Study on failure mechanism of a plain irrigation reservoir soil bank slope under wind wave erosion

Zipeng Qin, Yuanming Lai () and Yan Tian
Additional contact information
Zipeng Qin: Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences
Yuanming Lai: Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences
Yan Tian: Lanzhou University

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2021, vol. 109, issue 1, No 25, 567-592

Abstract: Abstract 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.

Keywords: Safety factor; Wave erosion; Vertical plane; Wind velocity; Bank slope instability; Irrigation reservoir (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
http://link.springer.com/10.1007/s11069-021-04849-9 Abstract (text/html)
Access to the full text of the articles in this series is restricted.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:spr:nathaz:v:109:y:2021:i:1:d:10.1007_s11069-021-04849-9

Ordering information: This journal article can be ordered from
http://www.springer.com/economics/journal/11069

DOI: 10.1007/s11069-021-04849-9

Access Statistics for this article

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards is currently edited by Thomas Glade, Tad S. Murty and Vladimír Schenk

More articles in Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards from Springer, International Society for the Prevention and Mitigation of Natural Hazards
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().