Relation between bankfull geometry of alluvial rivers and flow duration curve

Kensuke Naito, Gary Parker

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Bankfull characteristics have long been considered to be important parameters for characterizing alluvial rivers with floodplains. Empirical evidence suggests that the bankfull discharge of such streams often corresponds to a flood discharge with a 1-year to 2-year recurrence interval. The physics behind the relation between bankfull characteristics and flow hydrology, however, remains unexplained. Here we propose a new framework for modeling the formation processes of bankfull channel geometry, so as to relate bankfull characteristics primarily with flow duration curve, and secondarily with flood frequency. We hypothesize that a river tends to evolve toward an equilibrium state of channel-floodplain geometry at which sediment removal from the floodplain due to lateral channel migration is balanced against sediment emplacement on the floodplain due to overbank deposition. The proposed model has the potential to predict the change in bankfull characteristics in response to hydrologic change, as well as change in sediment supply.

Original languageEnglish (US)
Title of host publicationRiver Flow - Proceedings of the International Conference on Fluvial Hydraulics, RIVER FLOW 2016
EditorsDan Hanes, Marcelo Garcia, George Constantinescu
PublisherCRC Press/Balkema
Pages183-189
Number of pages7
ISBN (Print)9781138029132
StatePublished - Jan 1 2016
EventInternational Conference on Fluvial Hydraulics, RIVER FLOW 2016 - St. Louis, United States
Duration: Jul 11 2016Jul 14 2016

Publication series

NameRiver Flow - Proceedings of the International Conference on Fluvial Hydraulics, RIVER FLOW 2016

Other

OtherInternational Conference on Fluvial Hydraulics, RIVER FLOW 2016
CountryUnited States
CitySt. Louis
Period7/11/167/14/16

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ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Geotechnical Engineering and Engineering Geology

Cite this

Naito, K., & Parker, G. (2016). Relation between bankfull geometry of alluvial rivers and flow duration curve. In D. Hanes, M. Garcia, & G. Constantinescu (Eds.), River Flow - Proceedings of the International Conference on Fluvial Hydraulics, RIVER FLOW 2016 (pp. 183-189). (River Flow - Proceedings of the International Conference on Fluvial Hydraulics, RIVER FLOW 2016). CRC Press/Balkema.