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re: Mississippi River diverging: When do we finally let it go down the Atchafalaya?
Posted on 3/7/15 at 1:50 pm to jimbeam
Posted on 3/7/15 at 1:50 pm to jimbeam
A couple things I don't understand. If the river would naturally replace the sediment if it followed the course that the river wants to take, shouldn't it be creating new wetlands elsewhere? That silt has to go somewhere.
Someone said if the current course had 30% of the flow, salt water would contaminate the local drinking supply (as if that nasty water is actually clean right now. I've inspected way too much of the infrastructure in Nola to pretend it's drinkable). So what percentage of average flow would be maintained to keep the salt water from intruding? Is there a way to do both, but just at lower levels, or would that just be a bandaid on the problem?
Someone said if the current course had 30% of the flow, salt water would contaminate the local drinking supply (as if that nasty water is actually clean right now. I've inspected way too much of the infrastructure in Nola to pretend it's drinkable). So what percentage of average flow would be maintained to keep the salt water from intruding? Is there a way to do both, but just at lower levels, or would that just be a bandaid on the problem?
Posted on 3/7/15 at 1:52 pm to CCTider
quote:
shouldn't it be creating new wetlands elsewhere?
it's been building in Wax Lake.
Problem is the silt flow is far to low because of damming and diversions in the upper river.
Posted on 3/7/15 at 1:55 pm to CCTider
The amount of silt in the river now is 1/2 of what is was 100 years ago because of dams. But yes, if they blew the control structures, the MS would silt up and shallow because of low flow rate, wax lake would build substantially
Posted on 3/7/15 at 1:56 pm to CCTider
The silt deposits on the seabed at the mouth of the (current) Mississippi, which is essentially a cliff into the abyss. It builds up underwater at the edge, and eventually collapses over the cliff in a huge underwater mudslide.
That area of the gulf is a mudslide zone to the O&G industry.
That area of the gulf is a mudslide zone to the O&G industry.
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