General Coastline Extraction Based on an Improved Active Contour Model in Jiaozhou Bay, Qingdao, China, from 1990 to 2018 Using Landsat Satellite Images

The coastline is located at the junction of the sea and the land, and it is essential for ecological environment. However, most existing methods can extract the coastline with obvious boundaries and cannot obtain the general coastline, including an intertidal zone and salt field. Accordingly, a new...

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Autores principales:	Jie Dong, Jiani Fu, Yong Guan, Haisong Liu, Qing Wang, Ming Hao
Formato:	article
Lenguaje:	EN
Publicado:	Hindawi Limited 2021
Materias:	Renewable energy sources TJ807-830
Acceso en línea:	https://doaj.org/article/c7da9a4a43ef4128a4cb3a9c8b2de4af
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spelling	oai:doaj.org-article:c7da9a4a43ef4128a4cb3a9c8b2de4af2021-11-08T02:37:26ZGeneral Coastline Extraction Based on an Improved Active Contour Model in Jiaozhou Bay, Qingdao, China, from 1990 to 2018 Using Landsat Satellite Images1687-529X10.1155/2021/5459210https://doaj.org/article/c7da9a4a43ef4128a4cb3a9c8b2de4af2021-01-01T00:00:00Zhttp://dx.doi.org/10.1155/2021/5459210https://doaj.org/toc/1687-529XThe coastline is located at the junction of the sea and the land, and it is essential for ecological environment. However, most existing methods can extract the coastline with obvious boundaries and cannot obtain the general coastline, including an intertidal zone and salt field. Accordingly, a new general coastline extraction method is proposed on the basis of an improved active contour model to extract the general coastline from remote sensing images. An improved active contour model was proposed to extract the water area by introducing aiming energy of water from the Modified Normalized Difference Water Index information. Then, mathematical morphology was applied to obtain the seawater area based on the extracted water area. Finally, the coastline was refined and generated by the improved active contour model in a buffer zone of the seawater boundary. Landsat images over Jiaozhou Bay in Shandong Province, China, from 1990 to 2018 were used to extract the general coastline. Results demonstrate that the proposed method can effectively extract the general coastline, which is close to the reference coastline. The length of the coastline decreased from 234.64 km in 1990 to 221.21 km in 2000. This value significantly increased to 255.05 km from 2000 to 2010. The main reason is that Hongdao Island merged with the mainland due to reclamation. The length of the coastline slightly decreased by approximately 12 km from 2010 to 2018 due to environmental protection measures and the reclamation prohibition.Jie DongJiani FuYong GuanHaisong LiuQing WangMing HaoHindawi LimitedarticleRenewable energy sourcesTJ807-830ENInternational Journal of Photoenergy, Vol 2021 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Renewable energy sources TJ807-830
spellingShingle	Renewable energy sources TJ807-830 Jie Dong Jiani Fu Yong Guan Haisong Liu Qing Wang Ming Hao General Coastline Extraction Based on an Improved Active Contour Model in Jiaozhou Bay, Qingdao, China, from 1990 to 2018 Using Landsat Satellite Images
description	The coastline is located at the junction of the sea and the land, and it is essential for ecological environment. However, most existing methods can extract the coastline with obvious boundaries and cannot obtain the general coastline, including an intertidal zone and salt field. Accordingly, a new general coastline extraction method is proposed on the basis of an improved active contour model to extract the general coastline from remote sensing images. An improved active contour model was proposed to extract the water area by introducing aiming energy of water from the Modified Normalized Difference Water Index information. Then, mathematical morphology was applied to obtain the seawater area based on the extracted water area. Finally, the coastline was refined and generated by the improved active contour model in a buffer zone of the seawater boundary. Landsat images over Jiaozhou Bay in Shandong Province, China, from 1990 to 2018 were used to extract the general coastline. Results demonstrate that the proposed method can effectively extract the general coastline, which is close to the reference coastline. The length of the coastline decreased from 234.64 km in 1990 to 221.21 km in 2000. This value significantly increased to 255.05 km from 2000 to 2010. The main reason is that Hongdao Island merged with the mainland due to reclamation. The length of the coastline slightly decreased by approximately 12 km from 2010 to 2018 due to environmental protection measures and the reclamation prohibition.
format	article
author	Jie Dong Jiani Fu Yong Guan Haisong Liu Qing Wang Ming Hao
author_facet	Jie Dong Jiani Fu Yong Guan Haisong Liu Qing Wang Ming Hao
author_sort	Jie Dong
title	General Coastline Extraction Based on an Improved Active Contour Model in Jiaozhou Bay, Qingdao, China, from 1990 to 2018 Using Landsat Satellite Images
title_short	General Coastline Extraction Based on an Improved Active Contour Model in Jiaozhou Bay, Qingdao, China, from 1990 to 2018 Using Landsat Satellite Images
title_full	General Coastline Extraction Based on an Improved Active Contour Model in Jiaozhou Bay, Qingdao, China, from 1990 to 2018 Using Landsat Satellite Images
title_fullStr	General Coastline Extraction Based on an Improved Active Contour Model in Jiaozhou Bay, Qingdao, China, from 1990 to 2018 Using Landsat Satellite Images
title_full_unstemmed	General Coastline Extraction Based on an Improved Active Contour Model in Jiaozhou Bay, Qingdao, China, from 1990 to 2018 Using Landsat Satellite Images
title_sort	general coastline extraction based on an improved active contour model in jiaozhou bay, qingdao, china, from 1990 to 2018 using landsat satellite images
publisher	Hindawi Limited
publishDate	2021
url	https://doaj.org/article/c7da9a4a43ef4128a4cb3a9c8b2de4af
work_keys_str_mv	AT jiedong generalcoastlineextractionbasedonanimprovedactivecontourmodelinjiaozhoubayqingdaochinafrom1990to2018usinglandsatsatelliteimages AT jianifu generalcoastlineextractionbasedonanimprovedactivecontourmodelinjiaozhoubayqingdaochinafrom1990to2018usinglandsatsatelliteimages AT yongguan generalcoastlineextractionbasedonanimprovedactivecontourmodelinjiaozhoubayqingdaochinafrom1990to2018usinglandsatsatelliteimages AT haisongliu generalcoastlineextractionbasedonanimprovedactivecontourmodelinjiaozhoubayqingdaochinafrom1990to2018usinglandsatsatelliteimages AT qingwang generalcoastlineextractionbasedonanimprovedactivecontourmodelinjiaozhoubayqingdaochinafrom1990to2018usinglandsatsatelliteimages AT minghao generalcoastlineextractionbasedonanimprovedactivecontourmodelinjiaozhoubayqingdaochinafrom1990to2018usinglandsatsatelliteimages
_version_	1718443040600752128

General Coastline Extraction Based on an Improved Active Contour Model in Jiaozhou Bay, Qingdao, China, from 1990 to 2018 Using Landsat Satellite Images

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