Automated Techniques for Quantification of Coastline Change Rates using Landsat Imagery along Caofeidian, China

35th International Symposium on Remote Sensing of Environment

地球科学;生态环境科学

Dong, Di^1 ; Li, Ziwei^1 ; Liu, Zhaoqin^1 ; Yu, Yang^1

State Key Laboratory of Remote Sensing Science, Chinese Academy of Sciences, Beijing Normal University, Beijing, China^1

关键词: Automated extraction;    Automated techniques;    Coastline extraction;    Construction projects;    Morphological changes;    Reclamation project;    Remote sensing techniques;    TM and ETM+ images;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/17/1/012103/pdf
DOI  :  10.1088/1755-1315/17/1/012103

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

This paper focuses on automated extraction and monitoring of coastlines by remote sensing techniques using multi-temporal Landsat imagery along Caofeidian, China. Caofeidian, as one of the active economic regions in China, has experienced dramatic change due to enhanced human activities, such as land reclamation. These processes have caused morphological changes of the Caofeidian shoreline. In this study, shoreline extraction and change analysis are researched. An algorithm based on image texture and mathematical morphology is proposed to automate coastline extraction. We tested this approach and found that it's capable of extracting coastlines from TM and ETM+ images with little human modifications. Then, the detected coastline vectors are imported into Arcgis software, and the Digital Shoreline Analysis System (DSAS) is used to calculate the change rate (the end point rate and linear regression rate). The results show that in some parts of the research area, remarkable coastline changes are observed, especially the accretion rate. The abnormal accretion is mostly attributed to the large-scale land reclamation during 2003 and 2004 in Caofeidian. So we can conclude that various construction projects, especially the land reclamation project, have made Caofeidian shorelines change greatly, far above the normal.