Study on Land Use Change and Land Ecological Security in Zhoushan Archipelago

Abstract

The purpose of the manuscript is to evaluate the land use change and land ecological security of Zhoushan Archipelago from 1995 to 2017, and to predict the land ecological security status from 2021 to 2025 to guide the intensive and ecological use of island land. Obtain the utilization status of 6 land-use types in Zhoushan Archipelago in 1995, 2000, 2005, 2010, 2015 and 2017 by using 12-view Landsat satellite remote sensing image data, the DPSIR-EES model was used to establish index system, the weight of each index was determined by entropy method, the multi-factor comprehensive weighting method was used to calculate ecological security index. The results showed that: the area of construction land in Zhoushan Archipelago continued to increase from 1995 to 2017, mainly through the occupation of grassland/cultivated land. Grassland/ cultivated land area decreased by 22.54%, and tidal flat area decreased by 62.66%. The land ecological security index in Zhoushan Archipelago showed an increasing trend, the security level raised from unsafe level to general security level. Conclusions are that land ecological security of Zhoushan Archipelago was generally good during study period, it is necessary to deal with the relationship between island land use and ecological environment protection in the future, and realize the symbiotic linkage between island economic and social development.