Assessment of the effects of regional channel stability and sediment transport on roadway hydraulic structures : final report.

Details

• Creators:
  Liu, Xiaofeng ; Ashraf, Fahmidah ; Strom, Kyle B. ; Wang, Keh-Han ; Jean-Louis Briaud, ; Sharif, Hatim ; Bin-Shafique, Sazzad
• Corporate Creators:
  University of Texas at San Antonio. Department of Civil and Environmental Engineering
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Hydraulic structures
  • Channel stabilization
  • Scour
  • Channels (Waterways)
  • Rivers
  • Geomorphology
  • Field studies
  • Geographic information systems
  • Computer models
• Publication/ Report Number:
  FHWA/TX-13/0-6724-1
• Resource Type:
  Tech Report
• Geographical Coverage:
  Texas
• Corporate Publisher:
  Texas Department of Transportation. Research and Technology Implementation Office
• Abstract:
  Rivers and streams evolve all the time. As a result, no stream channel is absolutely stable. Channels evolve at various speeds both vertically (degradation/aggradation) and horizontally (meander ; migration). They also respond to man-made changes ranging from in-stream modifications (such ; as bridges) to watershed changes (such as land use change and urbanization). Failure to consider ; these dynamics could result in costly repairs and even disastrous collapse. The current practice ; of using HEC-RAS in TxDOT to calculate local scour around hydraulic structures does not fully ; consider the effects of regional channel stabilities. The lengthy Federal Highway Administration ; (FHWA) publications on steam instabilities (e.g., HEC-11, 18, 20, and 23 series) are not consulted ; unless risks are apparent. In addition, there are no clear guidelines on how to address the problem ; in the current TxDOT Hydraulic Design Manual. A comprehensive investigation of the subject ; and synthetic study are needed. This final report is the compilation of all the interim technical ; memorandums submitted to TxDOT during the course of this project.
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• Format:
  PDF
• Funding:
  Project 0-6724
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27748/dot_27748_DS1.pdf
• File Type:
  [PDF - 65.70 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:9e22cf5757fb8edff860cc2e191911574e0a4a42a423f5549f7949d35e6020bd764505142837ec66f48d1b945794a683449fe11910122ec5f80b9f0d80f2cddc