Water::Canopy Class Reference

Canopy handles the the throughfall and evaporation from the forest canopy. More...

#include <watercycle.h>

Public Member Functions
void	setup ()
	setup and load parameter values More...
void	setStandParameters (const double LAIneedle, const double LAIbroadleave, const double maxCanopyConductance)
double	flow (const double &preciptitation_mm)
	process the canopy layer. returns the amount of precipitation that leaves the canopy-layer. More...
double	evapotranspirationBGC (const ClimateDay *climate, const double daylength_h)
	evapotranspiration from soil More...
double	evapotranspiration3PG (const ClimateDay *climate, const double daylength_h, const double combined_response)
	evapotranspiration from soil (mm). returns More...
double	interception () const
	mm water that is intercepted by the crown More...
double	evaporationCanopy () const
	evaporation from canopy (mm) More...
double	avgMaxCanopyConductance () const
	averaged maximum canopy conductance of current species distribution (m/s) More...
const double *	referenceEvapotranspiration () const
	monthly reference ET (see Adair et al 2008) More...

Friends
class	::WaterCycle

Detailed Description

Canopy handles the the throughfall and evaporation from the forest canopy.

The Canopy class encapsulates the leaves of trees with regard to water related processes. These processes are the interception of precipitation, the evaporation from the canopy, and, most important, the transpiration of the canopy. The functions are called by WaterCycle.

Member Function Documentation

avgMaxCanopyConductance()

double Water::Canopy::avgMaxCanopyConductance ( ) const

inline

averaged maximum canopy conductance of current species distribution (m/s)

evaporationCanopy()

double Water::Canopy::evaporationCanopy ( ) const

inline

evaporation from canopy (mm)

evapotranspiration3PG()

double Water::Canopy::evapotranspiration3PG	(	const ClimateDay *	climate,
		const double	daylength_h,
		const double	combined_response
	)

evapotranspiration from soil (mm). returns

calculate the daily evaporation/transpiration using the Penman-Monteith-Equation.

This version is based on 3PG. See the Visual Basic Code in 3PGjs.xls. Returns the total sum of evaporation+transpiration in mm of the day.

evapotranspirationBGC()

double Water::Canopy::evapotranspirationBGC	(	const ClimateDay *	climate,
		const double	daylength_h
	)

evapotranspiration from soil

flow()

double Water::Canopy::flow

(

const double &

preciptitation_mm

)

process the canopy layer. returns the amount of precipitation that leaves the canopy-layer.

Interception in crown canopy.

Calculates the amount of preciptitation that does not reach the ground and is stored in the canopy. The approach is adopted from Picus 1.3. Returns the amount of precipitation (mm) that surpasses the canopy layer.

See also

http://iland-model.org/water+cycle#precipitation_and_interception

interception()

double Water::Canopy::interception ( ) const

inline

mm water that is intercepted by the crown

referenceEvapotranspiration()

const double * Water::Canopy::referenceEvapotranspiration ( ) const

inline

monthly reference ET (see Adair et al 2008)

setStandParameters()

void Water::Canopy::setStandParameters	(	const double	LAIneedle,
		const double	LAIbroadleave,
		const double	maxCanopyConductance
	)

setup()

void Water::Canopy::setup

(

)

setup and load parameter values

sets up the canopy. fetch some global parameter values...

Friends And Related Function Documentation

::WaterCycle

friend class ::WaterCycle

friend

---

The documentation for this class was generated from the following files:

• C:/dev/iland/src/core/watercycle.h
• C:/dev/iland/src/core/watercycle.cpp