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The erosion processes of gully beds and its influences on headcut retreat based on an in-situ scouring experiment
Yifan Dong; Donghong Xiong; Zhengan Su
Corresponding AuthorYifan Dong
Source Publication1st World Conference on Soil and Water Conservation under Global Change-CONSOWA
Conference Date2017-6
Conference PlaceLleida, Spain
Funding OrganizationUniversity of Lleida
Headcut retreat is one of the important processes of gully erosion, which leads to intensive sediment  yield and threaten the soil quality of a region (Oostwoud Wijdenes et al., 2000; Vandekerckhove et al., 2001; 2003). The waterfall at the headcuts dissipated flow kinetic energy to gully beds and formed plunge pools right under the headcuts (Stein et al., 1993). The development of plunge pools caused rill headcut migration to upstream drainage area (Bennett et al., 1999), and the shape factors were applied to predict the linear headcut retreat rates of rills (Alonso et al., 2002). Flores-Cervantes et al (2006) extended the model to hillslope gully heads in the model channel-hillslope integrated
landscape development (CHILD). Campo-Bescos et al (2013) calibrated the model in northeast Spain and found the differences between field observation and model simulation were only 0.05 m3 year-1. While the plunge pools were not typical in some gullies in fields, and how to predict the headcut erosion rates without shape factors of plunge pools needs further study. The aim of this study is to detect the relationships between headcut retreat rate and flow hydraulics and erosion processes of gully beds, and find out the key influencing factors on gully head eroison based on an in-situ scouring experiment on 5 simulated gully heads in Dry-hot valley in southwest China.
KeywordGully Headcut Retreat Hydraulics
Indexed By其他
Document Type会议论文
AffiliationKey Laboratory of Mountain Hazards & Surface Process, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, 610041, Chengdu, China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Yifan Dong,Donghong Xiong,Zhengan Su. The erosion processes of gully beds and its influences on headcut retreat based on an in-situ scouring experiment[C],2017:409-412.
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