摘要: |
Very dry conditions in April resulted in much lower runoff in the upper Missouri River Basin and could lead to navigation restrictions in the second half of the year, the Corps of Engineers reported. The upper Basin runoff was 44 percent of average, which was the ninth driest April in 123 years of record. The updated 2021 upper basin runoff forecast is 17.8 million acre-feet (maf.), 69 percent of average, which, if realized, would rank as the 22nd lowest calendar year runoff volume. "The extremely dry April, current drought conditions and below-normal mountain snowpack has led our office to significantly lower the 2021 calendar year runoff forecast," said John Remus, chief of the U.S. Corps' Missouri River Basin Water Management Division. "Based on this forecast, the May reservoir monthly studies indicate reduced flow support for navigation during the second half of the navigation season and a 12,000 cfs. Gavins Point winter release rate," he said. "I urge all water users, particularly intake owners, to begin preparing for the possibility of lower river levels later this summer and during the fall and winter." |