文献类型：期刊文献

英文题名：China's coastal-wetland change analysis based on high-resolution remote sensing

作者：Gao, Yin[1,2] Cui, Lijuan[1] Liu, Jianjun[2] Li, Wei[1] Lei, Yinru[1]

第一作者：Gao, Yin;高莹

通信作者：Cui, LJ[1]

机构：[1]Chinese Acad Forestry, Inst Wetland Res, Iangshan Rd,Dongxiaofu 1, Beijing 100091, Peoples R China;[2]Natl Geomat Ctr China, 28 Lianhuachi West Rd, Beijing 100830, Peoples R China

年份：2020

卷号：71

期号：9

起止页码：1161-1181

外文期刊名：MARINE AND FRESHWATER RESEARCH

收录：;Scopus(收录号：2-s2.0-85079195745);WOS:【SCI-EXPANDED(收录号:WOS:000562536400010)】；

基金：This study was funded by National Key R&D Program of China (2017YFC0506200).

语种：英文

外文关键词：change detection; human influence; national scale

摘要：Coastal wetlands not only have abundant biodiversity and high productivity, but they also play an irreplaceable and important role in regional ecosystems. Because of the complex structure and dynamic characteristics of coastal wetlands, it is difficult to observe the spatial changes of coastal wetlands on a large scale and improve data reliability. In this study, a spatially constrained manual-interpretation method based on nationwide high-resolution images in 2017 was adopted to extract China's coastal wetland distribution, and, then, the second national wetland-survey data from 2011 were used as a baseline for change analysis. The results showed that under the influence of natural conditions and human activities, China's coastal wetlands have decreased in distribution in the past 6 years. The situation of coastal wetland reclamation is critical, and the hotspot regions are mainly distributed in Bohai Bay, middle of Jiangsu province and Hangzhou Bay. Farming reclamation is another factor that occupies coastal wetlands in China, and main occupied wetlands are mudflats, shallow sea, tidal flats, intertidal salt marshes and estuarine waters. Tide is the main factor affecting extraction of wetlands, the spatially constrained method had a positive effect on wetland detection, and has potential to improve automatic algorithms of complex coastal wetlands.