Modeling downstream fining in sand-bed rivers. I: Formulation

S. Wright, G. Parker

Research output: Contribution to journalArticlepeer-review


In this paper a numerical modeling formulation is presented for simulation of the development of the longitudinal profile and bed sediment distribution in sand-bed rivers. The objective of the model application, which is presented in the companion paper (Wright and Parker, 2005), is to study the development of two characteristics of large, low-slope, sand-bed rivers: (1) a downstream decrease in bed slope (i.e. concave upward longitudinal profile) and (2) a downstream decrease in characteristic bed sediment diameter (e.g. the median bed surface size D50). Three mechanisms that lead to an upward concave profile and downstream fining are included in the modeling formulation: (1) a delta prograding into standing water at the downstream boundary, (2) sea-level rise, and (3) tectonic subsidence. In the companion paper (Wright and Parker, 2005) the model is applied to simulate the development of the longitudinal profile and downstream fining in sand-bed rivers flowing into the ocean during the past 5000 years of relatively slow sea-level rise.

Original languageEnglish (US)
Pages (from-to)613-620
Number of pages8
JournalJournal of Hydraulic Research
Issue number6
StatePublished - 2005
Externally publishedYes


  • Downstream fining
  • Modeling formulation
  • Sand-bed rivers

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Water Science and Technology


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