Hydrology

7.

Hydrologic Design and Engineering Applications

7.1.

Design Philosophy and Concepts

7.1.1.

Design Standards

7.1.2.

7.1.3.

7.1.4.

Economic Considerations

7.1.5.

Environmental Considerations

7.2.

Design Storms and Design Floods

7.2.1.

Design Event Selection

7.2.1.1.

Return Period Selection

7.2.1.2.

Risk-Based Design

7.2.2.

Design Storm Development

7.2.2.1.

Synthetic Storm Distributions

7.2.2.2.

Temporal Patterns

7.2.2.3.

Spatial Patterns

7.2.3.

Probable Maximum Precipitation

7.2.3.1.

Meteorological Methods

7.2.3.2.

Statistical Methods

7.2.4.

Probable Maximum Flood

7.2.4.1.

7.2.4.2.

Dam Safety Applications

7.3.

Rational Method

7.3.1.

Method Assumptions

7.3.2.

Runoff Coefficient Selection

7.3.3.

Time of Concentration

7.3.3.1.

Overland Flow Time

7.3.3.2.

Channel Flow Time

7.3.4.

Rainfall Intensity

7.3.5.

Method Limitations

7.3.6.

Modified Rational Method

7.4.

NRCS Curve Number Method

7.4.1.

Curve Number Concept

7.4.2.

Curve Number Selection

7.4.2.1.

Hydrologic Soil Groups

7.4.2.2.

Land Use Classification

7.4.2.3.

Antecedent Moisture Conditions

7.4.3.

Runoff Estimation

7.4.4.

Time of Concentration

7.4.5.

Peak Discharge Estimation

7.4.6.

Method Limitations

7.5.

Unit Hydrograph Methods

7.5.1.

Synthetic Unit Hydrographs

7.5.2.

Design Applications

7.5.3.

7.6.

Hydraulic Structure Design

7.6.1.

7.6.1.1.

7.6.1.2.

Hydraulic Design

7.6.1.3.

7.6.1.4.

7.6.1.5.

Energy Dissipation

7.6.2.

Bridge Waterway Design

7.6.2.1.

Hydraulic Analysis

7.6.2.2.

7.6.2.3.

Freeboard Requirements

7.6.3.

7.6.3.1.

Stable Channel Design

7.6.3.2.

Lined Channel Design

7.6.3.3.

Energy Dissipation Structures

7.6.4.

Stormwater Management Facilities

7.6.4.1.

Detention Basins

7.6.4.1.1.

Design Criteria

7.6.4.1.2.

Outlet Structures

7.6.4.1.3.

Emergency Spillways

7.6.4.2.

Retention Basins

7.6.4.3.

Infiltration Facilities

7.6.5.

7.6.5.1.

Design Criteria

7.6.5.2.

Seepage Analysis

7.6.5.3.

Stability Analysis

7.6.5.4.

Freeboard Requirements

7.7.

Dam Engineering Hydrology

7.7.1.

Spillway Design

7.7.1.1.

Design Flood Selection

7.7.1.2.

7.7.1.3.

Hydraulic Design

7.7.2.

Reservoir Routing

7.7.2.1.

Inflow Design Hydrograph

7.7.2.2.

Storage-Outflow Relationships

7.7.2.3.

Routing Procedures

7.7.3.

7.7.3.1.

Hazard Classification

7.7.3.2.

Inflow Design Flood

7.7.3.3.

Emergency Action Plans

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