摘要
长江口崇明岛区域是我国海陆相互作用的重要地带,也是长江三角洲城市发展的重要土地资源。研究长江口崇明岛区域岸线变化规律并分析其成因,对整个长江三角洲地区的未来发展都有着重要的意义。以Landsat系列遥感影像为数据源,利用遥感(RS)和地理信息系统(GIS)技术,提取了1985—2019年长江口崇明岛区域5期岸线信息,研究其近34年间的时空变化,分析其岸线变化的主要原因。结果表明:(1)30多年来崇明岛区域岸线不断扩张,尤其是进入21世纪后变化明显。(2)岸线变化明显的区域主要集中在崇明岛北岸、崇明岛东滩以及长兴岛和横沙岛区域。(3)自然因素与人为因素共同作用导致了岸线的变化,在21世纪后,人为因素成为主导因素,岸线的变化已经与人类活动密切相关。
The Chongming Island area at the Yangtze Delta is an important area for sea-land interaction in China and also the critical land resource for the urban development of the Yangtze River Delta.It is of great significance for the future development of the entire Yangtze River Delta to study the change law of water front in Chongming Island area at the Yangtze Delta and analyze its causes.Based on Landsat series of remote sensing images as data resources,by using remote sensing(RS)and geographic information system(GIS)technology,the five-phase water front information of Chongming Island area at the Yangtze Delta from 1985 to 2019 was extracted to study the temporal and spatial changes in the past34 years and analyze the main reasons for the changes in water front.The results show that,(1)the water front in Chongming Island area has been expanding continuously for more than 30 years,especially since the beginning of the 21st century.(2)The areas with obvious changes in the water front are majorly located in the north shore and the east beach of Chongming Island,and Changxing Island and Hengsha Island.(3)These kinds of changes are resulted from the combined effect of natural factors and anthropic factors,and after the 21st century,the anthropic factors have been dominating the change of water front because of human activities.
作者
李俊凯
Li Junkai(School of Earth Science and Engineering,Hohai University,Nanjing 211100,China)
出处
《甘肃科学学报》
2020年第3期17-21,28,共6页
Journal of Gansu Sciences
关键词
长江口崇明岛区域
遥感
GIS
岸线提取
动态变化研究
Chongming Island area at the Yangtze Delta
Remote sensing
GIS
Water front extraction
Dynamic change research
