Road & Infrastructure Drainage
Roadway drainage, culvert sizing, channel design, and infrastructure-scale systems.
6 calculators recommended for this problem
Recommended Calculators
These tools are most useful for solving "road & infrastructure drainage" problems.
Manning's Equation for Pipe Flow Calculator
Enter circular pipe diameter, slope, roughness, and flow depth to calculate full- or partial-flow discharge, velocity, and hydraulic properties with Manning's equation.
Open Channel Flow Calculator (Manning's Equation)
Calculate discharge, velocity, hydraulic properties, or normal depth with Manning's equation for rectangular, trapezoidal, triangular, parabolic, and surveyed station/elevation channel shapes.
Culvert Outlet-Control Headwater Calculator
Calculate FHWA HDS-5 outlet-control headwater for circular and box culverts from tailwater, entrance, friction, and exit losses, with outlet velocity plus critical- and normal-depth results; check inlet control separately.
Inlet Interception Calculator
Enter gutter flow and grate, curb-opening, or combination-inlet geometry to calculate HEC-22 interception efficiency, captured flow, and bypass flow.
Gutter Flow Calculator
Enter gutter shape, dimensions, slope, and roughness to calculate flow capacity, velocity, hydraulic radius, and Froude number with Manning's equation.
Riprap Outlet Protection Calculator — Circular Culvert Apron (HEC-14)
Size a riprap apron for a circular culvert with FHWA HEC-14 Equations 10.4 and 10.5, selecting the next adequate riprap class and its apron length, end width, and blanket thickness.
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