Relation between bankfull geometry of alluvial rivers and how duration curve

Kensuke Naito, Gary Parker

Research output: Chapter in Book/Report/Conference proceedingChapter


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 Hood discharge with a I-year to 2-year recurrence interval. The physics behind the relation between bankfull characteristics and (low 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 Bow duration curve, and secondarily with Hood 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 2016
Subtitle of host publicationIowa City, USA, July 11-14, 2016
PublisherCRC Press
Number of pages7
ISBN (Electronic)9781317289128
ISBN (Print)9781315644479
StatePublished - Jun 22 2016

ASJC Scopus subject areas

  • General Engineering


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