ld_droughtstress.h

 
#ifndef  LD_DROUGHTSTRESS_H_
#define  LD_DROUGHTSTRESS_H_
 
#include  "ld_modelsconfig.h"
#include  "state/mbe_state.h"
#include  <model/tinymodelcoll.h>
 
struct LDNDC_API DroughtStress : public cbm::TinyModelCollection< DroughtStress, double, double >
{
    DroughtStress( char const * = 0 /*kind*/);
 
    /* evaluate for given "water stress factor" (WS) */
    double  evaluate( double /*WS*/,
                char const * = 0 /*kind*/) const;

    double  exponential( double /*WS*/) const;

    double  linear_threshold( double /*WS*/) const; /*linear*/

    static double  linear_threshold( double /*WS*/, double /*fh2o_ref*/);

    double  linear( double /*WS*/) const; /*linear*/
 
    /* relative available soil water content at which stomata start to close */
    double  fh2o_ref;
    
    /* slope of foliage conductivity in response to relative available soil water content */
    double  gs_slope;
 
    private:
        typedef EvaluateFunction DroughtStressFunction;
        DroughtStressFunction  evaluate_function( char const * = 0 /*kind*/) const;
};
 
 
namespace ldndc {

double
non_stomatal_water_limitation(
                              double const & _var,
                              double const & _var_ref,
                              double const & _var_scale);
 
} /* namespace ldndc */
 
#endif  /*  !LD_DROUGHTSTRESS_H_  */