Remote sensing study of wetlands in the Pearl River Delta during 1995-2015 with the support vector machine method

作     者：Xiaosong HAN Jiayi PAN Adam T. DEVLIN 

作者机构：Institute of Space and Earth Information Science The Chinese University of Hong Kong Hong Kong China 

出 版 物：《Frontiers of Earth Science》 (地球科学前沿（英文版）)

年 卷 期：2018年第12卷第3期

页      面：521-531页

核心收录：

学科分类：08[工学] 09[农学] 083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081203[工学-计算机应用技术] 0804[工学-仪器科学与技术] 0903[农学-农业资源与环境] 0816[工学-测绘科学与技术] 081602[工学-摄影测量与遥感] 0835[工学-软件工程] 081102[工学-检测技术与自动化装置] 0811[工学-控制科学与工程] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：This work is supported by the General Research Fund of Hong Kong Research Grants Council (RGC) under Grants CUHK 402912 and 403113  the Hong Kong Innovation and Technology Fund under Grant ITS/321/13  the direct grants of the Chinese University of Hong Kong  and the National Natural Science Foundation of China (Grant Nos. 41376035  41376125  and 41006070) 

主　　题：wetland Pearl River Delta support vector machine method Landsat images 

摘      要：In recent years, experienced rapid economic the Pearl River Delta has growth which may create a substantial burden to its ecology. In this study, the wetlands of the Pearl River Delta are investigated. Through the use of remote sensing methods, we analyze spatial and temporal variations of wetlands in this area over the past twenty years. The support vector machine （SVM） method is proven to be an effective approach for classifying the wetlands of the Pearl River Delta, and the total classifica- tion resolution reaches 94.94% with a Kappa coefficient exceeding 0.94, higher than other comparable analysis methods. Our results show that wetland areas were reduced by 36.9% during the past twenty years. The change detection analysis method shows that there was a 95.58% intertidal zone change to other land-use types, most of which （57.12%） was converted to construction land. In addition, farmland was reduced by 54.89% during the past twenty years, 47.19% of which was changed to construction land use. The inland water area increased 19.02%, but most of this growth （18.77%） was converted from the intertidal zone.