Calculates a flux from a soil layer using TOPMODELs (Beven & Kirkby 1979) exponential transmissivity concept. More...

Inheritance diagram for TOPModelFlow:

Collaboration diagram for TOPModelFlow:

Detailed Description

Calculates a flux from a soil layer using TOPMODELs (Beven & Kirkby 1979) exponential transmissivity concept.

\[ T = T_0 \exp(-D_i/m) \]

where:

\(T\) is the actual transmissivity of the profile in \(m^2/day\)
\(T0\) is the transmissivity of the profile at saturation
\(D_i\) is the drained depth in m, calculated as \((C-V)/A\), the capacity of the layer - volume per area
\(m\) a scaling factor in m

By using the transmissivity in Darcy's law and assuming the GW gradient to be parallel to the topographic slope we get for the flow:

\[ q = T_0 \exp(-D_i/m) w s\]

where:

Note: TOPMODEL is based on the concept of drained depth, not, as cmf on the concept of stored volume. Hence, negative volumes can occur if

Public Member Functions
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.

Public Attributes
const std::string	type
	A string describing the type of the connection.

Member Function Documentation

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)

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

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