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i <br /> 1 TASE OF CONCENTRATION FOR: <br /> ( GRF.ENS OF MERRII.L CREEIti <br /> MULTI-HOME COMPLEX <br /> OFFSTfE RUNOFF-EXISTING CONDITIONS <br /> IStKetFiow: T,= 0.42(n,L)o.� <br /> ��o.s���o.� <br /> 1 <br /> qr�; T,: travel time(min). <br /> � n,: shcet flow Manning's EfTective rough��ss coefficient(from Table 3.5.2C). <br /> L: ]ow length(ft). <br /> Pz: 2-yeu,24-hour rainfell(in),(sce Figute 3.5.1 C). <br /> � s�: siope of hydraulic grnde line(land slope,ft/ft). <br /> ( CALCULAI'IONS: <br /> I Sheet Flow: Se�nent#= 1 T�= 1'.6053 min. <br /> M= 0.15 <br /> L= Z8 <br /> � change EI.= 10 <br /> pZ= 1.55 <br /> so= 0.357 <br /> ISegment Il= 2 Ti= 8.0999 min. <br /> ry= 0.4 <br /> ( L 8� I <br /> chenge EI.= 29 1 <br /> ` rZ= �.ssi <br /> I So= 0.363 <br /> I Segment#= 3 T,= 9.0463 min. <br /> ry= 0.4 <br /> L= 8� <br /> ' chenge EI.= 22 <br /> p2= 1.55 <br /> so= 1�.275 <br /> IT<< 18.751 min. <br /> ' <br /> � � <br /> ' Ppe7 <br />