摘要
随着社会经济的发展,沿海地区建设速度飞快,海岸线也在不断发生变化。通过以江苏省连云港市沿海区域为研究对象,使用高分一号卫星影像数据,对该区域2013年和2019年两个时相的影像对比分析。利用归一化水体指数(NDWI)对影像进行处理,依据阈值分割法进行水陆分离,得到二值化图像,结合目视解译勾选海岸线的半自动海岸线提取方法,得到两个时相研究区域瞬时水边线矢量数据,并对近岸变化进行检测。最终提取2013年和2019年的影像海岸线矢量长度分别为218.80km和236.63 km,表明研究区域的海岸线在2013—2019年间长度增加了17.83 km。同时沿岸河口及盐田附近的淤泥质潮滩海岸岸线增长,近岸港口、码头等相关建设增多。
With the development of social economy,the construction speed of coastal areas is fast,and the coastline is changing constantly.In this study,the coastal region of Lianyungang city,Jiangsu province is taken as the research object,and GF-1 satellite image data are used to conduct comparative analysis of the time-phase images of this region in 2013 and 2019.Images were processed by using the normalized water body index(NDWI),water and land were separated according to the threshold segmentation method,and binary images were obtained.Combined with the semi-automatic shoreline extraction method of visual interpretation and ticking of shoreline,vector data of instantaneous water boundary line in the two time-phase study areas were obtained,and near-shore changes were detected.Finally extract images of 2013 and 2019,the coast were 218.80 km,236.63 km,vector length,suggests that the coastline of the study area in 2013—201917.83 km length increased.At the same time,the coastal estuary and salt pan near the silt tidal shoreline growth,inshore port,wharf and other related construction increased.
作者
纪轩禹
李旭文
姜晟
王甜甜
张悦
JI Xuan-yu;LI Xu-wen;JIANG Sheng;WANG Tian-tian;ZHANG Yue(Jiangsu Provincial Environmental Monitoring Center,Nanjing 210019,China)
出处
《环境生态学》
2019年第8期42-48,共7页
Environmental Ecology
基金
国家水体污染控制与治理科技重大专项基金资助项目(2017ZX07302-003)
2018年太湖水污染治理省级专项资金科研课题(TH2018304)
江苏省环境监测科研基金项目(1901)
江苏省环境监测科研基金项目(1913)资助.
关键词
遥感影像
海岸线提取
半自动信息提取
阈值分割
二值化
remote sensing image
shoreline extraction
semi-automatic information extraction
threshold segmentation
binarization
作者简介
纪轩禹(1992-),男,黑龙江肇东人,硕士,助理工程师,主要研究方向为遥感数据处理与分析;通讯作者:李旭文,E-mail:lixunwen@jshb.gov.cn。
