Monday, February 4, 2019

Low snowpack and reservoirs point to continued drought


            “It doesn’t look good”
            That  would probably be the consensus of various stakeholders if asked to predict Central Oregon’s water situation for the coming Spring and Summer.
            True, the snowpack is generally better than the 2017-2018 winter. But that gradual improvement has a long way to go even if more snows and a cooler Spring are to add significantly to already record low reservoir levels which feed river flows.

            As of mid-January the US Drought Monitor map showed all but a thin northwest sliver of Deschutes County was in extreme drought, along with a large area of far eastern Oregon. Most of the rest of the state was in severe drought and only the far northeastern and a smlaller northwestern area had escaped a drought designation. And those were categorized as abnormally dry.
            A year ago in January, even after a low snowpack, there were no areas of the state classified as even abnorrmally dry or in a drought condition.
            Maybe the good news is that thus far no area of the state has been tagged as in “exceptional drought,” the most serious of the monitor as reported by the US Department of Agriculture in cooperation with other agencies.

            In the Upper Deschutes Basin at Wickiup Reservoir, the region’s largest, the level as of Feb 4 was a 53% of capacity, or about 106,000 acre feet of water. Last year at this time the reservoir held more than 176,000 acre feet. The average is approximately 165,000.
            Last year’s water level was due in large part to the benefits gained from the the previous 2016-2017 year’s extremely deep snowpack and ensuing runoff that kept reservoir levels higher as the following “water year” began in the fall of 2017.
            Comparing current snowpacks with previous years, the SNOTEL reporting station at Three Creeks Meadow south of Sisters reported a snow water equivalent of 8.6 inches in the accumulated snow, only 67% of the 12.8 inches median for the period 1981-2010.