Fusing geophysical and remotely sensed data for observing overwash occurrence, frequency, and impact
The Water Institute of the Gulf, U.S. Army Corps of Engineers
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Abstract
Overwash is an important process that enables a barrier island to migrate landward to adapt to rising sea levels but can also impact vegetated areas and create coastal hazards for populated barrier islands. Our overall objectives were to hindcast overwash events from September 2008 to November 2009 and assess whether overwash impacts could be detected using moderate-resolution imagery (30 m). Estimates of wave and still water levels can be benchmarked against morphological characteristics from elevation datasets to predict overwash events. These observations can be combined with optical remote sensing data used to monitor for changes in vegetation greenness over time to evaluate potential impacts from overwash. This study highlighted how physical-based overwash data can be paired with observations of greenness. The results from our study highlighted that a discernable drop in greenness can be detected for major hurricanes, such as Hurricane Gustav in 2008, with a weaker signal observed for smaller magnitude events in 2009 like Hurricane Ida. Tracking overwash impacts to vegetation can be helpful for observing impacts to vegetation associated with restoration efforts and advancing our understanding of general overwash impacts and recovery.
Suggested Citation
Enwright, N., Dalyander, P., Jenkins, R.L., Godsey, E.S., and Stelly, S.J., 2023, Fusing geophysical and remotely sensed data for observing overwash occurrence, frequency, and impact, in The proceedings of the coastal sediments 2023, p. 2206-2219, https://doi.org/10.1142/9789811275135_0203.
| Publication type | Conference Paper |
|---|---|
| Publication Subtype | Conference Paper |
| Title | Fusing geophysical and remotely sensed data for observing overwash occurrence, frequency, and impact |
| DOI | 10.1142/9789811275135_0203 |
| Publication Date | March 23, 2023 |
| Year Published | 2023 |
| Language | English |
| Publisher | World Scientific |
| Contributing office(s) | St. Petersburg Coastal and Marine Science Center, Wetland and Aquatic Research Center |
| Description | 14 p.; Data Release |
| Larger Work Type | Book |
| Larger Work Subtype | Conference publication |
| Larger Work Title | The proceedings of the coastal sediments 2023 |
| First page | 2206 |
| Last page | 2219 |