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<br />ed to meet the d.emands.of the livestock. <br /> <br />i <br />Suchst6rag~ is designed to <br /> <br /> <br />Ga18~) t <br /> <br />engineer in designillg a stock pond. With these, using mas$ curve or <br /> <br />residual mass tabulation, the engineer can compute the $torage need- <br /> <br />provide cearryover' water from one period!)! runoff to th~ next; how- <br /> <br />ever, if such carry,ove:r'iS1long, the..-lo-s-s,Q-sc..,byevaporationand sceepag.e <br /> <br />may make carry Qvetirt'lpract~-cal. Therefore, periods of minimal <br />runo~t\getieraHyas~bciated with drought conditions will need espe- <br /> <br />. <br /> <br />i:l{ ,;' <br /> <br />cially'~ccurate appraisal in estimating the supply of water 'available <br /> <br />to a proposed stock pond. Propabilitypf high runoff rates also must <br /> <br />be assesseil for safe design of spillways. <br /> <br />'!'wo approaches t<iiHl,stimation of.,t,as'wa1ilH!' 'supp1-y may be con_ <br /> <br />soldered: (1) use of precipitation measurements and precipitation <br /> <br />runoff relations, and (2) direct runoff estim,atioll' ''!'hesetwo <br /> <br />methods will be discuss.ed in_ some detail. <br /> <br />. <br /> <br />Use of precipitation and precipitation runoff relations <br /> <br />Using precipitation and pr,ecipitation runoffl'e'lations in esti- <br /> <br />mating water supply "has had variable success. The success has <br /> <br />been,greatest where the water supply'is from spring _snowmelt, <br /> <br />from areas of uniform and restrictive soil profiles (Krimgold and <br /> <br />Minshall,1945), where the supply is largely!rolrt ground'waterco-r <br /> <br />spring How,. arid where extensive studies have been made of the <br /> <br />runoff relations in the parttieular area. For most of the area of <br /> <br />30 <br />