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原文传递 Drought Triggers Missouri River Conservation Measures

题名：	Drought Triggers Missouri River Conservation Measures
正文语种：	eng
摘要：	The ongoing drought in the Upper Midwest has triggered water conserva-tion measures, the Corps of Engineers' Missouri River Water management team announced July 8. Very dry conditions re-sulted in reduced flows for the second half of the navigation flow support sea-son, based on the July 1 Missouri River Mainstem Reservoir System storage, in accordance with guidelines outlined in the Master Manual.Very dry conditions continue to affect the upper Missouri River basin above Sioux City, Iowa—despite recent heavy rainfall in the lower basin—resulting in June runoff in the upper basin only 52 percent of average.The updated 2021 upper basin run-off forecast is 15.6 million acre-feet (maf.), about 60 percent of average. If realized, this runoff amount would be the 10th driest year in the upper ba-sin since 1898. System storage on July 1 was 55.2 maf., 0.9 maf. below the base of the Annual Flood Control and Multi- ple Use Zone. System storage is expect-ed to decline further into the Carryover Multiple Use Zone during the remain-der of 2021."We reduced the service level to support navigation by 1,500 cubic feet per second (cfs.) from the full-service level," said John Remus, chief of the Corps of Engineers' Missouri River Basin Water Management Division."This intermediate service level will be maintained through the end of the nav-igation flow support season, which will end on December 1 at the mouth of the Missouri. The intermediate service level is a necessary water conservation measure to ensure that authorized pur- poses will be served in the short and long term," Remus said.
出版年：	2021
期刊名称：	The Waterways Jouranl
卷：	135
期：	15