Analysis of the Influence Relationship for the Earth Dam-Break Outflow Estimation Parameters

Liu Jie, Xu Jiajun, He Hujun, Li Xuewei

2022

Abstract

In order to exploration the relationship between breach hydrograph and other breach parameters, a series earth dam-break experimental with spatial breach overtopping tests were conducted in an 4m wide, 50m long and 2m high with glass side-walls flume at the State Key Laboratory of Hydraulics and Mountain River Engineering of Sichuan University. An industry camera and two digital video recorders were used to record the dam breach process, and the Large-Scale Particle Image Velocimetry (LSPIV) technique was introduced to measure water surface velocity of dam breach. The results showed that the dam breach process can be divided into two stages, the main feature of first stage was “headcut” while the second stage was“surface” erosion. The length rate of CSC and CS was approximately 0.85 at peaking discharge moment in the present study. The breach hydrograph may be the function of breach water width and breach water velocity. The breach water depth can be estimated by using h t z t X t z c w c d ( ) ( ) ( ) tan , and the breach depth at 100s was approximately equal to 13cm based on this formula. The time of breach peak discharge was nearly the same as the breach width reach the maximum. However, there was about 30s time lag for breach peak discharge relative to time of peak breach water surface velocity

Paper Citation

in Harvard Style

Jie L., Jiajun X., Hujun H. and Xuewei L. (2022). Analysis of the Influence Relationship for the Earth Dam-Break Outflow Estimation Parameters. In Proceedings of the 3rd International Symposium on Water, Ecology and Environment - Volume 1: ISWEE; ISBN 978-989-758-639-2, SciTePress, pages 150-155. DOI: 10.5220/0011950300003536

in Bibtex Style

@conference{iswee22,
author={Liu Jie and Xu Jiajun and He Hujun and Li Xuewei},
title={Analysis of the Influence Relationship for the Earth Dam-Break Outflow Estimation Parameters},
booktitle={Proceedings of the 3rd International Symposium on Water, Ecology and Environment - Volume 1: ISWEE},
year={2022},
pages={150-155},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0011950300003536},
isbn={978-989-758-639-2},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 3rd International Symposium on Water, Ecology and Environment - Volume 1: ISWEE
TI - Analysis of the Influence Relationship for the Earth Dam-Break Outflow Estimation Parameters
SN - 978-989-758-639-2
AU - Jie L.
AU - Jiajun X.
AU - Hujun H.
AU - Xuewei L.
PY - 2022
SP - 150
EP - 155
DO - 10.5220/0011950300003536
PB - SciTePress