Natural Hazards and Earth System Sciences
Natural Hazards
and Earth System Sciences
Natural Hazards
and Earth System Sciences
Articles | Volume 20, issue 12
Articles | Volume 20, issue 12
Nat. Hazards Earth Syst. Sci., 20, 3293–3314, 2020
https://doi.org/10.5194/nhess-20-3293-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Nat. Hazards Earth Syst. Sci., 20, 3293–3314, 2020
https://doi.org/10.5194/nhess-20-3293-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 20, issue 12

Research article 04 Dec 2020

Research article | 04 Dec 2020

Open check dams and large wood: head losses and release conditions

Guillaume Piton et al.

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Short summary
Open check dams are flood protection structures trapping sediment and large wood. Large wood obstructs openings of dams, thus increasing flow levels. If flow levels become higher than the dam crest, the trapped large wood may overtop the structure and be suddenly released downstream, which may also eventually obstruct downstream bridges. This paper is based on experiments on small-scale models. It shows how to compute the increase in flow level and conditions leading to sudden overtopping.
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