pyhelios.PlantHydraulics.HydraulicCapacitance Class Reference

Hydraulic capacitance of a leaf, stem or root, from pressure-volume curve parameters. More...

Detailed Description

Hydraulic capacitance of a leaf, stem or root, from pressure-volume curve parameters.

A fixed_constant_capacitance greater than zero gives a constant capacitance. Use HydraulicCapacitance.constant() to build one; its pressure-volume curve parameters are the defaults.

For a leaf, the model always computes relative water content, turgor pressure and osmotic potential from the pressure-volume curve parameters, so a constant leaf capacitance means those outputs come from the default curve. For a stem or root, capacitance is used only by non-steady-state runs, which require a constant; their pressure-volume curve parameters are never used.

Definition at line 139 of file PlantHydraulics.py.

Public Member Functions
'HydraulicCapacitance'	constant (cls, float capacitance)
	Create a constant hydraulic capacitance.
bool	is_constant (self)
	True if this is a constant capacitance rather than a pressure-volume curve.
None	validate (self, str method_name="HydraulicCapacitance")
	Raise ValueError if any parameter is outside its valid range.
List[float]	to_list (self)
	Flat layout expected by the native interface.

Static Public Attributes
float	osmotic_potential_at_full_turgor = -2.0
	Osmotic potential at full turgor (MPa).
float	relative_water_content_at_turgor_loss = 0.8
	Relative water content at the turgor loss point (unitless), in (0, 1).
float	cell_wall_elasticity_exponent = 1.0
	Exponent of the turgor pressure versus relative water content relationship (unitless).
float	saturated_specific_water_content = 1.0
	Specific water content at a relative water content of 1 (mol/m²).
float	fixed_constant_capacitance = -1.0
	Constant capacitance (mol/m²/MPa), or -1 to use the pressure-volume curve.

Member Function Documentation

constant()

'HydraulicCapacitance' pyhelios.PlantHydraulics.HydraulicCapacitance.constant	(		cls,
		float	capacitance )

Create a constant hydraulic capacitance.

Parameters

capacitance

Constant capacitance (mol/m²/MPa). Must be > 0.

Definition at line 168 of file PlantHydraulics.py.

is_constant()

bool pyhelios.PlantHydraulics.HydraulicCapacitance.is_constant

(

self

)

True if this is a constant capacitance rather than a pressure-volume curve.

Definition at line 175 of file PlantHydraulics.py.

to_list()

List[float] pyhelios.PlantHydraulics.HydraulicCapacitance.to_list

(

self

)

Flat layout expected by the native interface.

Definition at line 204 of file PlantHydraulics.py.

validate()

None pyhelios.PlantHydraulics.HydraulicCapacitance.validate	(		self,
		str	method_name = "HydraulicCapacitance" )

Raise ValueError if any parameter is outside its valid range.

Definition at line 179 of file PlantHydraulics.py.

Member Data Documentation

cell_wall_elasticity_exponent

pyhelios.PlantHydraulics.HydraulicCapacitance.cell_wall_elasticity_exponent = 1.0

static

Exponent of the turgor pressure versus relative water content relationship (unitless).

Definition at line 157 of file PlantHydraulics.py.

fixed_constant_capacitance

pyhelios.PlantHydraulics.HydraulicCapacitance.fixed_constant_capacitance = -1.0

static

Constant capacitance (mol/m²/MPa), or -1 to use the pressure-volume curve.

Definition at line 159 of file PlantHydraulics.py.

osmotic_potential_at_full_turgor

pyhelios.PlantHydraulics.HydraulicCapacitance.osmotic_potential_at_full_turgor = -2.0

static

Osmotic potential at full turgor (MPa).

Must be < 0.

Definition at line 155 of file PlantHydraulics.py.

relative_water_content_at_turgor_loss

pyhelios.PlantHydraulics.HydraulicCapacitance.relative_water_content_at_turgor_loss = 0.8

static

Relative water content at the turgor loss point (unitless), in (0, 1).

Definition at line 156 of file PlantHydraulics.py.

saturated_specific_water_content

pyhelios.PlantHydraulics.HydraulicCapacitance.saturated_specific_water_content = 1.0

static

Specific water content at a relative water content of 1 (mol/m²).

Definition at line 158 of file PlantHydraulics.py.

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

• pyhelios/PlantHydraulics.py