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01 · Project setup

Start with defensible outlet data.

HY-8 discharge, depth and velocity remain authoritative. The app checks continuity before passing energy downstream.

Project identity

Report information

Project nameChainage / asset IDProject codeDocument codeRevisionIssue datePrepared byChecked byApproved bySubmitted toReport titleDivisionRevision descriptionIssue purpose

HY-8 / global

Hydraulic boundary conditions

Design discharge Qm³/sOutlet depth yomOutlet velocity Vom/sTailwater depthmProtection width BpmPhysical plan width; not automatically used as jet width.Hydraulic flow width BhoptionalmBlank = Q/(yV) = 4.47 mAllowable exit velocitym/sOutlet invert / datummVelocity-head coefficient αKinematic viscosity νm²/sHEC-15 default at 15.5°C: 1.131×10⁻⁶ m²/s.

Derived jet width4.47 m

Initial specific energy1.029 m

Outlet Froude1.27

Continuity mismatch0.0%

Geometry & detailing

Culvert outlet

Culvert typeCells / barrelsClear width / cellmClear height / cellm

Continuous side cut-off walls · 2 No.

Width bscmDepth DscmMaterial