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<br />"0 (' !::. '." <br />l.i;)U <br /> <br />Depletions caused by Granada Reserveir <br /> <br />Oporation cf the Granada Reservoir would result in some depletion <br />to Arkansas River flows by reason of increased use of water. Tho total <br />average annual depletion would equal the water diverted to ~torage in <br />Granada Reservoir minus the return flows from tho increased irrigation <br />use. This is shown in the follm'ir.g +abuln.ti?r., <br /> <br />Acre-feet <br /> <br />Replacement for increased water use by Trinidad <br />Projoct. .. . . . . . C III ~ 0. . . . 0 " . " . (\ ~ . <br />Evaporation from permanent fish pools: <br />John Martin Roscrvoiro ~ ~ n _ . . . . . . . . ~ <br />Granada Roservoir. . . . . . . . . . . . . . . . <br />Total fish pool ovaporation . . . . . . . . <br />bther evaporation frb~ Granada Reservoir . . . . . <br />Additional irrigatioh use: <br />Additional diversions. . . . . . . . <br />Increased return flow. ~ . . . . . . <br />Net irrigation depletion. . . . <br /> <br />Total probable Project depletion. . . <br /> <br />. . . <br /> <br />2,400 <br /> <br />800 <br />900 <br />- <br />. . . . 1, 700 <br />. . . . 3,400 <br /> <br />. . i . . . 19,000 <br />. . . . . . -7,600 <br />. .. . .. . . . . . .llj 400 <br /> <br />. ., . . . . . . . .18,900 <br /> <br />The depletion would be greatest in years having large flood flows <br />and lowest during the y.oars of low flow. No attempt has boen made to <br />evaluate the channel losses and the possible salvage of a portion of <br />such lossos by operation of a Granada Roservoir. Such salvage' of channel <br />losses 1IOuld reduce the depJc tion figures shown abovo. <br /> <br />The net affect of the Granada Reservoir Project depletions on the <br />groundwater reservoir at the site of the proposed Ingalls Project would <br />probably be of minor importance, and considerably less than the rB$~OO <br />acre-feet annually estimated above. This conclusion is based on the <br />fact that the annual average dopletions result largely from the use of <br />the Granada Roservoir during years of high floed flews. During such <br />years the flows passing in the Ingalls pump area would also.b e large <br />and the reduction in infiltration to the underlying aquifer, because <br />ef the Granada Reservoir operation would be negligible. A large part <br />of the recharge of the acquifer is derived from precipitation on the <br />surrrounding upland areas. <br /> <br />AGRICULTURE <br /> <br />The increased irrigation water supply of 19~000 acre-feet annually <br />provided by the Granada Reservoir Project would be utilized by the <br />existing irrigation systems between the John Martin Reservoir and Garden <br />City, Kansas. <br /> <br />- 7 - <br /> <br />