Culvert.hpp File Reference

Culvert inlet control — FHWA HEC-5 equations. More...

#include <vector>

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Classes
struct	openswmm::culvert::CulvertCoeffs
	Culvert curve coefficients (K, M, C, Y) per type code. More...

Namespaces
namespace	openswmm
namespace	openswmm::culvert

Functions
CulvertCoeffs	openswmm::culvert::getCoeffs (int culvert_code)
	Get coefficients for a culvert type code (1-57).
double	openswmm::culvert::getInflow (double q_proposed, double head, double y_full, double a_full, double slope, int code, double &dqdh)
	Compute culvert inlet-controlled inflow.
void	openswmm::culvert::batchComputeInletControl (const int *link_indices, int n, SimulationContext &ctx)
	Batch compute culvert inlet control for all culvert links.

Detailed Description

Culvert inlet control — FHWA HEC-5 equations.

Three flow regimes:

• Unsubmerged (y <= 0.95*yFull): Q = AD * (h/yFull/K)^(1/M)
• Transition: linear interpolation
• Submerged (y >= y2): Q = AD * sqrt((h/yFull - Y + scf) / C)

Batch: classify all culverts by regime, compute flow per regime group.

Note

Legacy reference: src/legacy/engine/culvert.c

Author

Caleb Buahin caleb.nosp@m..bua.nosp@m.hin@g.nosp@m.mail.nosp@m..com

Copyright

Copyright (c) 2026 HydroCouple. All rights reserved.

License\n MIT License