Land subsidence of the Yellow River Delta in China driven by river sediment compaction

doi:10.1016/j.scitotenv.2020.142165

IOCAS-IR > 海洋地质与环境重点实验室

	Land subsidence of the Yellow River Delta in China driven by river sediment compaction
	Liu, Yilin1,2,3 ; Liu, Jinqing 1,2; Xia, Xingfan 4; Bi, Haibo 3; Huang, Haijun 3,5; Ding, Renwei 1; Zhao, Lihong 1
	2021
发表期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
卷号	750 页码:12
通讯作者	Liu, Jinqing([email protected])
摘要	Many of the world's largest deltas are sinking due to multiple natural and anthropogenic causes. This is particularly evident for the modern Yellow River Delta (YRD) in China, which is one of the most dynamic coastal systems on Earth. The YRD has experienced complicated patterns of accretion and erosion as well as significant compaction settlements. However, spatiotemporal variability and the long-term settlement rates law in this complex delta system remain poorly understood. Evidently, the surface settlement is supposedly controlled by a longterm natural compaction process of sediments. We first combined the Small Baseline Subset (SBAS) Interferometric Synthetic Aperture Radar (InSAR) method with a geotechnical model and geological, geomorphological, hydrogeological, and geotechnical data to assess the delta-wide long-term spatiotemporal settlement triggered by the consolidation and compaction of river sediments. The combination of satellite and field observations allows us to gain insights into the primary processes controlling surface movement. A total of seventy-five SAR images acquired by ERS and Envisat from 1992 to 2010 are used to generate three independent interferometric subsets calibrated with leveling to unveil spatiotemporal settlement variability. The densely distributed spatiotemporal measurements enable us to acquire the characteristics of the spatiotemporal variations of land movements. Moreover, the annual average settlement rates are observed within a range of 0 to >30 mm. Results suggest that the relative inland stability of the delta contrasts with the decreasing coastal margin trend at an average annual rate of 15mm. Moreover, the variability is significantly correlated with the delta evolution and variations in subsoil architecture. A comparative analysis has also been conducted between time series InSAR measurements and the theoretical estimates of settlement derived from the geotechnical model. The strong agreement between the InSAR measurements and the geotechnical modeled results indicates that long-term settlement (in a decade-to-century scale) is primarily driven by the compaction of river sediments. The more the delta sub-lobe was newly formed, the more significant the settlement. Decreasing trends in annual settlement rates from approximately 70 mm to 0 mm in the long-term deposit compaction process are also identified. These findings are useful to understand the YRD morphological evolution and may provide insights into the changes in other deltas worldwide. (C) 2020 Elsevier B.V. All rights reserved.
关键词	Deltaic subsidence variability Advanced InSAR Sediment compaction Geotechnical investigation Delta evolution The Yellow River Delta
DOI	10.1016/j.scitotenv.2020.142165
收录类别	SCI
语种	英语
资助项目	European Space Agency[C1F.19709]; National Natural Science Foundation of China[41706092]; National Natural Science Foundation of China[41706074]; National Natural Science Foundation of China[41276082]; National Natural Science Foundation of China[41306190]
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000585694600115
出版者	ELSEVIER
引用统计	被引频次：49[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/169271
专题	海洋地质与环境重点实验室
通讯作者	Liu, Jinqing
作者单位	1.Shandong Univ Sci & Technol, Coll Earth Sci & Engn, Qingdao 266590, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao 266237, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 4.China Univ Petr East China, Oil Ind Training Ctr, Qingdao 266580, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
第一作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Liu, Yilin,Liu, Jinqing,Xia, Xingfan,et al. Land subsidence of the Yellow River Delta in China driven by river sediment compaction[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2021,750:12.
APA	Liu, Yilin.,Liu, Jinqing.,Xia, Xingfan.,Bi, Haibo.,Huang, Haijun.,...&Zhao, Lihong.(2021).Land subsidence of the Yellow River Delta in China driven by river sediment compaction.SCIENCE OF THE TOTAL ENVIRONMENT,750,12.
MLA	Liu, Yilin,et al."Land subsidence of the Yellow River Delta in China driven by river sediment compaction".SCIENCE OF THE TOTAL ENVIRONMENT 750(2021):12.

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