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<br />Sonora Hesu \I'ells (160.000 AFfvr) <br /> <br />~ <br />-', <br />",' In accordance ld th advice from Co=issioner Herrera <br />(November 14, 1972), Mexico plans to extract 200 million cubic <br />meters per year (162,000 AF/yr) from 67 l~ells constructed on <br />Sonora Hesa, innediately south of the international boundary <br />in early 1973. The initial pumping began in late December 1972. <br />In a ne.ispaper article (February 4, 1973), it was reported that <br />64 wells have b~en constructed and more than 50 percent are <br />complete and totally equipped; the others lack only small de- <br />'tails to be operational. The location of Sonora Hesa well <br />field is sholm on Figure B-l. <br /> <br />" <br /> <br />The singular quantitative effect of this pumping regimen <br />after 5, la, and 50 years is sho.m in Table 1. The computed <br />change of water levels after 10 years of pumping is shmm on <br />.. <br /> <br />Figure B-3. <br /> <br />,'A recapitulation of the effects at the end of SO, years <br />.- <br />follows. <br /> <br />a) Reduction and recharge from Colorado River would be <br />11,800 AF/yr (SO-year average); <br /> <br />b) DepIction of surface drainage flows at S.L.B. would be <br />22,800 AF/yr (50-year average); <br /> <br />c) Depletion of groundliater storage in United States <br />would be 1,470,000 AF at the end of 50 years; <br /> <br />d) Depletion of groundwater storage in Hexico would be <br />11,38'1,000 AF at the end of 50 years; <br /> <br />e) The elwnge in the rate of ground.wter flO1i across the <br />Arizona-Sonora boundary to Mexico at thc end of 50 ycars _ <br />'iould bc an increase of 52,1100 AF/yr and thc total floH <br />across this boundary 'iould be about 97,000 AF/yr. <br />