Study on Characteristics of Coastal Evolution Based on Remote Sensing Geomorphic Feature Line — A Case Study of Central Jiangsu Province, China

2018 International Conference on Civil and Hydraulic Engineering

土木建筑工程;水利工程

Fei, Ii^1 ; Anning, Suo^1 ; Chao, Zhou^1 ; Shiyong, Wen^1 ; Pengfei, Zhao^1

National Marine Environmental Monitoring Centre, Marine Resources and Environment Monitoring Centre, Dalian

116023, China^1

关键词: Coastal evolution;    Human activities;    Jiangsu province;    Protection and utilizations;    Red-crowned cranes;    Remote sensing technology;    Spatial resources;    Temporal and spatial evolutions;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/189/5/052026/pdf
DOI  :  10.1088/1755-1315/189/5/052026

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

Coastal evolution is of great significance for the protection and utilization of coastal spatial resources. Taking the coast of central Jiangsu Province as the research area, three typical coastal geomorphic lines such as seawall, vegetation line and low tide waterside line were extracted with remote sensing technology, and their temporal and spatial evolution characteristics were analyzed. The results show that due to the influence of human activities, the coast of central Jiangsu is markedly propelled to the sea. In two periods, the total newly added reclamation could reach 888.7km2, and the seawall line is averagely propelled 8079.4m to the sea. The differences in spatial distribution are significant, and the high-value area can reach 14000.0m, distributed in the bank between the Doulonggang estuary and the Chuandonggang estuary. The low-value area is only 2000m, distributed in the Red-crowned Crane Nature Reserve. The estuary is relatively low due to the external migration of the tidal gate in the early stage. The vegetation line is averagely propelled 4433.9m to the sea, and the differences in spatial distribution are relatively small, showing the high value in the center and a gradual decrease of north and south sides. The overall shape of the waterside waterline is stable, showing a backward trend of the shore; the low tide waterline is large. The retreat of low tide waterside waterline and the propel of seawall line to the sea has dramatically increased the shrinkage of the intertidal tidal flat. From 1973 to 2017, the intertidal tidal flat area decreased by 1056.7 km2.