Hope this helps provide information, really only intend to provide some information from the perspective of being the one person that has side scanned the entire Galveston Bay Complex and what really happened out there under the water.
Floods ... Yes, that's going to help the oyster population tremendously. First of all, all that fresh water finally pushed out or killed the the high salinity predators that were decimating the reefs... But, temporarily it also killed a lot of Trinity bay and upper Galveston bay oyster due to staying fresh too long. All those oysters that were killed will be substrate for the 'spat' (oyster larvae) to land on right now. Right now we finally have the right conditions if it will just last like that for a couple of years.
Also, with regard to the Karankawa Indian comment.... no, they didn't need to turn their oyster beds... they didn't have the problem with sediment runoff that we have today. There were no agricultural crops, it was all grasslands that protected the soils. Today we primarily have unprotected soils in almost all rural areas for miles and miles and those unprotected soils are available to translocation from rain and erosion. Find a map of Mattagorda at the mouth of the Colorado from 100 years ago and there was no road to the beach... that road to the beach was built on sediment that formed from after the industrial / agricultural age. Over about 40 years that system changed dramatically. Im not saying we go back to that... because we can't. We have to look at how to maximize everything for all parties involved and it's not a one variable equation. Its multi variate with lots of problems to think thru. I'm not saying that harvest doesn't need to be managed either. But currently I can tell you that oyster boat activity on reefs that are harvested is helpful to sustaining a healthy fishery for us. If not, it would all be buried in sediment. Also, I think its only fair that everyone knows that it's not the oyster industry that has decimated our reefs, it was 8 years of draught and high salinity predators to oysters. I can tell you from personal observation that is what wiped it out. While it takes 3 years for an oyster to become big enough to harvest.. it only takes 3 months for new reef to form on hard substrate that was turned up... and trout and reds don't care what size oyster is on it... as long as it's live it's better fishing.
I also am not for or against the oyster industry.. I remember Saturday Night Live long ago when RosanaRosanaDanna said "eating raw oysters are like chewing on a flemball".. Classic. LOL