Figure Title

  • 30-1A  Symbols for Open Channels

  • 30-3A  Maximum Velocities in Drainage Ditches

  • 30-3B  Lug Intervals

  • 30-4A  Specific Energy and Discharge Diagram for Rectangular Channels

  • 30-4B  Uniform Flow (Values of Manning’s n)

  • 30-4C  Terms in the Energy Equation

  • 30-5A  Hypothetical Cross Section Showing Reaches, Segments and Subsections Used in Assigning n Values

  • 30-5A.1  Switchback

  • 30-5B  Trapezoidal Channel Capacity Chart

  • 30-5C  Nomograph for Normal Depth

  • 30-5D  Profile Convergence Pattern Backwater Computations

  • 30-5E  Profile Study Limits

  • 30-5F  Editable Water Surface Profile Form

  • 30-6A  Sample Roadside Channel

  • 30-6B  Classification of Vegetal Covers as to Degrees of Retardancy

  • 30-6C  Summary of Permissible Shear Stress for Variable Protection Measures

  • 30-6D  Manning’s Roughness Coefficients and Roughness Element Height, ks

  • 30-6E  Manning’s n Versus Relative Roughness for Selected Lining Types (HEC 15)

  • 30-6F  Manning’s n Versus Hydraulic Radius, R, for Class A Vegetation (HEC 15)

  • 30-6G  Manning’s n Versus Hydraulic Radius, R, for Class B Vegetation (HEC 15)

  • 30-6H  Manning’s n Versus Hydraulic Radius, R, for Class C Vegetation (HEC 15)

  • 30-6 I Manning’s n Versus Hydraulic Radius, R, for Class D Vegetation (HEC 15)

  • 30-6J  Manning’s n Versus Hydraulic Radius, R, for Class E Vegetation (HEC 15)

  • 30-7A  Geomorphic Factors That Affect Stream Stability

  • 30-7B  Channel Classification and Relative Stability as Hydraulic Factors Are Varied

  • 30-7C  Sinuosity Versus Slope with Constant Discharge

  • 30-7D  Slope-Discharge for Braiding or Meandering Bed Streams

  • 30-8.1  Site Data For Example 30-8.1

  • 30-8.2  Stream Cross Section “A” For Example 30-8.1

  • 30-8A  Channel Computation Form

  • 30-8B  Example Stage-Discharge Curve

  • 30-8C  WSPRO Input Data File

  • 30-8D  WSPRO Results

  • 30-8E  Water Surface Profiles for Q - 283.13 m³/s and Variable Tailwater (TW) Elevations

  • 30-8F  Design of Straight-Wall Contractions in Supercritical Flow Example 30-8.6

  • 30-8G  Contraction Ratio τ and Depth Ratio y3/y1 for Supercritical Flow in Contraction of Angle θ

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