Critical Depth of Open-Channel Flow
Before finalizing a channel design, the hydraulic designer must verify that the normal depth of a channel is either greater […]
Hydraulics
Various types of drainage facilities are required to protect the highway against surface and subsurface water. Drainage facilities must be designed to convey the water across, along, or away from the highway in the most economical, efficient, and safe manner without damaging the highway or adjacent property. The purpose of this manual is to provide detailed information on the subjects of hydrologic and hydraulic analysis related to highway design. This manual should be used in conjunction with the Washington State Department of Transportation (WSDOT) Highway Runoff Manual and the WSDOT Design Manual, specifically Section 1210.
Roadside Ditch Design Criteria
Roadside ditches are generally located alongside uncurbed roadways with the primary purpose of conveying runoff away from the roadway. Ditches
Field Slope Measurements
The slope is calculated by dividing the vertical drop in the river channel by the horizontal distance measured along the
Uniform Flow Calculations
The determination of the flow characteristics for uniform flow conditions can be calculated based on the continuity equation (Equation 4-1).
Introduction to Open-Channel Flow
An open channel is a watercourse that allows part of the flow to be exposed to the atmosphere. This includes
Miscellaneous Design Considerations: Siphons Culvert Design
Siphon designs require review and concurrence by the State Hydraulics Office per Table 1-1. Also, the siphon design may need
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Upstream Ponding Culvert Design
The culvert design methodology presented in Section 3-3 assumes that the headwater required to pass a given flow through a
Horizontal and Vertical Angle Points Culvert Design
The slope of a culvert shall remain constant throughout the entire length of the culvert. This is generally easy to
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Camber Culvert Design
When a culvert is installed under moderate to high fills 30 to 60 feet or higher, greater settlement of the