Comprehensive Evaluation of Coastline Development and Utilization Intensity—A case study of Dafeng China

Abstract

The coastline plays an important role in the development and utilization of resources in the coastal waters and ecosystem protection. With the continued active development of coastal development and utilization activities, the development and protection of the coastline has become a major issue of the coastal zone. In order to scientifically and effectively assess the degree of coastline development and utilization, based on the characteristics of coastal wetland ecological stability, shoreline utilization disturbance characteristics and artificial dam dynamic change, a comprehensive evaluation model for coastline development and utilization intensity was established, and China Dafeng was taken as an example to conduct analytical evaluation. The results show that the total length of the Dafeng coastline is about 79.3km, and the coastal salt marsh vegetation and tidal flat landforms are widely distributed. The average depth of the coastal wetlands can reach 3.4km; the port, industry and other strong interference shores account for 16.2% of the total length of the shoreline. The moderately disturbed shores accounted for 61.8% of the total length of the shoreline, and the coastal natural attributes were better than the total length of the shoreline of 22.1%. Since 1973, the artificial levees of the Dafeng Coast continued to advance to the sea, with an average approach distance of 9.2km, which can up to 14.7 km; Dafeng coastline has significant spatial differences in development and utilization intensity. The lengths of the five types of high-strength, medium-high-strength, medium-strength, medium-low-intensity and low-intensity coastlines are 12.1km, 13.4km, 17.5km, and 21.6km, 14.7km, respectively. The high-strength and medium-high-strength development and utilization shore sections are mainly concentrated in the port shore and industrial shore sections centered on Dafeng port.