Analyses of shoreline movement to assess sediment stabilization from 2012-10-29 to 2017-09-08

Satellite imagery imported into ArcGIS software were used to delineate the shoreline (defined as the edge of vegetation) and calculate shoreline movement as a proxy for sediment stabilization. For at least 2 years prior to and for each sampling year of the study, the imagery for each of the plots was obtained with a minimum of 1 viable image per year for a total of 4 analyses over the project period. Changes in shoreline position were calculated using U.S. Geological Survey (USGS) Digital Shoreline Analysis System (DSAS) and used estimate erosion rates for each site.

本研究采用导入ArcGIS软件的卫星影像勾勒海岸线（定义为植被边界），并通过计算海岸线迁移量作为沉积物稳定状况的替代表征指标。在研究的每个采样年份以及研究开展前至少2年的时段内，为每个样地获取卫星影像，每年至少获取1幅可用影像，项目周期内总计开展4次分析。研究借助美国地质调查局（U.S. Geological Survey, USGS）数字海岸线分析系统（Digital Shoreline Analysis System, DSAS）计算海岸线位置变化，并以此估算各站点的侵蚀速率。