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re: What's to keep USACE from adjusting flow at ORCS to push the salt wedge downriver?
Posted on 9/26/23 at 4:41 pm to biglego
Posted on 9/26/23 at 4:41 pm to biglego
Low Water Records
(1) 2.89 ft on 11/14/1895
(2) 3.24 ft on 11/12/1894
(3) 3.49 ft on 12/15/1872
(4) 3.84 ft on 11/03/1897
(5) 3.95 ft on 11/25/1887
Historic Crests
(1) 63.39 ft on 05/18/2011
(2) 61.94 ft on 03/19/2019
(3) 61.61 ft on 03/24/1997
(4) 61.42 ft on 04/16/2020
(5) 61.22 ft on 03/19/2018
This was slightly up river from St. Francisville. I'm sure the saltwater intrusion was not a big deal between the Civil War and WWI. On this same gauge its fixing to be at 13' for reference.
(1) 2.89 ft on 11/14/1895
(2) 3.24 ft on 11/12/1894
(3) 3.49 ft on 12/15/1872
(4) 3.84 ft on 11/03/1897
(5) 3.95 ft on 11/25/1887
Historic Crests
(1) 63.39 ft on 05/18/2011
(2) 61.94 ft on 03/19/2019
(3) 61.61 ft on 03/24/1997
(4) 61.42 ft on 04/16/2020
(5) 61.22 ft on 03/19/2018
This was slightly up river from St. Francisville. I'm sure the saltwater intrusion was not a big deal between the Civil War and WWI. On this same gauge its fixing to be at 13' for reference.
This post was edited on 9/26/23 at 4:42 pm
1
Posted on 9/26/23 at 7:23 pm to tigerbait703
It wasn’t as big a deal back then because the river was not as deep. In the early part of the 20th century it was decided that the river be dug deeper to allow for bigger ships to go through the river.
Salt water is heavier than fresh water so it flows up river on the bottom. Since the bottom is lower, it allows the saltwater to creep up more.
Also the same amount of water flowing down the river in those years with a shallow bottom versus now with a deeper bottom had more force to keep the saltwater at bay in the gulf.
Salt water is heavier than fresh water so it flows up river on the bottom. Since the bottom is lower, it allows the saltwater to creep up more.
Also the same amount of water flowing down the river in those years with a shallow bottom versus now with a deeper bottom had more force to keep the saltwater at bay in the gulf.
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