I realize that saltwater intrusion isn't good for a fresh water marsh. These aren't fresh water marshes, they are brackish, and after Rita, with the weirs not able to hold back the salt water. Fishing and shrimpimg was some of the best we had in decades. So yes there is a give and take with the the system with water changing back and forth. So on productivity, flow back and forth seem to be good for fish/shrimp/crabs etc. Bad for duck hunters.....
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