / <br /> ./ <br /> V <br /> .J <br /> I' <br /> ~ <br /> / <br /> , <br /> , C,R.ITI~~L DEPTH- - <br /> ~ RECT ~NGULAR 'SECTION <br /> [7 1 I I <br /> , <br /> , <br /> ... <br /> ~ B IN FT. <br /> ,J Q IN C.F.S. <br /> ~ ~ I r ~ 2 <br />~ yc= .315 (~B) <br /> I I I I I I <br /> <br />e <br /> <br />. <br /> <br />.. <br /> <br />4 <br />50 <br /> <br />150 <br /> <br />200 <br />a <br />NB <br /> <br />250 300 350 <br />FIGURE 111-3 <br />CRITICAL DEPTH e <br />RECTANGULAR SECTION <br /> <br />100 <br /> <br />BUREAU OF PUBLIC ROADS JAN. 1963 <br /> <br />1II-8 <br />