Remote Sensing Monitoring of Shenzhen Coastline Changes over the Past 40 Years

Since the reform and opening-up, the ecological environment of the coastline of Shenzhen has been under pressure from high-intensity human exploitation activities. Additionally, the structure, type, and length of the coastline has undergone significant changes. Studying the changes of the Shenzhen coastline over the past 40 years is helpful to reveal its spatial and temporal evolutionary processes and driving mechanisms to provide a reference for the protection and utilization of coastline resources. This study screened 16 scenes of the Shenzhen regional Landsat remote sensing images from 1979 to 2019, and performed a coastline extraction using Remote Sensing (RS) and Geographic Information System (GIS) methods to ensure alignment, accuracy, and extraction precision to meet the research requirements. Based on four coastline evaluation indexes (End Point Rates, Linear Regression Rates, Coastline-type Diversity Index, and Comprehensive Index of Coastline Utilization), the spatiotemporal characteristics of the c