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<br />Summary of 'Vater Resources in Mexico
<br />
<br />.
<br />
<br />140,000
<br />
<br />U.S. Deliveries at Southern International Boundary (SIB)
<br />{1990.2001j
<br />
<br />120,000
<br />
<br />
<br />
<br />
<br />.242WellF'eld
<br />o easl Ma'" Canal WW
<br />. West Ma," Canal WW
<br />_0 Yuma ~a"!...D'a,n
<br />
<br />100,000
<br />
<br />
<br />
<br />
<br />
<br />
<br />..
<br />~
<br />.
<br />u 60,000
<br />"
<br />~
<br />.
<br />.
<br />..
<br />C
<br />~
<br />~
<br />
<br /> '(umaMa," enlMal" WHtMaln U.5.2"2 U,S.Oellvery
<br /> '(ur O'aln CanalWW CanalWW Wellllllld alSIS
<br />60.000 "'" 91700 '.00<> .". 308" 132,662
<br />"" .6200 ''''' 7,240 31,176 133<136
<br /> "" 9'100 4,710 6,UO 22.95A 125,208
<br /> "" 93100 8.160 5.730 6.-4/!9 113,H9
<br />40,000 '''' 92,600 1.490 5,390 19,242 124,122
<br />"" 90.700 ,."" 5,920 12,UI 116,457
<br /> '''' 96.300 7TTO "00 ''''' 115,999
<br /> "'" ""00 "00 "'" ." 112,"09
<br /> '''' 1()4.4oo 6,510 "'" 5.135 122735
<br />20.000 "'" '''300 "'" 8,150 3."" 126810
<br /> """ 111200 "'" 6,910 4247 129,637
<br /> """ 103,900 3,180 '.3&> '''' 117.320
<br />0
<br />"'" "'" "'" "'" "". "" '''' "m ,,.,, ,,.,, ,00<> ",,,
<br /> Year
<br />
<br />Groundwater Production
<br />. Groundwater is produced from 489 federally owned and operated wclls and 236 privately
<br />owned wells (725 total)
<br />
<br />. Groundwater is used to augment surface water supplies delivered at the NIB, SIB, and
<br />Limitrophe Division
<br />
<br />. Sources of groundwater recharge to the Colorado River aquifer include underllow frol11 the
<br />U.S. across the limitrophc and sm, seepage from the AAC, and recharge resulting from the
<br />application of water for irrigation in Mexicali and San Luis Valleys (e.g. seepage from
<br />unlined canals, ditches, and drains; over-application of water on irrigated lands)
<br />
<br />. The Rio Colorado Irrigation District has up to 727,000 acre feet of groundwater available
<br />during nonnal years when Mexico is delivered 1,500,000 acre-feet
<br />
<br />. Private well owners extract an unspecified amount of groundwater, but irrigate
<br />approximately 60,000 acres
<br />
<br />. Estimates of groundwater production vary from 500,000 to 1.000,000 acre-feet pcr year. The
<br />magnitude of groundwater production appears to be related to the magnitude of Colorado
<br />River water delivered at the international boundary (i.e. high flow years cquates to less
<br />groundwater production)
<br />
<br />SNW ^ Resources 4/24/02
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