A comparison study of one-and two-dimensional hydraulic models for river environments.

Details

• Alternative Title:
  A comparison study of one-and two-dimensional hydraulic models for river environments : appendix.
• Creators:
  Deal, Evan C. ; Parr, A. David ; Young, C. Bryan
• Corporate Creators:
  University of Kansas. Dept. of Civil, Environmental and Architectural Engineering
• Corporate Contributors:
  Kansas. Dept. of Transportation. Bureau of Research
• Subject/TRT Terms:
  • Rivers
  • Streamflow
  • Hydrologic phenomena
  • Mathematical models
  • Bridges
  • Two dimensional flow
  • Flow
  • Computer models
  • Hydraulic Modeling
  • One-Dimensional Hydraulic Model
  More +
• Publication/ Report Number:
  Report No. KS-17-02
• Resource Type:
  Tech Report
• Geographical Coverage:
  Kansas ; United States
• Corporate Publisher:
  Kansas. Dept. of Transportation. Bureau of Research
• Abstract:
  Computer models are used every day to analyze river systems for a wide variety of reasons vital to ; the public interest. For decades most hydraulic engineers have been limited to models that simplify the fluid ; mechanics to the unidirectional case. With the advent of higher quality data and greater computational ; power, two-dimensional hydrodynamic models have become practical for widespread use. Two such models ; are considered in this report: HEC-RAS v.5.0, v.5.0.1, and v.5.0.3, and SRH-2D v.3.0. These twodimensional ; models were compared to the most common one-dimensional model (HEC-RAS). While the ; latest version of HEC-RAS is capable of both one- and two-dimensional analyses, previous versions were ; restricted to one-dimensional flow. Findings in this report include: differences in the flow divisions for ; multiple opening bridges for all three models, less subjectivity in the construction of the 2D models than for ; the 1D, differences in the sensitivity of each 2D model to the Manning’s roughness coefficient, great ; similarity in the expansion and contraction rates at bridges for the 2D models when using the full momentum ; equations with HEC-RAS 2D, differences in the response of the two-dimensional models at steady state ; conditions to vortex shedding through bridge openings with cylindrical piers, shorter computation times for ; HEC-RAS 2D than SRH-2D using highly comparable model setups, and in general, higher depths predicted ; by SRH-2D than HEC-RAS 1D but the highest depths overall predicted by the HEC-RAS 2D full ; momentum model.
  More +
• Format:
  PDF
• Funding:
  C2062
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/32362/dot_32362_DS1.pdf
• File Type:
  [PDF - 7.98 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:4addd23286e53540090e665f22c92b91c09e0da9ffbd79105feaeb4bcc05dd29