Yakima Basin Water Supply Forecast Released
Media Contact: John Redding , 208-738-5212
Kate Puckett , 509-575-5848 Ext. 205
For Release: April 06, 2005
The Bureau of Reclamation has just released the April 2004 forecast for irrigation water supply, according to Kate Puckett, Yakima Project river operations supervisor. The forecast is based on flow data, current snowpack and this year's precipitation data, Puckett said.
The April 2004 forecast indicates a full water supply for senior water right users and an 85 percent supply for junior water right users. "March brought us little rain or snow and we've had relatively warm weather - that certainly degraded our water forecast for the season," Puckett said. The tight water supply will result in low carryover at the end of the 2004 season. Current system storage is 54 percent of capacity and 82 percent of average.
Specific water delivery levels will not be determined until later in the year. In all conditions listed below, senior water rights holders would receive their full water supply. Estimated water supplies for junior (proratable) users, given a range of future precipitation, are as follows:
With 50 % normal subsequent conditions
75 % supply for junior users
With 80 % normal subsequent conditions
85 % supply for junior users
With 120% normal subsequent conditions
100% supply for junior users
Irrigation districts and water users are urged to apply their own judgement in deciding which level of supply may be realized. Water demands requiring storage releases, even prior to storage control, may be charged to the users' total entitlement. The water supply can be improved through prudent use of water.
The Bureau of Reclamation will announce the adopted rationing level when it is actually implemented. Irrigation districts and water users are urged to apply their own judgment in deciding which level of supply may be realized. Water demands requiring storage releases, even prior to storage control, may be charged to the users' total entitlement. The water supply can be improved through prudent use of water.
Future precipitation is only one factor affecting the water supply. The weather conditions that determine the timing of the run-off and demand for water are critical in determining whether the reservoirs fill, the amount of water available for irrigation, and possible rationing levels. If warm, dry weather prompts an early run-off, the situation could worsen.
Reservoir storage on March 1
Percent of Capacity
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