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<br />COLORADO
<br />WATER SUPPLY CONDITIONS UPDATE
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<br />ROOM 818, 1313 SHERMAN ST., DENVER. CO 80203
<br />303-866-3581: 'Mvw.water.state.co.u~
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<br />SEPTE!v!BER 2003
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<br />No major changes in conditions have occurred over the past months, with the entire state remaining in a below
<br />normal water supply situation, The SWSI values show the South Platte basin perhaps a bit better off than the other
<br />basins, although both stream flow and reservoir storage are below average in that basin, as they are in the rest of the
<br />stale, During August rains did benefit some of Ihe southern and western areas of the state, including the Rio Grande, San
<br />Juan/Dolores, Gunnison, and Colorado basins. The Arkansas, Soulh Platte, and YampalWhite basins were hot and dry,
<br />Reservoir levels dropped as stored water continued to be utilized across the state, helping those who had rights to that
<br />water,
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<br />The Surface Water Supply Index (SWSI) developed by this office and the U.S.D.A. Natural Resources
<br />Conservation Service is used as an indicator of mountain-based water supply conditions in the major river basins of the
<br />stale, It is based on stream flow, reservoir storage, and precipitation for the summer period (May through October),
<br />During the summer period, stream flow is the primary component in all basins except the South Platte basin where
<br />reservoir storage is given the most weight The following SWSI values were computed for each of the seven major basins
<br />for September 1, 2003, and reflect the conditions during the month of August.
<br />
<br /> Sept. 1,2003 Change From Change From
<br /> Basin SWSI Value Previous MQD.th Previous Year
<br /> South Platte 0.4 +0,7 +3,6
<br /> ArKansas -2.2 -0.4 -0,3
<br /> Rio Grande -3.2 +0,3 +0.4
<br /> Gunnison -3,1 -0.4 +0,7
<br /> Colorado -1.4 +0.8 +2.4
<br /> YampaiWhite -3,0 -1,0 +0,8
<br /> San Juan/Dolores -2.2 +1.4 +1,9
<br /> Scale
<br />-4 .3 -2 -1 0 2 3 4
<br />Severe Moderate Near Normal Above Normal Abundant
<br />Drought Drought Supply Supply Supply
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