Modelling of bedrock river evolution

C. T. Liao, K. C. Yeh, M. W. Huang

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

2 Scopus citations

Abstract

Steep slope and severe bed change are the characteristics of mountain rivers. These characteristics often cause the bed armor layer flushed away, make the bedrock exposed, and then increase the channel incision. Hydraulic models of past few decades often aimed at the sediment transport of alluvial channel. In this paper, a modelling concept for bedrock river evolution is proposed, which is based on a two-dimensional mobile-bed model, called the explicit finite analytic model (EFA). Due to the proposed modelling concept, the EFA model can consider both phenomena of severe erosion and cover effect of sediment over the bedrock. A new stream power bedrock incision rate formula is proposed. All required data were measured and tested from the field during the past three years. The results show that the proposed model has the capability of simulating morphological changes in the bedrock reach of Taan River, Taiwan.

Original languageEnglish
Title of host publication34th IAHR Congress 2011 - Balance and Uncertainty
Subtitle of host publicationWater in a Changing World, Incorporating the 33rd Hydrology and Water Resources Symposium and the 10th Conference on Hydraulics in Water Engineering
PublisherInternational Association for Hydro-Environment Engineering and Research (IAHR)
Pages4459-4467
Number of pages9
ISBN (Electronic)9780858258686
StatePublished - 1 Jan 2011
Event34th IAHR Congress 2011 - Balance and Uncertainty: Water in a Changing World, Incorporating the 33rd Hydrology and Water Resources Symposium and the 10th Conference on Hydraulics in Water Engineering - Brisbane, Australia
Duration: 26 Jun 20111 Jul 2011

Publication series

Name34th IAHR Congress 2011 - Balance and Uncertainty: Water in a Changing World, Incorporating the 33rd Hydrology and Water Resources Symposium and the 10th Conference on Hydraulics in Water Engineering

Conference

Conference34th IAHR Congress 2011 - Balance and Uncertainty: Water in a Changing World, Incorporating the 33rd Hydrology and Water Resources Symposium and the 10th Conference on Hydraulics in Water Engineering
CountryAustralia
CityBrisbane
Period26/06/111/07/11

Keywords

  • Bedrock river
  • Mobile-bed model
  • Stream power bedrock incision rate

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