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<br />n' <br /> <br />GROUNDWATER CO};DITIOl\'S IN EARLY 1970'S <br />IN THE UPPER COLORADO DELTA <br /> <br />Internal Sources of Water <br /> <br />The components given herein are to <br />only and the quantitative values have <br />nearest 10,000 acre-feet. The various <br />water (input) sources for early 1970's <br />hydrologic system are as follows: <br /> <br />provide a gross analysis <br />been rounded to the <br />components of internal <br />in the Colorado delta <br /> <br />Component <br /> <br />Acre-feet <br />Per Year <br /> <br />a) <br />b) <br />c) <br /> <br />Yuma Mesa, return irrigation 1mter <br /> <br />Yuma Valley, return irrigation 1~ater <br /> <br />Leakage from All-American Canal <br />(Pilot Knob to East Highland Canal) <br /> <br />200,000 <br /> <br />100,000 <br /> <br />100,000 <br /> <br />Total Internal Water Source (Input) <br /> <br />If 00,000 <br /> <br />Internal Abstraction or Output <br /> <br />Gomponen-t <br /> <br />a) }!exicali Valley <br />(Net abstraction equals ground",ater <br />pumped les~ return irrigation vater) <br /> <br />b) Yuma Valley Drainage Waters; Net <br />(Incl udes ",'aters from gravi ty drains, <br />drainage ,,'ells, and 1'Iaste 1WYS) <br /> <br />c) South Gila Valley <br /> <br />d) Pumping from Private Interests Yu[!!a Nesa <br />(Net Draft) <br /> <br />Acre-feet <br />P'er-Ye-a:l' <br /> <br />200,000 <br /> <br />150,000 <br /> <br />60,000 <br /> <br />30,000 <br /> <br />Total Abstraction or Draft <br /> <br />'1110,000 <br /> <br />e) Change in GroundHater Storage; <br />data illCli eatc there is dcerease by <br />Mexieali Valley pUUlpage <br /> <br />-110,000 <br /> <br />10 <br /> <br />, <br />, ! <br />