gr4j Namespace Reference

Functions
double	Infiltration (double S, double Pn, double X1)
double	Evaporation (double S, double En, double X1)
double	Percolation (double S, double X1)

Variables
constexpr double	kTanhCap = 13.0
constexpr double	kPercDenom = 25.62890625

Detailed Description

Shared GR4J production-store equations (Perrin et al., 2003).

These are deterministic functions of the production store level S at the start of the time step, the net forcing (Pn or En) and the capacity X1. They are used by the discrete production process and the ET process so that both compute identical, solver-independent values within a time step.

Function Documentation

Evaporation()

double gr4j::Evaporation ( double S, double En, double X1 )

inline

Actual evapotranspiration drawn from the production store given the net evaporative demand En.

Infiltration()

double gr4j::Infiltration ( double S, double Pn, double X1 )

inline

Infiltration into the production store: the fraction of net precipitation Pn that fills the store.

Percolation()

double gr4j::Percolation ( double S, double X1 )

inline

Percolation leaving the production store.