详情

原文传递 Corps Augments Underwater Sill To Slow Salt Water Intrusion

题名：	Corps Augments Underwater Sill To Slow Salt Water Intrusion
正文语种：	eng
作者：	FRANK MCCORMACK
摘要：	Salt water in the Mississippi River is continuing to move upstream, threatening the fresh water supply of communities along the last 100 miles of the river. Salt water is more dense than fresh water, and the riverbed of the Lower Mississippi River is below sea level, so when flows in the river are extremely low, salt water pushes upstream. It does so in the shape of a wedge, with the leading edge on the riverbed and sea-water rising toward the surface downstream. Historically, sea water reaches the surface of the river about 15 to 25 miles downstream of the toe. In the past week, the leading edge or toe of the salt water wedge moving up the Mississippi River from the Gulf of Mexico has traveled upriver about 3 miles, with the New Orleans Engineer District estimating it to be at about Mile 69.4 above Head of Passes (AHP) as of September 27. That's near the town of Jesuit Bend and about 5 miles upriver from a sill the Corps has built to slow the upward flow of salt water.
出版年：	2023
期刊名称：	The Waterways Jouranl
卷：	137
期：	27
页码：	5-5