Variations in hurricane storm surge sedimentation along four transects on the southeast Texas Gulf Coast

Authors: Joshua Hodge*, Texas State University - San Marcos
Topics: Coastal and Marine, Geomorphology, Climatology and Meteorology
Keywords: Hurricane Ike, McFaddin National Wildlife Refuge, storm surge sedimentation, sea-level rise, coastal marshes
Session Type: Poster
Day: 4/4/2019
Start / End Time: 8:00 AM / 9:40 AM
Room: Lincoln 2, Marriott, Exhibition Level
Presentation File: Download

This study investigates the spatial extent of the Hurricane Ike sediment deposit on coastal marshes at McFaddin National Wildlife Refuge in southeast Texas. Fieldwork conducted in summer 2017 and summer 2018 involved digging shallow pits on four transects between Sabine Pass and High Island, Texas. Eight pit sites were established on the easternmost transect, and six pit sites each were established on the three westernmost transects. Preliminary results indicate that the Hurricane Ike sediment deposit has been found on all four transects, and that the deposits decrease in thickness at the pit sites located further landward along each transect. Additionally, there is evidence that sedimentation has been impacted by the presence of man-made levees on some of the transects. The goal of this study is to discover spatial variations of the Hurricane Ike storm surge sediment deposit in relation to the landfall location of Hurricane Ike. The findings of this study should provide improved understanding of the spatial relationship between storm surge sedimentation and storm surge heights, valuable knowledge about the sedimentary response of coastal marshes subject to storm surge deposition, a greater understanding of anthropogenic impacts on sedimentation, and useful guidance to public policy aimed at combating the effects of sea level rise on coastal marshes along the northern Gulf of Mexico coastline.

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