北京师范大学学报（自然科学版）2019，Vol.55Issue(1)：83-100,18.DOI:10.16360/j.cnki.jbnuns.2019.01.010
基于Landsat数据的1975—2015年中国海岸线时空变化分析
Spatiotemporal changes of the Chinese coastlines:Landsat imagery from 1975 to 2015
摘要
Abstract
Coastlines have unique geographical,morphological,and dynamic characteristics describing the most important geographical elements of boundary between land and ocean.Coastal areas are the most active and concentrated places of human economic activities.Coastlines of China underwent tremendous changes under influences of economic development.In this study,we extracted instantaneous shoreline information using a modified normalized water index based on Landsat data from 1975 to 2015,and quantified dynamic changes in terms of length and area.It was found that over the past 40 years,the overall shoreline length had increased steadily,from 15 945.7 km in 1975,to 17 045.8 km in 1990,17 234.2 km in 2000,17 377.7 km in 2010 and to 17 364.9km in 2015.The shoreline area increment as compared with the last period data were 4 336.5,1 510.4,3 447.2,and 3 100.4 km2,respectively.The change intensity varied by provinces.In general,China's natural coastline had been gradually replaced by artificial coastlines that lead to an increase in land area and coastline length.This phenomenon was largely driven by social-economic activities and had negative impacts on environment and ecology.The present study can be a prototype in efficiently and effectively extracting shorelines.Derived mapping results are valuable to coastal environmental monitoring,urban and regional planning,and resource management.关键词
海岸线时空变化/陆地卫星(Landsat)/遥感Key words
spatiotemporal change of coastline/Landsat/remote sensing分类
海洋科学引用本文复制引用
王冰洁,梁璐,惠凤鸣,程晓,宫鹏,陈卓奇,黄华兵..基于Landsat数据的1975—2015年中国海岸线时空变化分析[J].北京师范大学学报（自然科学版）,2019,55(1):83-100,18.基金项目
Supported by the Chinese Arctic and Antarctic Administration,the National Key R&D Program of China (2017YFA0604401) （2017YFA0604401）
National Basic Research Program of China (2012CB957704) （2012CB957704）
Fundamental Research Funds for the Central Universities (312231103) （312231103）
Discipline construction funds (31223110) （31223110）
Open Fund of State Key Laboratory of Remote Sensing Science (OFSLRSS201609). （OFSLRSS201609）
