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<br />'\'-e~cc:.~:. <br /> <br />T'"!e final :looc.'\'rt;-' Fust convey t:te lOO-year discharge 'f\'ith <br />'.-eloci,ies that \,"ill not cause excessive scouring and erosion. <br />The ground co\"er, soil type, shape and size of the cha.nnel, <br />~:-:?_~-:e~ :-,e:=~:-::jer, tY~J2 c= f2ocd'..,'3.Y fringe fill material, and <br />s:opes ir: the study area should be con5idered \\~hen deteY!T1ining <br />-'...e .,---:;.....1....,......-' 211,,'-~~1~ \'~~n-i"--':""c:: t:'l'c--:'rc.::' (Ret'erence 6; CO" 1--e <br />l..: .:,,-.' ...~-L" _____'.'".~.l..... t:'.l._L~l-.Lc~, 1 _c......... ~. .. "a..... '-' <br />. , <br />the maxir:-,LrI! alloh'able velocities <br />The flOh' distribution option of <br />~c=~= '.-~:::i:i2S to check the <br /> <br />':,:::_~ '::: :~ ~-,_:i~c' ::-. -:e:e:T',inlni: <br />~~: ;,-:rsis;:'1t, wi::cm chan.:'Lels. <br />'----!'C,'-_ i -?.\' .~,--::. ':,-::ec -::C' -="7:2:--:-'::7;(" <br /> <br />~.:':.~~::.::.a.l <br /> <br />0= :ill c3terial. <br /> <br />Suggested Ha.:xilm.F.1 Permissible Mean <br />Channel Velocities <br />In Straight, Uniform ChaTh,els <br />(Reference 6) <br /> <br />Channel l';aterial <br /> <br />~Jean Cha.nnel <br />Veloci ty, fps (Vu) <br /> <br />2.0 <br /> <br />Fine sand <br /> <br />C:::2Tse sc..:.::1 <br /> <br />4.0 <br /> <br />?:r::e g~~&Ye:;'; <br /> <br />6.0 <br /> <br />Earth <br />Sandy silt <br />Silt clay <br />Clay <br /> <br />2.0 <br />3.5 <br />6.0 <br /> <br />Grass-lined earth <br />Berouda grass - sandy silt <br />- silt clay <br />Kentuch1 Blue Grass - sandy silt <br />- si It clay <br /> <br />6.0 <br />8.0 <br />5.0 <br />7.0 <br /> <br />Poor rock (usually sedimentary) <br />Soft sandstone <br />Soft shale <br /> <br />10.0 <br />8.0 <br />3.5 <br /> <br />Gooj Tack (usually igneous or hard metamorphic) <br /> <br />20.0 <br /> <br />~;;::T S:~';;.',,":?~ ~::'~-i=2:- ::-,::=,J: :>/-.4", see Plate =9 of Reference 6. <br /> <br />Figure 5 <br />6 <br />