Flow Transitions in Bridge Backwater Analysis.
Abstract
Bridges across floodplains may require special attention in one-dimensional hydraulic modeling if they cause severe contraction and expansion of the flow. The accurate prediction of the energy losses in the contraction reach upstream of the bridge and the expansion reach downstream of the bridge using one-dimensional models presents particular difficulty. Modeling these reaches requires the accurate evaluation of four parameters: the expansion reach length, L; the contraction reach length, L; the expansion coefficient, Co; and the contraction coefficient, Cc. This report presents research conducted by the author to investigate these four parameters through the use of field data, two-dimensional hydraulic modeling, and one-dimensional modeling.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1995
- Accession Number
- ADA311054
Entities
People
- Gary W. Brunner
- John H. Hunt