气候变化领域集成服务门户(CCPortal): Mapping changes in coastlines and tidal flats in developing islands using the full time series of Landsat images

CCPortal

DOI	10.1016/j.rse.2020.111665
	Mapping changes in coastlines and tidal flats in developing islands using the full time series of Landsat images
	Cao W.; Zhou Y.; Li R.; Li X.
发表日期	2020
ISSN	00344257
卷号	239
英文摘要	Insights into the dynamics of coastlines and tidal flats at fine spatial and temporal resolutions are essential for sustainable development. Previous studies were generally conducted at relatively coarse temporal intervals, which hardly captured detailed coastal dynamics, especially in rapidly developing islands. In this study, we developed a new method to map the monthly changes in coastlines and tidal flats in the Zhoushan Archipelago during 1985–2017 using the full time series of Landsat images based on the Google Earth Engine (GEE) platform. First, we built the full time series of the Modified Normalized Difference Water Index (MNDWI). Second, we derived temporal segments of MNDWI using a binary segmentation algorithm. Third, we classified the corresponding coastal cover types (i.e., water, tidal flats, and land) for each temporal segment based on the features of MNDWI and regional tidal heights. Finally, we identified the change information including conversion types, and turning years and months. Results indicate that the proposed method can well identify turning years with an overall accuracy of 90% and map coastal cover types with overall accuracies of 89–94% in 1985 and 87–92% in 2017. Significant coastline expansions and declines in tidal flats were found in the study area. The areas of water and tidal flats decreased by 6% and 10% during 1985–2017, respectively, while the land area increased by 18%. The land reclamation was accelerated in the recent decade, and mainly occurred on the medium-large islands, their surrounding small islands, and the islands close to the mainland. The proposed framework based on the GEE platform is transferable to investigate coastal dynamics in other areas. The derived information of changes in coastlines and tidal flats is of great use for sustainable management and ecological studies in coastal areas. © 2020 Elsevier Inc.
英文关键词	Change detection; East China; Full time series; Google Earth Engine; Island; Land reclamation
语种	英语
scopus关键词	Dynamics; Engines; Image segmentation; Land reclamation; Land use; Sustainable development; Tides; Time series; Binary segmentation; Change detection; East China; Google earths; Island; Modified Normalized Difference Water Index (MNDWI); Spatial and temporal resolutions; Sustainable management; Wetlands; accuracy assessment; algorithm; coastal zone; coastal zone management; land reclamation; Landsat; mapping method; segmentation; tidal flat; time series; Zhoushan Islands
来源期刊	Remote Sensing of Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/179436
作者单位	School of Earth Sciences, Zhejiang University, Hangzhou, Zhejiang 310027, China; Department of Geological and Atmospheric Sciences, Iowa State University, Ames, IA 50011, United States
推荐引用方式 GB/T 7714	Cao W.,Zhou Y.,Li R.,et al. Mapping changes in coastlines and tidal flats in developing islands using the full time series of Landsat images[J],2020,239.
APA	Cao W.,Zhou Y.,Li R.,&Li X..(2020).Mapping changes in coastlines and tidal flats in developing islands using the full time series of Landsat images.Remote Sensing of Environment,239.
MLA	Cao W.,et al."Mapping changes in coastlines and tidal flats in developing islands using the full time series of Landsat images".Remote Sensing of Environment 239(2020).