Laserfiche WebLink
<br />COLORADO <br />WATER SUPPPL Y CONDITIONS UPDATE <br /> <br />FROM THE OFFICE OF THE STATE ENGINEER: COLORADO DIVISION OF WATER RESOURCES <br />ROOM 818,1313 SHERMAN ST., DENVER, CO, 80203 <br />303-866-3581; WWW.wATER.STATE.CO.US <br /> <br />July 1999 <br /> <br />Positive SWSI values in all basins reflect normal to above normal water supply conditions in all of the state's <br />major river drainages. The snowmelt runoff peaked in June, and while individual stream flows will vary in response to <br />precipitation events, the trend will be for continued reduction in all flows as the summer progresses. Both stream flows <br />and reservoir storage levels are currently above normal levels. Statewide reservoir storage at the end of June was <br />approximately 130% of average. <br /> <br />The Surface Water Supply Index (SWSI) developed by this office and the U.S.DA Natural Resources <br />Conservation Service is used as an indicator of mountain based water supply conditions in the major river basins of the <br />state. 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 July 1, 1999, and reflect the conditions during the month of June. <br /> <br /> July 1,1999 Change From Change From <br /> Basin SWSI Value Previous Month Previous Year <br /> South Platte 3.5 -0.2 +1.0 <br /> Arkansas 2.5 +1.8 +2.4 <br /> Rio Grande 1.9 +1.6 +2.9 <br /> Gunnison 1.6 +0.9 +2.6 <br /> Colorado 1.2 +1.8 +2.8 <br /> Yampa/White 0.8 +1.4 -0.2 <br /> San Juan/Dolores 1.5 +1.1 +2.2 <br /> Scale <br />-4 -3 -2 -1 0 1 2 3 4 <br />Severe Moderate Near Normal Above Normal Abundant <br />Drought Drought Supply Supply Supply <br /> <br />1 <br />