FLOOD06421

• County: Statewide
• Basin: Statewide
• Title: Highways in the River Environment
• Date: 2/1/1990
• Prepared By: Federal Highway Administration
• Floodplain - Doc Type: Educational/Technical/Reference Information

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T ABLE OF CONTENTS (Continued)

CHAPTER IV - RIVER MORPHOLOGY AND RIVER RESPONSE (Continued)

4.4 Geometry of Alluvial Channels
4.4.1 Hydraulic Geometry of Alluvial Channels.
4.4.2 Dominant Discharge in Alluvial Rivers
4.4.3 The River Profile and its Bed Material
4.4.4 River Conditions for Meandering and Braiding

4.5 Qualitative Response of River Systems
4.5.1 General River Response to Change
4.5.2 Prediction of Channel Response to Change

4.6 Modeling of River Systems
4.6.1 Physical Modeling
4.6.2 Computer Modeling
4.6.3 Data Needs and State-of-the-Art Assessment

4.7 Highway Problems Related to Gradation Changes
4.7.1 Changes Due to Man's Activities
4.7.2 Natural Causes
4.7.3 Resulting Problems at Highway Crossings

4.8 Stream Stability Problems at Highway Crossings
4.8.1 Bank Stability
4.S.2 Stability Problems Associated
with Channel Relocation
4.8.3 Assessment of Stability for Relocated Streams
4.8.4 Estimation of Future Channel Stability
and Behavior

CHAPTER V - RIVER ST ABILIZA TION. BANK PROTECTION AND SCOUR

5.1 Stream Bank Erosion
5.1.1 Causes of Streambank Failure
5.\.2 Bed and Bank Material
5.1.3 Subsurface Flow
5.1.4 Piping of River Banks
5.1.5 Mass Wasting
5.1.6 River Training and Stabilization

5.2 Riprap Size and Stability Analysis
5.2.1 Stability Factors For Riprap
5.2.2 Simplified Design Aid for Side Slope Riprap
5.2.3 Velocity Method for Riprap Design
5.2.4 Riprap Design on Abutments
5.2.5 Riprap Gradation and Placement
5.2.6 Filters for Riprap
5.2.7 Riprap Failure and Protection

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