Subversion Repositories public iLand

#ifndef SPECIES_H

#define SPECIES_H

#include "expression.h"

#include "speciesset.h"

class StampContainer; // forwards

class Stamp;

class Species

{

public:

    Species(SpeciesSet *set) { mSet = set; mIndex=set->count(); }

    // properties

    /// @property id 4-character unique identification of the tree species

    const QString &id() const { return mId; }

    /// the full name (e.g. Picea Abies) of the species

    const QString &name() const { return mName; }

    int index() const { return mIndex; } ///< unique index of species within current set

    bool active() const { return true; } ///< active??? todo!

    // calculations: allometries

    double biomassFoliage(const double dbh) const;

    double biomassWoody(const double dbh) const;

    double biomassRoot(const double dbh) const;

    double allometricRatio_wf() const { return mWoody_b / mFoliage_b; }

    double allometricFractionStem(const double dbh) const;

    // turnover rates

    double turnoverLeaf() const { return mTurnoverLeaf; }

    double turnoverRoot() const { return mTurnoverRoot; }

    // hd-values

    void hdRange(const double dbh, double &rMinHD, double &rMaxHD);

    // growth

    double volumeFactor() const { return mVolumeFactor; } ///< factor for volume calculation: V = factor * D^2*H (incorporates density and the form of the bole)

    double density() const { return mWoodDensity; } ///< density of stem wood [kg/m3]

    double specificLeafArea() const { return mSpecificLeafArea; }

    // mortality

    double deathProb_intrinsic() const { return mDeathProb_intrinsic; }

    double deathProb_stress() const { return mDeathProb_stress; }

    // aging

    double aging(const float height, const int age);

    // environmental responses

    double vpdResponse(const double &vpd) const;

    double temperatureResponse(const double &delayed_temp) const;

    double nitrogenResponse(const double &availableNitrogen) const { return mSet->nitrogenResponse(availableNitrogen, mRespNitrogenClass); }

    const Stamp* stamp(const float dbh, const float height) const { return mLIPs.stamp(dbh, height);}

    // maintenance

    void setup();

private:

    Q_DISABLE_COPY(Species);

    // helpers during setup

    double doubleVar(const QString s) { return mSet->var(s).toDouble(); }///< during setup: get value of variable @p s as a double.

    double intVar(const QString s) { return mSet->var(s).toInt(); } ///< during setup: get value of variable @p s as an integer.

    QString stringVar(const QString s) { return mSet->var(s).toString(); } ///< during setup: get value of variable @p s as a string.

    SpeciesSet *mSet; ///< ptr. to the "parent" set

    StampContainer mLIPs; ///< ptr to the container of the LIP-pattern

    QString mId;

    QString mName;

    int mIndex; ///< internal index within the SpeciesSet

    // biomass allometries:

    double mFoliage_a, mFoliage_b;  ///< allometry (biomass = a * dbh^b) for foliage

    double mWoody_a, mWoody_b; ///< allometry (biomass = a * dbh^b) for woody compartments aboveground

    double mRoot_a, mRoot_b; ///< allometry (biomass = a * dbh^b) for roots (compound, fine and coarse roots as one pool)

    double mBranch_a, mBranch_b; ///< allometry (biomass = a * dbh^b) for branches

    double mSpecificLeafArea; ///< conversion factor from kg OTS to m2 LeafArea

    // turnover rates

    double mTurnoverLeaf; ///< yearly turnover rate leafs

    double mTurnoverRoot; ///< yearly turnover rate root

    // height-diameter-relationships

    Expression mHDlow; ///< minimum HD-relation as f(d) (open grown tree)

    Expression mHDhigh; ///< maximum HD-relation as f(d)

    // stem density and taper

    double mWoodDensity; ///< density of the wood [kg/m3]

    double mFormFactor; ///< taper form factor of the stem [-] used for volume / stem-mass calculation calculation

    double mVolumeFactor; ///< factor for volume calculation

    // mortality

    double mDeathProb_intrinsic;  ///< prob. of intrinsic death per year [0..1]

    double mDeathProb_stress; ///< max. prob. of death per year when tree suffering maximum stress

    // Aging

    double mMaximumAge; ///< maximum age of species (years)

    double mMaximumHeight; ///< maximum height of species (m) for aging

    // environmental responses

    double mRespVpdExponent; ///< exponent in vpd response calculation (Mäkela 2008)

    double mRespTempMin; ///< temperature response calculation offset

    double mRespTempMax; ///< temperature response calculation: saturation point for temp. response

    double mRespNitrogenClass; ///< nitrogen response class (1..3). fractional values (e.g. 1.2) are interpolated.

    Expression mAging;

};

// inlined functions...

inline void Species::hdRange(const double dbh, double &rLowHD, double &rHighHD)

{

    rLowHD = mHDlow.calculate(dbh);

    rHighHD = mHDhigh.calculate(dbh);

}

/** vpdResponse calculates response on vpd.

    Input: vpd [kPa]*/

inline double Species::vpdResponse(const double &vpd) const

{

    return exp(mRespVpdExponent * vpd);

}

/** temperatureResponse calculates response on delayed daily temperature.

    Input: average temperature [°C]

    Note: slightly different from Mäkela 2008: the maximum parameter (Sk) in iLand is interpreted as the absolute

          temperature yielding a response of 1; in Mäkela 2008, Sk is the width of the range (relative to the lower threhold)

*/

inline double Species::temperatureResponse(const double &delayed_temp) const

{

    double x = qMax(delayed_temp-mRespTempMin, 0.);

    x = qMin(x/(mRespTempMax-mRespTempMin), 1.);

    return x;

}

#endif // SPECIES_H