Accretion-Erosion Dynamics of the Yellow River Delta and the Relationships with Runoff and Sediment from 1976 to 2018

doi:10.3390/w12112992

	Accretion-Erosion Dynamics of the Yellow River Delta and the Relationships with Runoff and Sediment from 1976 to 2018
	Li, He; Huang, Chong; Liu, Qingsheng; Liu, Gaohuan
刊名	WATER
	2020-11-01
卷号	12 期号:11 页码:23
关键词	YRD water-sediment regulation Landsat Google Earth Engine coastline accretion– erosion area
DOI	10.3390/w12112992
通讯作者	Huang, Chong(huangch@lreis.ac.cn)
英文摘要	Timely understanding of the coastal accretion-erosion dynamics of the Yellow River Delta (YRD) can not only deepen the understanding of the evolution of the delta but also provide scientific support for water-sediment regulation (WSR) in the lower reaches of Yellow River and the implementation of a protection strategy for the Yellow River Estuary. In this long-term study, Landsat images from 1976 to 2018 were acquired, and the cloud processing platform of the Google Earth Engine was used for extraction of coastlines. On the basis of these coastlines, the area and accretion-erosion dynamics were analyzed. Then, after statistical analysis of the interannual and intra-annual variations in runoff and sediment, we discuss the relationship between the accretion-erosion dynamics and the annual runoff and sediment. The results show that (1) the coastline of the YRD lengthened first and then shortened, and the average annual growth rate was 1.48 km/a. (2) The land area of the YRD showed a significant accretionary trend before 1996, with an average annual growth rate of 28.60 km(2)/a. Then, the area gradually decreased from 1997 to 2001. After WSR was implemented in 2002, the accretion-erosion dynamics gradually became smooth, with an annual growth rate of 0.31 km(2)/a. (3) After WSR, the maximum annual sedimentation decreased by 79.70%. The average annual sediment discharge accounted for only 6.69% from November to March of the following year during the non-flood season. (4) With the continuous decrease in sediment discharge, the determination coefficient (R-2) between the cumulative accretion-erosion area of the estuary and the annual sedimentation decreased from 0.98 in 1976-1996 to 0.77 after 2002. Overall, although WSR has maintained a steady increase in delta land area, it cannot change the long-term decrease in the land area of the delta. The insights gained from our study can provide some references for related coastline research, and will be useful to science community and decision makers for coastal environmental monitoring, management, protection, and sustainable development of the YRD.
资助项目	Science and Technology Basic Resources Investigation Program of China[2017YFD0300403] ; Science and Technology Basic Resources Investigation Program of China[2017FY100706] ; National Natural Science Foundation of China[41890854] ; National Natural Science Foundation of China[41801353] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA23050101]
WOS关键词	REGULATION SCHEME ; CLIMATE-CHANGE ; HUANGHE RIVER ; LOWER REACHES ; LOAD ; EVOLUTION ; IMPACTS ; IMPLEMENTATION ; PROGRADATION ; COASTLINE
WOS研究方向	Water Resources
语种	英语
出版者	MDPI
WOS记录号	WOS:000594223000001
资助机构	Science and Technology Basic Resources Investigation Program of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/156489]
专题	中国科学院地理科学与资源研究所
通讯作者	Huang, Chong
作者单位	Chinese Acad Sci, State Key Lab Resources & Environm Informat Syst, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Li, He,Huang, Chong,Liu, Qingsheng,et al. Accretion-Erosion Dynamics of the Yellow River Delta and the Relationships with Runoff and Sediment from 1976 to 2018[J]. WATER,2020,12(11):23.
APA	Li, He,Huang, Chong,Liu, Qingsheng,&Liu, Gaohuan.(2020).Accretion-Erosion Dynamics of the Yellow River Delta and the Relationships with Runoff and Sediment from 1976 to 2018.WATER,12(11),23.
MLA	Li, He,et al."Accretion-Erosion Dynamics of the Yellow River Delta and the Relationships with Runoff and Sediment from 1976 to 2018".WATER 12.11(2020):23.