Shoreline change at Padre Island National Seashore, Texas: 2017–2019 data summary
Bracewell J. 2019. Shoreline change at Padre Island National Seashore, Texas: 2017–2019 data summary. Natural Resource Data Series. NPS/GULN/NRDS—2019/1238. National Park Service. Fort Collins, Colorado
In May and June 2017 and April 2019 the Gulf Coast Network collected shoreline data at Padre Island National Seashore as a part of the NPS Vital Signs Monitoring Program. Monitoring was conducted following methods detailed in Monitoring shoreline position at Gulf Coast Network parks: Protocol implementation plan (PIP; Bracewell 2017). Shoreline change was calculated using the Digital Shoreline Analysis System developed by USGS (Theiler et al. 2008). Key findings from this effort are as follows: Shoreline position was recorded for the entire Gulf-side shore, a 105 kilometer (65.2 mile [mi]) extent. Overall, 94.5% of transects exhibited landward retreat and only 5.5% of transects were static or advanced seaward. The mean shoreline change rate change from 2017 to 2019 was -3.68 meters per year (-12.07 feet [ft] per year) with a standard deviation of 2.3 meters (7.5 ft). The shoreline change rate ranged from -12.11 meters per year to +4.83 meters per year (-39.73 ft/yr to +15.84 ft/yr). This project is in the early phases of implementation and will benefit from future surveys to better understand the influence of slight changes in survey timing and other environmental variations.
- Type
- Published Report
- Authors
- Bracewell, Jeff
- Date of Issue
- 2019-10
- Publisher
- National Park Service
- Units
- GULN , NRSS , PAIS