福建围填海演变对海岸侵蚀脆弱性影响研究OA

In order to better explore the relationship between reclamation and coastal erosion,this study used remote sensing imagery from 2009 to 2024 to interpret changes in the coastline and coastal reclamation.The evolution characteristics of reclamation in Fujian were analyzed,and the Reclamation Industrial Pressure Index(RIPI)and the Coastal Erosion Vulnerability Index(CEVI)based on the TOPSIS model were constructed.The two indices were uniformly weighted using the entropy weight method,and the impact mechanism of reclamation evolution on coastal erosion vulnerability was revealed through correlation analysis and spatial centroid migration model.The results show that:(1)Fujian's reclamation exhibited a phased characteristic of"high-level fluctuation followed by low-level stability"in terms of net change area.After the implementation of the policy in 2018,the intensity of reclamation development significantly decreased,and the development mode shifted from incremental expansion toward stock optimization.(2)Coastal erosion vulnerability decreased overall and exhibited a lagged response to regulatory policies,with a spatial pattern of"high in the south and low in the north."(3)RIPI and CEVI showed a significant positive correlation,and the correlation remained robust even after removing the indicator of reclamation from CEVI.This indicates that reclamation industrial pressure is an important anthropogenic factor driving changes in coastal erosion vulnerability.Further analysis indicated that the spatial pattern of coastal erosion vulnerability resulted from the combined effects of natural factors and human activities.