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<br />U0184~
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<br />,o-a-u'l8es" ,a--oom-pensating i-ne'I'ease i-n-the,col1e<l tien.area will be
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<br />-e18,s-ential.Withhigher rainf;all and g;r-eaterrunoff the' runof;f area
<br />
<br />can bered,uced and ,naturally the..oppol8itewill h.old for less favor-
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<br />a"M-eeoodiUonl8.
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<br />Methods.of .tr-ea,tment ,to in<lr-e-as-e ,the ",un<:lff,f",H ,intI:> two
<br />
<br />geneial elane,s: '(1) trep.tment,ofthe"soilt0..d-ee,r-ease'Plilrmea-
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<br />bility"and (2-),o<:lvering-the groundwithso~etype of impervious
<br />
<br />.
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<br />hlanke-tor pa vement. Theeffectivene,s'll-of,-eaoh can .beiac reas ed
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<br />DY l8eleoti ngaj,.ea;',for~r-ejlotn:ient whiehhaV'e--anatu-ra I high 'runoff
<br />
<br />pGt-ential", siK;hail--s_,dl'ift,ar-e-as,or-ar,-eal8where, erog ra phi 0
<br />, !' , '
<br />
<br />i nfll;1sn-cefl-f;;lver-incr"eall-edpreci pi taUon.
<br />\ '.' I
<br />
<br />,
<br />" '. ' ..j ,- -'.
<br />ReduQing .18l!lcHpermeabi Ii ty
<br />, I .
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<br />,In-l&rni ,.j;:r--e-at-me.nt,me-th-adl8:" -I8<i>i-lper-m-e-abi,lit-y-is-, cleo l.'eas ed
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<br />.
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<br />-eithe;rb-ym~hanical~mpa-e.ti.on-ot bydispe-r-s-i-<i>n-of-c.-laY'J>lirti c Ie s
<br />thl'O\l-gkus-e-of ohemiQals, Gompaethagbyshe-epfoot rellers or
<br />
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<br />'pneu~act~,:tiU'l'lpe-rs whenth-e'6oi 1.luuiGptimum,or6Hghtl y higher
<br />
<br />meiB-h.1.~een-t~n-t-ca-ng-r"a.t lyr-educepe'1'mea-bil-ityandthul8 increase
<br />,,!'\uloff .:Spe-e,~-i~ati~ns.fo:r ,this,type.Qf-tl'eali-.mentare.a'VaU~ b Ie in
<br />6-t;j,n4arcl.,e-n~ikee~i,ngte:~~$':!l<Rdtieed"notberepeatedhere:" ,'I',O be
<br />
<br />.. ',' "f' , .-';"", '
<br />effe€,tiv-e ,the- s-l!>H,mus-t-have .a-,fai r Iy' high.CQ.atent.-ef,siU and, c lay;
<br />
<br />ae-r,elatively f..ee--Qf'l'Gp-~,'-ay:jd,~aer-eUef:mu$t'.ae.s-uqhae to permit
<br />u-se"ef thehea"Y',-<<:-Q-rr,jpa,et!-it-g.. equipment. ." Wate r.will-Pl'obabl y ne ed
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<br />21
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