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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />002233 <br /> <br />The alternative approach has been to conduct extensive field <br />surveys of selected areas under today's conditions of high depen- <br />dence upon an irrigation based agriculture as well as intensive <br />evaluations of the expectations of many knowledgeable persons in <br />these areas as to the kinds and rates of adjustments that will be <br />taken in light of the trend toward economic -- if not merely <br />physical -- depletion of the groundwater resourceo This report <br />documents the two field surveys and evaluations -- in a nine- <br />county Texas South Plains area reasonably representative of the <br />southern three States of Texas, New Mexico, and (to a lesser de- <br />gree) Oklahoma, and in a 14-county Southwest Kansas area reason- <br />ably representative of the northern States of the High Plains <br />study region, i.e., western Nebraska, western Kansas, and eastern <br />Coloradoo Together, these 23 case-study counties constitute about <br />12 percent of the entire Ogallala study area. While no case study <br />area could exactly represent the whole region, consistency in <br />agricultural developments within the northern and southern groups of <br />States makes for reasonably illustrative case study areas as s~lected, <br /> <br />1-5 <br /> <br />Arthur D lillle.lnc <br />