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STORMIVATLR Sl7E PLAN <br />11, :1 LP.FOP.D L�D'� <br />EXISTING S1TE HYDROLOGY <br />1[INE 22, 2005 <br />„. <br />I:1V1: IJ <br />EXISTiNG BAS[N 1 <br />'I'liis basin has a[ributary area of 1.43 acres i�� dic cxisting condition. "[�he gruw�d co��cr <br />has becn taken as undisturbed forest. <br />Land Use CN Arca (ac) <br />Trces & Brush 81 1.43 <br />'I�hc flow path for the time of concentration calculation consists of the following: <br />Shcet Fiow (trees) I 88 0.112 25.67 <br />Total timc of conccntration = 25.67 minutcs. <br />Thc cxisting runof'f ratcs arc: <br />Rcturn Period Peak Rate(cfs) Volume(cfl <br />2 Ycar 0.04 1,770 <br />I 0 Year 0.14 3,990 <br />100 Year 0.34 7,830 <br />DEVEL�PED SITE HYDRC�LOGY <br />DEVELOPED BASIN 1 <br />'�his basin has a tributary area of 1.43 acres. <br />The basin has the following developed land uses and �ueas: <br />Land Use CN Arca(ac) <br />Hoases/Pavement 98 094 <br />Lawn 86 0.49 <br />Thc timc of conccutration for this basin is small. For calculations a practical minimum of <br />5 minutes has becn used. <br />"I'he developcd runoff rates are: <br />Rcturn Pcriod Pcak Rate(cfsl Volumc(cf1 <br />2 Ycar 036 5,470 <br />10 Year 0.58 3,760 <br />100 Ycar 09l 13,640 <br />Scc Appcndix C fiir SturmShedT"' basin output. <br />��s.:�., i ...,._..:���.:�-t3��,�1 .oi�nm�os� r� �r,e"�.z��ssrvro•.eno�aooc DWHlsrrr. <br />