Revised Clear-Water and Live-Bed Contraction Scour Analysis (2021)

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A-1   Abbreviations and Acronyms ADV Acoustic Doppler Velocimetry CDOT Colorado Department of Transportation CFD Computational fluid dynamics CSU Colorado State University CV Coefficient of variation CW Clear water FAVOR Fractional Area-Volume Obstacle Representation GVF Gradually varied flow HEC-RAS Hydraulic Engineering Center-River Analysis System HEC-18 Hydraulic Engineering Circular No. 18 IACET International Association of Continuing Education and Training IAHR International Association for Hydro-Environment Engineering and Research ISD Instructional Systems Design LB Live bed LiDAR Light detection and ranging LRFD Load and Resistance Factor Design LSPIV Large-scale particle velocimetry NBI National Bridge Inventory NBSD National Bridge Scour Database NHI National Highway Institute RB Rigid bed RMS Root mean square RVF Rapidly varied flow SHR-2D Sedimentation and River Hydraulics-2D SMS Surface-water Modeling System UF Uniform flow VOF Volume of Fluid WS Water surface WSE or WSEL Water surface elevation

Abbreviations and acronyms used without denitions in TRB publications: A4A Airlines for America AAAE American Association of Airport Executives AASHO American Association of State Highway Officials AASHTO American Association of State Highway and Transportation Officials ACI–NA Airports Council International–North America ACRP Airport Cooperative Research Program ADA Americans with Disabilities Act APTA American Public Transportation Association ASCE American Society of Civil Engineers ASME American Society of Mechanical Engineers ASTM American Society for Testing and Materials ATA American Trucking Associations CTAA Community Transportation Association of America CTBSSP Commercial Truck and Bus Safety Synthesis Program DHS Department of Homeland Security DOE Department of Energy EPA Environmental Protection Agency FAA Federal Aviation Administration FAST Fixing America’s Surface Transportation Act (2015) FHWA Federal Highway Administration FMCSA Federal Motor Carrier Safety Administration FRA Federal Railroad Administration FTA Federal Transit Administration HMCRP Hazardous Materials Cooperative Research Program IEEE Institute of Electrical and Electronics Engineers ISTEA Intermodal Surface Transportation Efficiency Act of 1991 ITE Institute of Transportation Engineers MAP-21 Moving Ahead for Progress in the 21st Century Act (2012) NASA National Aeronautics and Space Administration NASAO National Association of State Aviation Officials NCFRP National Cooperative Freight Research Program NCHRP National Cooperative Highway Research Program NHTSA National Highway Traffic Safety Administration NTSB National Transportation Safety Board PHMSA Pipeline and Hazardous Materials Safety Administration RITA Research and Innovative Technology Administration SAE Society of Automotive Engineers SAFETEA-LU Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users (2005) TCRP Transit Cooperative Research Program TDC Transit Development Corporation TEA-21 Transportation Equity Act for the 21st Century (1998) TRB Transportation Research Board TSA Transportation Security Administration U.S. DOT United States Department of Transportation

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