Guandong Li¹, Kehui Xu^1,2, Samuel J Bentley^2,3, Yanxia Ma⁴, Z. George Xue¹ and Robert Bales¹, (1)Louisiana State University, Oceanography and Coastal Sciences, Baton Rouge, LA, United States, (2)Coastal Studies Institute, Baton Rouge, LA, United States, (3)Louisiana State University, Geology and Geophysics, Baton Rouge, LA, United States, (4)Louisiana State University, Baton Rouge, LA, United States