Nonconnah Creek Sedimentation Study, Analysis Using a Numerical Modeling Approach

Abstract

This is a sedimentation analysis of a local flood protection project extending for about 20 miles along Nonconnah Creek, Memphis, TN. It was performed using the US Army Engineer Waterways Experiment Station version of the numerical model, HEC-6. This investigation is considered to be an analysis rather than a numerical sedimentation model study because Nonconnah Creek has been too highly disturbed over the past several decades to permit model confirmation. The justification for using the HEC-6 computer program as an analytical tool stems from its treatment of movable boundary hydraulics processes and its capability to analyze the project reach, the approach channel, and the exit channel as a stream system. The results show the project reach to be more stable than that reach would be without the project; however, the project channel invert shows a degradation trend. Both the design flood hydrograph and a 30-year period of record synthesized from rainfall were used in the analysis.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1990
Accession Number
ADA217876

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  • William A. Thomas

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  • Cyber
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Aerial Photographs
  • Computer Programs
  • Computers
  • Depth Ratings
  • Engineers
  • Floods
  • Measurement
  • Models
  • Particle Size
  • Photographs
  • Photography
  • Plastic Explosives
  • Prototypes
  • Reconnaissance
  • Sedimentation
  • Suspended Sediments
  • Waterways

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  • Coastal and Marine Engineering/Sediment Transport/Hydraulic Engineering
  • Theoretical Analysis.