环杭州湾土地利用变化与生态脆弱性评价

Land Use Change and Ecological Vulnerability Evaluation Around Hangzhou Bay

本文基于RS和GIS技术,研究了环杭州湾地区2005-2015年的土地利用变化状况,利用空间主成分分析对生态脆弱性进行定量评价,并探讨了土地利用变化与生态脆弱性之间的联系。得出结论,(1)2005-2015年,环杭州湾耕地面积减少1756.59 km^(2),建设用地面积增加2169.94 km^(2);(2)2005-2015年,环杭州湾生态脆弱性综合指数从2.67到2.43再到2.61,呈现出先降后升的趋势。各市生态脆弱性综合指数大小排序:上海>嘉兴>宁波>湖州>绍兴>杭州>舟山;(3)各土地利用类型的生态脆弱性综合指数大小排序:建设用地>未利用地>水域>草地>耕地>林地。

Based on RS and GIS technology,this paper studied the land use change status around Hangzhou Bay area from 2005 to 2015,used Spatial Principal Component Analysis(SPCA)method to make quantitative evaluation of ecological vulnerability,and discussed the relationship between land use change and ecological vulnerability.Conclusions,(1)from 2005 to 2015,the area of cultivated land around Hangzhou Bay decreased by 1756.59 km^(2),while the area of construction land increased by 2169.94 km^(2);(2)from 2005 to 2015,the Ecological Vulnerability Synthetic Index(EVSI)around Hangzhou Bay went from 2.67 to 2.43 and then to 2.61,showing a trend of decline first and then rise.The order of EVSI in different cities was:Shanghai>Jiaxing>Ningbo>Huzhou>Shaoxing>Hangzhou>Zhoushan;(3)The order of EVSI of various land use types was:construction land>waste land>water area>grassland>cultivated land>forest land.