Flood risk at the coastal land margin is influenced by both hydrologic and tidal processes, especially in deltaic flood plains, which leads to the realization that there exist transitional zones of flood hazard and risk. This coastal flood plain phenomena will be better understood by delineating dominant contributors to flood hazard and risk as they move from surge-only (in the immediate coastal flood zone) to hydrologic and tidal (including both low impact, high frequency events such as winter storms and higher impact lower frequency events such as storm surge) to rainfall-induced-only further from the coast. The intent of the proposed efforts are to demonstrate that while this transitional flood risk zone retreats towards populated areas with coastal land loss, it can also be advanced away from urban centers with the aid of Louisiana Coastal Master Plan projects. To do so will directly address the Rationale from Topic 6: “The Coastal Master Plan recognizes the importance of both future climate change and episodic forcing, such as storms and droughts, in shaping the future of the coast and the success of protection and restoration projects.” The aim of the proposed research is to address these fundamental issues by defining regions where both rainfall runoff and storm surge (both winter and tropical storms) overlap through development of a coupled hydrologic and hydrodynamic model to enable more comprehensive enhanced flood risk assessments and more.
“Coupling Hydrologic, Tide and Surge Processes to Enhance Flood Risk Assessments for the Louisiana Coastal Master Plan.” The Water Institute of the Gulf, Restore Act Center of Excellence for Louisiana, 01/25/2017, $499,882 (PI: S.C. Hagen), Role: Co-PI