Laserfiche WebLink
• Hydrology Results <br />Peak Disd~aige <br />l0~year, 24-hour event 9.78 cfs <br />25-year, 24-hour event 13.28 cfs <br />Rsuaff Volume <br />l0~year, 24-hour event 0.76 ao-ft <br />25-year, 24-hour event 1.06 ao-ft <br />Sedimentolo4v -Methodology aryl Assumptions <br />Sediment yield was calculated by SID(7iD} for single storm events and <br />corrverted to annual yields by the following equation: <br />V = R-annual x (Storm sediment yield)x( 1) x 2000 lbs/ton <br />RstoLm SW 43,560 ft /a~Cre <br />FD~ere: V =Annual ~i~++E+*+* Volume (acre ft/Year) <br />• Rannual =Annual Rainfall Factor <br />Rstoim =Single Storm Rainfall Factor <br />Sw =Sediment Specific Weight (lbs/ft3) <br />Annual and storm rainfall factors and csx~ima.,t specific refight are <br />explained in detail uTder SEDCADF Sedimentology Inputs. 'IY~e storm <br />i~*~* yield (tons) is a SEDCAD~ output, calculated as described below. <br />SEDQ~D~ Sediment (~lculations <br />~e ~i~ntology of each warp.~-,r~~ was evaluated by SF:DCAD+. SIDCAD} <br />develops a sediment graph utilizing the Revised Universal Soil Icss <br />Fquatiai (RUSI.E) using a new revised representative length-slope factor as <br />follows: <br />Y = 95 (V X QP) o . 56K(~) (~) <br />Where: Y =Sediment yield in tans <br />V =Runoff volume in acre feet <br />Qp =Peak disc3~arge in cfs <br />K =Soil Elvdibility factor <br />• LS =Representative length-slope factor <br />CP = Oontrol practice factor <br />.~ ..~.~~,..m 14Ra Revised -April 1992 <br />OIPR I/vn <br />