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<br />19
<br />
<br />
<br />OJ 18 '1 0
<br />
<br />,use when pr....per-&1iGrag.e is i>>-'ov-ided and the water is not wasted.
<br />
<br />I~' neo-e,s&ary ormore~eQl><;.l:niG;al,the ,storag,ecan be provided in
<br />"
<br />
<br />thetl'Gu-gh,u$-ed1;>-y'thelivestGcl<;.,As aue><jample, a trough 3 feet
<br />" '
<br />
<br />wi-de ~y 1 1/2 ieetqeep 'by 30 ,feet longwill held about 1,000
<br />
<br />gallGue ,ecquivalent toa daily yield atl;! .7gpm"ud ,sufficient for
<br />
<br />a he,r,d",of l-OOcattle. ]flOM/ing wells<>f higher yield offer gOQ(f
<br />
<br />"o,ppo,vtuni ties "for expanding, these rvice,area b-y,u"5eo.f,~ Ii ne
<br />
<br />.
<br />
<br />o-rh",u-Ung.
<br />
<br />~velope-d--rufl:(}ff areas,
<br />
<br />F_vtdings-tGck,waterby increaeing. ruu<>ff through treat-
<br />
<br />mElnt of land "eu'l'f-ace' h",s beenpl!'ac:ticed in,ali,mitedway for many
<br />
<br />ye,ar-s. The use ofdsterns whieh.,eatch the runoff from houses,
<br />
<br />hluns,and Gtherbui-ldi-ngs"or the--captU:J:Iin-g--and.etoring of run-
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<br />'Gfff-ron'},reacbes-,<,>-f.pa,vedr-oads .ol!'otherimpe rviouss)1 ,face s '
<br />
<br />.
<br />
<br />. , are--<!l,O:mm~neiGampIe.sof,-the pra<;;tite. Development in recent
<br />, , - ' ,
<br />
<br />year,s-....f,-Gthe r-rriethods,o-f"making ,the. tand.surfaceimpe rviou s
<br />, ,
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<br />hasaddeil,.,tethe'pl'eu:,Ucabi lity ,,,{u.long thisappreach.
<br />
<br />oV,er--,much'-Gf the,~a-nge't"'ndin-the .:PacHi-c,~thwes-t area,
<br />
<br />,gal-face ruB6ff_the-a'J'era-gerep,:J:IeSents'appro",imate Iy 10 per-
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<br />cent--Gf':the ,t{)taCp-:J:Ie<>ipua,ti:en. 'On the drier r-ange land;s, where
<br />
<br />pI1Gviding.-stejlik, water ,is"often-a,critica l'problem-. ." theperc entage
<br />
<br />of runoff l'nli:y hi;J even,wwerb.ecauseoLvar:y_p.ervious soil or
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