mo_canopy_interc Module Reference

Canopy interception. More...

Functions/Subroutines
elemental pure subroutine, public	canopy_interc (pet, interc_max, precip, interc, throughfall, evap_canopy)
	Canopy interception.

Detailed Description

Canopy interception.

This module deals with processes related to canopy interception, evaporation and throughfall.

Changelog

• RK Sep 2013
  • Documentation updated (formula and a short description added)

Authors

Vladyslav Prykhodko

Date

Dec 2012

Copyright

Copyright 2005-2024, the mHM Developers, Luis Samaniego, Sabine Attinger: All rights reserved. mHM is released under the LGPLv3+ license

The UFZ(CHS) mesoscale hydrologic model mHM is free software. You can redistribute it and/or modify it under the terms of the GNU General Public License as published by the free Software Foundation either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You received a copy of the GNU Lesser General Public License along with the UFZ CHS mesoscale hydrologic model mHM. It can be found in the files COPYING and COPYING.LESSER provided with this software. The complete GNU license text can also be found at http://www.gnu.org/licenses/.

Function/Subroutine Documentation

canopy_interc()

elemental pure subroutine, public mo_canopy_interc::canopy_interc	(	real(dp), intent(in)	pet,
		real(dp), intent(in)	interc_max,
		real(dp), intent(in)	precip,
		real(dp), intent(inout)	interc,
		real(dp), intent(out)	throughfall,
		real(dp), intent(out)	evap_canopy
	)

Canopy interception.

Calculates throughfall. Updates interception and evaporation intensity from canopy. Throughfall ( \(F\)) is estimated as a function of the incoming precipitation ( \(P\)), the current status of the canopy water content ( \(C\)), and the max. water

\[ F = Max( (P + C - C_{max}), 0) \]

Evaporation ( \(E\)) from canopy is estimated as a fraction of the potential evapotranspiration( \(E_{p}\)) depending on the current status of the canopy water content ( \(C\)) and the max. water content( \(C_{max}\)) that can be intecepted by the vegetation.

\[ E = E_{p}(C/C_{max})^{2/3} \]

ADDITIONAL INFORMATION content( \(C_{max}\)) that can be intecepted by the vegetation. canopy_interc(pet, interc_month_max, interc_max, precip, throughfall, evap_canopy, interc)

Parameters

[in]	REAL(dp) :: pet	Potential evapotranspiration [mm TS-1]
[in]	REAL(dp) :: interc_max	Maximum interception [mm]
[in]	REAL(dp) :: precip	Daily mean precipitation [mm]
[in,out]	REAL(dp) :: interc	Interception [mm]
[out]	REAL(dp) :: throughfall	Throughfall [mm TS-1]
[out]	REAL(dp) :: evap_canopy	Real evaporation intensity from canopy[mm TS-1]

Authors

Vladyslav Prykhodko

Date

Dec 2012

Definition at line 75 of file mo_canopy_interc.f90.

References mo_common_constants::eps_dp.

Referenced by mo_mhm::mhm().

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