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<br />determine how much water must be released. from Hoover Dam within <br />a specified pedod on account of requirements other than irrigation, <br />and then to ascertain from the power allotte:es the desired distribution <br />of such releases by months. If their desire;d. distribution cpnforms to <br />other requirements, the scheduleis set upftccordinglY. Th.en, for each. <br />coming week, the allottees indicate th.Elir doired daily energy produc- <br />tion. at Hoover Ppwerplant. UnleBS the water relea.se needed. for such. <br />generation is insufficient to accomplish. th.e:r equir ed drawdown of .Lake <br />Mead, or is incompatible with some oth.er :r!equirement, it is establish.ed <br />as the Hoover schedule for the week. Th.e licheduled daily Hoove.rreleases, <br />leBS river and reservoir 10BSes, and adjusted for estimated.or scheduled <br />storage changes in Lake Moh.ave and Lake I:!avasu, determine the re- , <br />leases. from Davis and Parker Dams. These releases and stor.age <br />changes are furnished the power dispatching office for schedllling power <br />operations. Releases from Parker Dam are diverted at Imperial Dam <br />and by Mexico as needed, th.e remainder pa.ssing to the Qulf of California. <br />In order to be doubly sure that irrigation r~quirements will at all times <br />be met, orders must be received from wat~r users dudng periods of <br />plentiful water, as well as in low water periods. <br /> <br />This covers the highligh.ts of day-to-4ay water scheduling and <br />dis~tching procedures. The fl.ood control regulations fOl:' Lake Mead, <br />the flood warning radio network in the Bill;WUHams lUverbasin, and <br />the streamflow and weather for'ecasting an!i reporting systemsar.e re- <br />lated operational requirements which timei does not permit dsscribing <br />in detail. <br /> <br />. <br /> <br />. <br /> <br />". <br /> <br />* * * * * ** ** <br /> <br />.. <br /> <br />FORECASt'IN.G THE RUN.OFF IN. THE COLORADO R.IVER BASIN. <br /> <br />Clyde E. Houston, Irrigation Engineer, Soil Conservation Service. <br /> <br />, . <br />Where the supply of water ill limite4. as in the Colorado River <br />watershed, efficient control and use shoulid be attained for .the greatest <br />benefit and economy. Floods destroy crops, erode soil Ol:' cover it with. <br />ster.He sediment, and destroy property. Droughts create fire hazards <br />and power shortages, and retard crop grci-wth. Floods and droughts <br />probably can never be prevented, but we 40 know how to retain much <br />of the precipitation where it falls, to leve~ off flood peaks, and to fore- <br />cast these occurrences 1 to 6 months in advance. A start towards effi- <br />cient contr.ol and use of Colorado River Wiater was passage of the Boulder <br />Canyon Project Act, providing for constrjJ.ction.)>f,storage and diversion <br />works on the lower river. Operation of lj100ver Dam is expected to <br />banish fear of floods or droughts and pro~uce a maximum amount of <br />electrical energy. The handiest tool fomj,d for efficiently operating such <br />multiple use structures is water supply fbrecasting. <br /> <br />t'he gathering and processing of snow and precipitation data basic <br />to water supply forecasting rests nationally with the Soil Conservation <br />Service and th.e Weather Bureau. Last y,eat, 134 snow. COUl:lles on the <br />Colorado R,iver Drainage in Wyoming, Cblorado, Utah,. N.ew Mexico, <br /> <br />.. <br /> <br />" <br /> <br />.,.28- <br />