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<br /> <br />-';.! <br /> <br />"Rio Grande at Otowi. The existing station is to be improved <br />by diverting arroyo flows which now deposit sediment at the <br />control; <br /> <br />"AreaMCapacity Data M Reron No. 4 Reservoir. Reliable areaM <br />capa.city curves are'to be prepared from topographic maps to be <br />done. by photogra.nn:netric methods to a scale of 1" ~ 1,000 feet <br />wi th a 5Mfoot contour interval, In ora.er to account for change <br />in storage, an adequate reservoir level gage will be maintained. <br /> <br />"AreaMCapacity Data - El Vado Reservoir. So that ;veleases of <br />imported water may be routed properly through E1 Vado Reser- <br />vOir, new area-capacity curves will be prepared to the same <br />standards as those for Heron No. 11. A recording reservoir <br />level gage wil~ be installed to measure the entire range of <br />reservoir stage.. This gage will repl.ace the existing. record- <br />ing gage which covers only a portion of the reservoir stage. <br /> <br />"Area-Capacity Data M Abiquiu Reservoix:, <br />data are to be secured for this reservoir <br />reservoir level gage will be maintained. <br /> <br />Adequate areaMcapacity <br />sHe. An adequate <br /> <br />"A;Ppraisal of Chanr~l Losses - Rio ~. <br />are to be used to develop a procedure for <br />channel losses. <br /> <br />Three main methods' <br />estimating present <br /> <br />(1) Consumptive use by reaches .willbe estimated by analysis <br />of graphs of daily gains and losses 'between successive gaging <br />stations. <br /> <br />(2) Complete aerial photographic coverage will be obtained <br />from Heron No.4 Reservoir to the mouth of the Chams. of all <br />areas influenced by Rio. Chams. flows. This will include the <br />tlood plain and all lands irrigated by diversions from the <br />main stem of the Rio Chams.. An analysis of land culture <br />will be made and the present consumptive use of the flood <br />plain and irrigated landsestima;ted. <br /> <br />(3) Seepage:runs will be made for various levels of flows <br />to appraise gains and losses by reaches of the river. . To <br />facilitate ~uch :runs, permission of the Rio Grande Co~act <br />COIlJlllission will be sought to make controlled releases at <br />appropriate times from El Vado and Abiquiu :Reservoirs, <br /> <br />,,' raisal of' Channel Losses and Depletions - Rio Grande above <br />Otowi.. Aerial photographiC coverage is to be oMa ned for all <br />tributary irrigation units and any adjacent areas and river <br />channels which might be influenced by present or project 1rri-' <br />gation.A land culture study will. be made which in turn will <br /> <br />12 <br />