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<br />. <br /> <br />the north and east, Crooked Arroyo on the south and fa1'lll lands on the west. <br />(see. Plate I). <br />No water level data are available in the vicinity of this area. and there <br />is no significant concentration of irrigation p.mlping nearby. The area is <br />several feet lower than the adjoining fa1'lll land, Crooked Arroyo runs through <br />the area canying irrigation returns most of the time and occasional stonn <br />waters, Irrigation excess from the fields to the west appears to be dis- <br />charged into this area most of the time in the irrigation season. A marshy <br />area exists along the west side of Area C. <br />Because of the above described conditions, it was concluded that the <br />water level is probably at the zero to 5 foot range. <br /> <br />Summary of Results <br /> <br />Using the foregoing data and observations and the water loss rates SUIII- <br />marized in Table 3, net water losses for the three areas are given in Table 5. <br />The average estimated savings are 2.4 acre feet per acre of cleared <br />phreatophytes after the expected loss per acre fran the cleared areas are sub- . <br />tracted from the estimated total water loss fran each of the phreatophyte <br />covered areas, <br />This estimate of salvage is similar to results of two research studies <br />carried on by the U. S. Geological Survey in Arizona (Table 6). The first <br />study listed was along the Gila River west of Safford (14). The results <br />showed an estimated savings of 2.5 acre feet per acre, As the water table <br />was mostly six feet or more below th!' surface, no vegetation had retuPJled <br />to reduce this savings at the time of the report. The elevation of this area <br />is about 3,000 feet and in the desert zone; thus, greater water losses would <br />be expected than for the studies at higher altitudes. <br />The second study area was in Cottonwood Wash southeast of Kingman (12) <br />at about 4,000 foot elevation, Clearing the cottonwoods fran a gauged reach <br />of the stream saved an average of L 7 acre feet per acre for the two years <br />studied. The amount of salvage decreased during the second year because of <br />. . <br />the return of woody shrubs along the stream. <br /> <br />Effects of Groundwater Pumping On River Supply <br /> <br />Studies have been made in the Arkansas River Basin by the State of Colo- <br />radQ and the U,S, Geological Survey to determine the. effects of p.mlping on <br />the' River supply. The Arkansas Basin from Pueblo to the Colorado-Kansas <br /> <br />-11- <br />