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<br /> <br />- 10.- <br /> <br />Th" fpllpw;ln,g el'ample ,is,. g;i.ven,. using the same watershed inwesternCp.1p;:" <br />ra.dp as ,given pn page 18 pf the, repo.rt citedabpve, in which factpr.s ,A ' <br />th<:ollgh Iltiptal ,,2 ppints. Accprding to. Figurel this area hilS an 'ar;id , <br />envirgpmep.t, ,With the .easily disperse~ spils and mpderate. slope" Tab;Le 1 <br />shpws that.,the apprppriate treatment can include brushcpntrpl, 'liv,est.oc;:]<:, <br />exclusi.on, rptat.ipn-deferred grazing and prpper grazing use, all meas,ures' <br />e;><c;eptbrush "cpntrpl characterized as extensive. Since the majprity pf, <br />treatment ppssibilities are extensive, this level pf treatment and pf <br />ef~ectiveness~re,assumed. Accprding to. ,the numerical rating system pn <br />the chart pf Factprs Affecting Sediment Yield, the ratings in factprs F, <br />G andHare at 'the high sediment yield levels. ' , <br /> <br />On the basis ,pf Table 2, the rating pf this watershed fpllpwing ,treatment <br />wpuld be as fpllpws: <br /> <br />Factprs <br /> <br />Ra tiI!!L <br />, Withput Treatment 'With Treatment <br /> <br />A. Surfac;e gep.lpgy <br />B. Spils <br />C., 'Climate <br />D., Runpff <br />E. TpppgraphY <br />F. Grpund cpyer <br />G. Land use <br />H.. Upland erpsipn <br />T.. Channel erpsipn <br /> <br /> 10 10 <br /> 10 10 <br /> 7 '" 7 <br /> 5 5 <br /> 10 10 <br /> 10 8 <br /> 10 8 <br /> 25 20 <br /> .2 5 <br />Tptal 92 83 <br /> <br />This tptal rat'ing pf 83 with treatment indicates that a management prpgram <br />wpuld place sediment yield in the lpwerlevels pf classificatipn 2 where <br />the sediment yield rating is 1.0 - 3.0 acre feet per square mile. <br /> <br />The time factpr isnpt a part pf the numerical rating system pf Table 2. <br />Hpwever, a realizatipn pf when the apPraised reductipns in erpsipn and sedi- <br />men.tyield will. accrue is impprtant. As a general rule, the mpre arid the <br />climatic envirpnment, the lpnger the peripd between applicatipn pf measures <br />and the ac;hievement pf evaluated results. The elapsed time may range frpm <br />pnlya year pr two. at favprable lpcatipns to. decades under unfavprable site <br />cpnditipns. <br /> <br />.-i <br />