R. Eugene Turner has built a nearly 50-year career in Louisiana studying the effects of river diversions and other engineered solutions to the state’s disappearing coastal wetlands. Experts say the project, currently under federal environmental review, is the most consequential piece of Louisiana’s 50-year, $50 billion coastal restoration effort. Sponsors and advocates of the Barataria Bay project say that’s exactly why landscape-scale river diversions are necessary. Gary Brown, a technical reviewer with the Army Corps’ Engineer Research and Development Center in Vicksburg, Miss., said he is aware of the scientific disagreement over the Barataria Bay project. He said he believes the “effort and rigorousness” behind the Coastal Protection and Restoration Authority’s Barataria Bay models are high.