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原文传递 Drought Persists In Upper Missouri River Basin

题名：	Drought Persists In Upper Missouri River Basin
正文语种：	eng
摘要：	Drought conditions continue to affect the upper Missouri River basin above Sioux City, Iowa, according to the latest report by the Missouri River Water Management Division of the Northwest Engineer Division. July runoff in the upper basin was only 34 percent of average. July runoff above Fort Peck Dam was the lowest in 123 years of record-keeping. Gavins Point Dam releases will be set to provide flow support at an intermediate service level, 1,500 cubic feet per second (cfs.) less than full service flow support at all four target locations (Sioux City, Omaha, Nebraska City, and Kansas City). Flow support volumes for the second half of the navigation season, as well as the navigation season length, are based on July 1 system storage. The flow support season length will be a full eight-month season, ending December 1 at the mouth of the Missouri River. The updated 2021 upper basin runoff forecast is 14.6 million acre-feet (maf.), or 57 percent of average. If realized, this runoff amount would be the 10th driest year in the upper basin since 1898. System storage on August 1 was 53.9 maf., 2.2 maf. below the base of the Annual Flood Control and Multiple Use Zone. System storage is expected to decline further into the Carryover Multiple Use Zone during the remainder of 2021.
出版年：	2021
期刊名称：	The Waterways Jouranl
卷：	135
期：	19