CONTINUOUS CHANGE DETECTION OF URBAN LAKES IN WUHAN,CHINA USING MULTI-TEMPORAL REMOTE SENSING IMAGES
Urban lakes are important natural,scenic and pattern attractions of the city,and they are potential development resources as well.However,lots of urban lakes in China have been shrunk significantly or disappeared due to rapid urbanization.In this study,four Landsat images were used to perform a case study for lake change detection in downtown Wuhan,China,which were acquired on 1991,2002,2011 and 2017,respectively.Modified NDWI(MNDWI)was adopted to extract water bodies of urban areas from all these images,and OTSU was used to optimize the threshold selection.Furthermore,the variation of lake shrinkage was analysed in detail according to SVM classification and post-classification comparison,and the coverage of urban lakes in central area of Wuhan has decreased by 47.37 km2 between 1991 and 2017.The experimental results revealed that there were significant changes in the surface area of urban lakes over the 27 years,and it also indicated that rapid urbanization has a strong impact on the losses of urban water resources.
Change Detection Urban Lakes Multi-temporal Remote Sensing Images Modified NDWI Wuhan City
Wenyuan Zhang Xiaohan Kong Guoxin Tan Songyin Zheng
National Research Center of Cultural Industries,Central China Normal University,Luoyu Road,Wuhan,China
国际会议
北京
英文
2315-2320
2018-05-07（万方平台首次上网日期，不代表论文的发表时间）