Modeling Noncohesive Suspended Sediment Transport in Stream Channels Using an Ensemble-Averaged Conservation Equation

Impaired water wality in lakes and rivers, deterioration of municipal water supplies, and sedimentation of reservoirs and navigation channels are some of the reasons for enhancing one's understanding of sediment movement. The governing conservation equation for the transport of noncohesive suspended sediment in erodible channels is recognized as a stochastic partial differential equation due to the uncertainties in the parameters, and a deterministic ensemble-averaged equation is developed. Variables in this one-dimensional equation are represented as averaged quantities, and their covariances are also taken into account. Lateral inflows and deposition and entrainment of sediment are incorporated in the formulation. A hypothetical test problem is constructed to examine the model behavior. Manning's coefficient, bed slope and bottom width are taken as the primary random parameters. Results from the solution of the ensemble-averaged equation are compared to results from Monte Carlo simulations. For comparison purposes, predicted values are also obtained by solving the deterministic transport equation without the covariance terms. It is found that predictions obtained from this latter approach deviate significantly from Monte Carlo simulation results. On the other hand, the ensemble-averaged predictions compare favorably to the Monte Carlo simulation results indicating that this promising technique needs further exploration.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/8672558
• Authors:
  • Sharma, S
  • Kavvas, M L
• Publication Date: 2005-5-1

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References;
• Pagination: pp 380-389
• Serial:
  • Journal of Hydraulic Engineering
  • Volume: 131
  • Issue Number: 5
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-9429
  • Serial URL: https://ascelibrary.org/journal/jhend8

Subject/Index Terms

• TRT Terms: Mathematical models; Mathematical prediction; Monte Carlo method; Sedimentation; Simulation; Stochastic processes; Streambeds
• Uncontrolled Terms: Sediment transport; Stream channels
• Subject Areas: Data and Information Technology; Marine Transportation; Operations and Traffic Management; Terminals and Facilities;

Filing Info

• Accession Number: 01000523
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 2 2005 10:32AM