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<br />,~- L-:-.~__ .c.:;-. _ ';.'-.' ;J, ,..:.,~:-",~,." _",;,-,,:;-;. -<-;;:S-~"-_~;:';:-;'if.:-3;;'~;;::;:'~. :::-I;''i!'/' ,"; ..:~'l:-r <br /> <br />6. Loss of ag~icultu~alp~oduction because of pOd~ d~ainage. <br /> <br />7. Lo'ss of w.ate~ from la~ge areas covered with phreatophytes; <br />also, reduction in channel and floodway capacity where <br />these growths are not controlled. <br /> <br />Problem Area 4; ASA1304. <br /> <br />Unless positive steps are taken to reduce salinity, siltation, <br />and phreatophytic growth along the mains tern of the Pecos River down- <br />stream from Santa Rosa, negative effects will continue in the form of: <br /> <br />1. Surface-wate~ supplies cannot be used for most municipal <br />and industrial purposes without expensive treatment. When <br />used for agricultural purposes, considerable water is required <br />to leachsal.ts below the root zone. In some areas, it is also <br />necessary to add sulphuric acid to the water and gypsum to the <br />soil to maintain a reasonable salt balance. <br /> <br />2. Surface-water quality exceeds the tolerance of some vegetable <br />and fruit crops. Failure to obtain satisfactory stands during <br />germination frequently reduces yields of semi tolerant crops <br />such as cotton and wheat. <br /> <br />3. Continued siltation of stream channels and reservoir areas. <br /> <br />4. Loss of water from large areas covered with phreatophytes; <br />also, reduction in channel and floodway capacity where these <br />growths are not controlled. <br /> <br />Problem Area 5, ASA's 1302 and 1304. <br /> <br />The problem of diminishing ground-water supplies resulting from <br />ground-water mining in irrigated areas will have these negative effects. <br /> <br />1. Loss in food and fiber production as the ground-water supplies <br />diminish. <br /> <br />2. <br /> <br />Social and economic impacts resulting from loss of income <br />which will occur as these lands change from irrigated to <br />dry cropland uses. <br /> <br />'\, .~ I r, ~ <br />\.J ., '-. .I. <br /> <br />J <br /> <br />TEXAS <br /> <br />The broad implication of not sol.ving severe water and related problems <br />is directl.y related to the need to pIan for the solution and prevention of <br />water probl.ems. In this regard, there are two compell.ing reasons for <br />devel.oping plans to solve water resource problems: (1) the quantity of <br />water necessary to meet Texas' large and growing need is not available <br />from ground-water aquifers and undeveloped flowing streams; and (2) the <br />time required to find, develop, and deliver additional quantities of suitable <br />quality water exceeds the length of time that the people and the economy of <br />Texas can survive a water supply interrupting drought. <br /> <br />76 <br />