Generalized Exner equation for the conservation of sediment mixtures

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

Abstract

The Exner equation of sediment conservation is the basis upon which river morphodynamics stands. In the case of mixtures of different sediment sizes it is customary to formulate sediment conservation in terms multiple discrete layers stacked in the vertical. In the simplest of these formulations, the bed is divided into two layers; an "active" ("surface," "exchange") layer, which directly exchanges sediment with the water column and a "storage" ("substrate") layer below which exchanges sediment with the active layer by means of aggradation and degradation. The discrete layers of such active layer formulations, however, are a gross simplification of the vertical structure of a bed deposit, which should show a continuous variation in the vertical when averaged over area. Here the discrete active layer formulation is replaced by a fully continuous probabilistic formulation. Copyright ASCE 2004.

Original languageEnglish (US)
Title of host publicationJoint Conference on Water Resource Engineering and Water Resources Planning and Management 2000
Subtitle of host publicationBuilding Partnerships
DOIs
StatePublished - Dec 1 2004
Externally publishedYes
EventJoint Conference on Water Resource Engineering and Water Resources Planning and Management 2000 - Minneapolis, MN, United States
Duration: Jul 30 2000Aug 2 2000

Publication series

NameJoint Conference on Water Resource Engineering and Water Resources Planning and Management 2000: Building Partnerships
Volume104

Other

OtherJoint Conference on Water Resource Engineering and Water Resources Planning and Management 2000
CountryUnited States
CityMinneapolis, MN
Period7/30/008/2/00

Keywords

  • Conservation
  • Equations of motion
  • Fluid dynamics
  • Mixtures
  • Rivers
  • Sediment transport

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Water Science and Technology
  • Geography, Planning and Development

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