Infiltration.hpp File Reference

Infiltration models — Horton, Green-Ampt, SCS Curve Number. More...

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Classes
struct	openswmm::HortonState
struct	openswmm::GreenAmptState
struct	openswmm::CurveNumState

Namespaces
namespace	openswmm
namespace	openswmm::infil

Enumerations
enum class	openswmm::InfilModel : int {   openswmm::HORTON = 0 ,   openswmm::MOD_HORTON = 1 ,   openswmm::GREEN_AMPT = 2 ,   openswmm::CURVE_NUM = 3 }

Functions
double	openswmm::infil::horton_getInfil (HortonState &state, double precip, double depth, double dt)
	Compute Horton infiltration rate for one timestep.
double	openswmm::infil::modHorton_getInfil (HortonState &state, double precip, double depth, double dt)
	Compute Modified Horton infiltration rate for one timestep.
double	openswmm::infil::grnampt_getInfil (GreenAmptState &state, double precip, double depth, double dt)
	Compute Green-Ampt infiltration rate.
double	openswmm::infil::curvenum_getInfil (CurveNumState &state, double precip, double depth, double dt)
	Compute SCS Curve Number infiltration rate.
void	openswmm::infil::horton_init (HortonState &state, double f0, double fmin, double decay, double regen, double Fmax, const SimulationOptions &opts)
	Initialise Horton parameters from user input.
void	openswmm::infil::grnampt_init (GreenAmptState &state, double S, double Ks, double IMD, const SimulationOptions &opts)
	Initialise Green-Ampt parameters.
void	openswmm::infil::curvenum_init (CurveNumState &state, double CN, double regen)
	Initialise Curve Number parameters.

Detailed Description

Infiltration models — Horton, Green-Ampt, SCS Curve Number.

All three models are implemented with exact numerical parity to legacy infil.c. Each model maintains per-subcatchment state and computes infiltration rate given current precipitation, ponded depth, and timestep.

Note

Legacy reference: src/legacy/engine/infil.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