Natural Hazards and Earth System Sciences
Natural Hazards and Earth System Sciences
NHESS
Articles | Volume 16, issue 11
Articles | Volume 16, issue 11
https://doi.org/10.5194/nhess-16-2433-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/nhess-16-2433-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 16, issue 11
Research article
 | 
28 Nov 2016
Research article |  | 28 Nov 2016

Effects of Y-type spillway lateral contraction ratios on debris-flowpatterns and scour features downriver of a check dam

Huayong Chen, Jinfeng Liu, and Wanyu Zhao

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Short summary
A new type of spillway structure with lateral contraction was proposed to distribute debris flows after the check dam storage filled up. Experiments were performed to investigate debris flow movement, the scour feature, and some related hydraulic characteristics of debris flows under this new structure. The results indicate that this type of structure can help extend debris-flow nappe, dissipate flow energy, and reduce the scour depth downriver of a check dam.
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