气候变化领域集成服务门户(CCPortal): Study on failure mechanism of a plain irrigation reservoir soil bank slope under wind wave erosion

CCPortal

DOI	10.1007/s11069-021-04849-9
	Study on failure mechanism of a plain irrigation reservoir soil bank slope under wind wave erosion
	Qin, Zipeng; Lai, Yuanming; Tian, Yan
发表日期	2021
ISSN	0921-030X
EISSN	1573-0840
起始页码	567
结束页码	592
卷号	109 期号:1
英文摘要	The wind wave erosion is one of the main factors of the soil bank slope retreat in plain irrigation reservoirs, which plays an important role in the bank profile evolution and seriously affects the agricultural irrigation. To study the failure mechanism induced by the wind wave erosion, a reservoir soil bank slope is taken as a research object. Through the field investigations, laboratory tests and prototype observations, a mechanical model of the bank slope recession under the wind wave erosion is established and verified by the field observation results. On this basis, the finite element method is utilized to analyze its stability in different erosion periods, and the evolution law of the safety factors with erosion time is revealed quantitatively. The results show that the lateral retreat of the slope foot will lead to local collapse and form vertical surfaces when eroded by wind waves. Based on the monitoring data in April 2019, the calculated lateral erosion distance is 1.29 m after the wind wave erosion lasts for 9 h, and the vertical surface height reaches 3.10 m, resulting in the bank slope failure. After failure, it is reshaped, and the stability is significantly improved. However, the new slope will face the instability risk of the former one when eroded by wind waves again. The stability safety factors generally show cyclical variation with the wave erosion time. The failure and retreat of the bank slope repeat the above cycle annually.
英文关键词	Safety factor; Wave erosion; Vertical plane; Wind velocity; Bank slope instability; Irrigation reservoir
语种	英语
WOS研究方向	Geology ; Meteorology & Atmospheric Sciences ; Water Resources
WOS类目	Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences ; Water Resources
WOS关键词	CLIFF EROSION ; MODEL ; COAST ; STABILITY ; RECESSION ; SEDIMENTS ; ZONE ; BAY
WOS记录号	WOS:000666844200001
来源期刊	NATURAL HAZARDS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239555
作者单位	[Qin, Zipeng; Lai, Yuanming] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China; [Qin, Zipeng; Lai, Yuanming] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Tian, Yan] Lanzhou Univ, Coll Civil Engn & Mech, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Qin, Zipeng,Lai, Yuanming,Tian, Yan. Study on failure mechanism of a plain irrigation reservoir soil bank slope under wind wave erosion[J],2021,109(1).
APA	Qin, Zipeng,Lai, Yuanming,&Tian, Yan.(2021).Study on failure mechanism of a plain irrigation reservoir soil bank slope under wind wave erosion.NATURAL HAZARDS,109(1).
MLA	Qin, Zipeng,et al."Study on failure mechanism of a plain irrigation reservoir soil bank slope under wind wave erosion".NATURAL HAZARDS 109.1(2021).