TempIndexSnowMelt Class Reference

Calculates snow melt using a simple degree day method. More...

Inheritance diagram for TempIndexSnowMelt:

Collaboration diagram for TempIndexSnowMelt:

Detailed Description

Calculates snow melt using a simple degree day method.

\[ q_{melt} [mm/day] = (T-T_{thres}) * r \]

Usage:

# Create a new snow water storage
snow = cell.add_storage('Snow','S')
# Split Rainfall and snow fall according to the current temperature
snowfall = cmf.Snowfall(snow,cell)
# Create a snowfall connection between snow and surfacewater)
snowmelt = cmf.SimpleTindexSnowMelt(snow,cell.surfacewater,cell,rate=7.0)

Public Member Functions
	TempIndexSnowMelt (cmf::water::WaterStorage::ptr snow, cmf::water::flux_node::ptr surface_water, cmf::upslope::Cell &cell, real rate=7.0)
	Creates a new snow melt connection.
real	conc (cmf::math::Time t, const cmf::water::solute &_Solute)
	Returns the concentration of the flux.
flux_node::ptr	get_target (const flux_node &inquirer)
	Returns the other end of a connection than the asking end.
flux_node::ptr	get_target (int index) const
	With index 0, the left node is returned, with index 1 the right node of the connection.
real	get_tracer_filter ()
	A value ranging from 0 to 1 to filter tracers out of the water flux.
real	get_tracer_filter (solute S)
	A value ranging from 0 to 1 to filter tracers out of the water flux.
bool	kill_me ()
	Deregisters this connection from its nodes. Returns true if only one reference is left.
flux_node::ptr	left_node () const
	Returns the left node of this connection.
real	q (const flux_node &inquirer, cmf::math::Time t)
	Returns the current flux through a connection. Negative signs mean out of the inquirer, positive are inflows to the inquirer.
void	refresh (cmf::math::Time t)
	Performes a new calculation of the flux.
flux_node::ptr	right_node () const
	returns the right node of this connection
void	set_tracer_filter (real value)
	A value ranging from 0 to 1 to filter tracers out of the water flux.

Static Public Member Functions
static void	use_for_cell (cmf::upslope::Cell &cell)
	Creates the connection between snow and surface water.

Public Attributes
real	SnowMeltRate
	Rate of snow melt in mm/(degC day), default = 7.0.
const std::string	type
	A string describing the type of the connection.

Constructor & Destructor Documentation

TempIndexSnowMelt()

TempIndexSnowMelt	(	cmf::water::WaterStorage::ptr	snow,
		cmf::water::flux_node::ptr	surface_water,
		cmf::upslope::Cell &	cell,
		real	rate = 7.0 )

Creates a new snow melt connection.

Parameters

snow	Snow storage, usually cel.snow
surface_water	target of the melted water (usually cell.surfacewater)
cell	The cell, needed to get weather and area
rate	The rate of snow melt, given in mm/(degC day), default = 7.0

Member Function Documentation

conc()

real conc ( cmf::math::Time t, const cmf::water::solute & _Solute )

inherited

Returns the concentration of the flux.

If not overridden, it returns the concentration of the source of the flux (direction depending)

get_tracer_filter()

real get_tracer_filter ( )

inherited

A value ranging from 0 to 1 to filter tracers out of the water flux.

1.0 is no filter and 0.0 means no solute is crossing this connection

set_tracer_filter()

void set_tracer_filter ( real value )

inherited

A value ranging from 0 to 1 to filter tracers out of the water flux.

1.0 is no filter and 0.0 means no solute is crossing this connection

use_for_cell()

static void use_for_cell ( cmf::upslope::Cell & cell )

static

Creates the connection between snow and surface water.

If no snow storage exists, it is created and precipitation is split up in Snow and Rain.