Amplification of downstream flood stage due to damming of fine-grained rivers

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dc.creatorMa, Hongbo
dc.creatorNittrouer, Jeffrey A (TTU)
dc.creatorFu, Xudong
dc.creatorParker, Gary
dc.creatorZhang, Yuanfeng
dc.creatorWang, Yuanjian
dc.creatorWang, Yanjun
dc.creatorLamb, Michael P
dc.creatorCisneros, Julia
dc.creatorBest, Jim
dc.creatorParsons, Daniel R
dc.creatorWu, Baosheng
dc.date.accessioned2023-03-20T21:04:40Z
dc.date.available2023-03-20T21:04:40Z
dc.date.issued2022
dc.descriptionOpen Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.en_US
dc.description.abstractRiver dams provide many benefits, including flood control. However, due to constantly evolving channel morphology, downstream conveyance of floodwaters following dam closure is difficult to predict. Here, we test the hypothesis that the incised, enlarged channel downstream of dams provides enhanced water conveyance, using a case study from the lower Yellow River, China. We find that, although flood stage is lowered for small floods, counterintuitively, flood stage downstream of a dam can be amplified for moderate and large floods. This arises because bed incision is accompanied by sediment coarsening, which facilitates development of large dunes that increase flow resistance and reduce velocity relative to pre-dam conditions. Our findings indicate the underlying mechanism for such flood amplification may occur in >80% of fine-grained rivers, and suggest the need to reconsider flood control strategies in such rivers worldwide.en_US
dc.identifier.citationMa, H., Nittrouer, J.A., Fu, X. et al. Amplification of downstream flood stage due to damming of fine-grained rivers. Nat Commun 13, 3054 (2022). https://doi.org/10.1038/s41467-022-30730-9en_US
dc.identifier.urihttps://doi.org/10.1038/s41467-022-30730-9
dc.identifier.urihttps://hdl.handle.net/2346/91872
dc.language.isoengen_US
dc.subjectriver damsen_US
dc.subjectflood controlen_US
dc.subjectincisionen_US
dc.subjectchannel morphologyen_US
dc.subjectsediment coarseningen_US
dc.subjectflow resistanceen_US
dc.titleAmplification of downstream flood stage due to damming of fine-grained riversen_US
dc.typeArticleen_US

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