mo_runoff Module Reference

Runoff generation. More...

Functions/Subroutines
subroutine, public	runoff_unsat_zone (k1, kp, k0, alpha, karst_loss, pefec_soil, unsat_thresh, sat_storage, unsat_storage, slow_interflow, fast_interflow, perc)
	Runoff generation for the saturated zone.
subroutine, public	runoff_sat_zone (k2, sat_storage, baseflow)
	Runoff generation for the saturated zone.
subroutine, public	l1_total_runoff (fsealed_area_fraction, fast_interflow, slow_interflow, baseflow, direct_runoff, total_runoff)
	total runoff accumulation at level 1

Detailed Description

Runoff generation.

This module generates the runoff for the unsaturated and saturated zones and provides runoff accumulation.

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

l1_total_runoff()

subroutine, public mo_runoff::l1_total_runoff	(	real(dp), intent(in)	fsealed_area_fraction,
		real(dp), intent(in)	fast_interflow,
		real(dp), intent(in)	slow_interflow,
		real(dp), intent(in)	baseflow,
		real(dp), intent(in)	direct_runoff,
		real(dp), intent(out)	total_runoff
	)

total runoff accumulation at level 1

Accumulates runoff.

\[ q_{T} = ( q_0 + q_1 + q_2 ) * (1-fSealed) + q_{D} * fSealed \]

, where fSealed is the fraction of sealed area.

Parameters

[in]	REAL(dp) :: fSealed_area_fraction	sealed area fraction [1]
[in]	REAL(dp) :: fast_interflow	\( q_0 \) Fast runoff component [mm TS-1]
[in]	REAL(dp) :: slow_interflow	\( q_1 \) Slow runoff component [mm TS-1]
[in]	REAL(dp) :: baseflow	\( q_2 \) Baseflow [mm TS-1]
[in]	REAL(dp) :: direct_runoff	\( q_D \) Direct runoff from impervious areas [mm TS-1]
[out]	REAL(dp) :: total_runoff	\( q_T \) Generated runoff [mm TS-1]

Authors

Vladyslav Prykhodko

Date

Dec 2012

Definition at line 248 of file mo_runoff.f90.

Referenced by mo_mhm::mhm().

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runoff_sat_zone()

subroutine, public mo_runoff::runoff_sat_zone	(	real(dp), intent(in)	k2,
		real(dp), intent(inout)	sat_storage,
		real(dp), intent(out)	baseflow
	)

Runoff generation for the saturated zone.

Calculates the runoff generation for the saturated zone. If the level of the ground water reservoir is zero, then the baseflow is also zero. If the level of the ground water reservoir is greater than zero, then the baseflow is equal to baseflow recession coefficient times the level of the ground water reservoir, which will be then reduced by the value of baseflow.

Parameters

[in]	REAL(dp) :: k2	Baseflow recession coefficient [TS-1]
[in,out]	REAL(dp) :: sat_storage	Groundwater storage [mm]
[out]	REAL(dp) :: baseflow	Baseflow [mm TS-1]

Authors

Vladyslav Prykhodko

Date

Dec 2012

Definition at line 191 of file mo_runoff.f90.

Referenced by mo_mhm::mhm().

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runoff_unsat_zone()

subroutine, public mo_runoff::runoff_unsat_zone	(	real(dp), intent(in)	k1,
		real(dp), intent(in)	kp,
		real(dp), intent(in)	k0,
		real(dp), intent(in)	alpha,
		real(dp), intent(in)	karst_loss,
		real(dp), intent(in)	pefec_soil,
		real(dp), intent(in)	unsat_thresh,
		real(dp), intent(inout)	sat_storage,
		real(dp), intent(inout)	unsat_storage,
		real(dp), intent(out)	slow_interflow,
		real(dp), intent(out)	fast_interflow,
		real(dp), intent(out)	perc
	)

Runoff generation for the saturated zone.

Calculates the runoff generation for the unsaturated zone. Calculates percolation, interflow and baseflow. Updates upper soil and groundwater storages.

Parameters

[in]	REAL(dp) :: k1	Recession coefficient of the upper reservoir,lower outlet [TS-1]
[in]	REAL(dp) :: kp	Percolation coefficient [TS-1]
[in]	REAL(dp) :: k0	Recession coefficient of the upperreservoir, upper outlet [TS-1]
[in]	REAL(dp) :: alpha	Exponent for the upper reservoir [-]
[in]	REAL(dp) :: karst_loss	Karstic percolation loss [-]
[in]	REAL(dp) :: pefec_soil	Input to the soil layer [mm]
[in]	REAL(dp) :: unsat_thresh	Threshold water depth in upper reservoir(for Runoff contribution) [mm]
[in,out]	REAL(dp) :: sat_storage	Groundwater storage [mm]
[in,out]	REAL(dp) :: unsat_storage	Upper soil storage [mm]
[out]	REAL(dp) :: slow_interflow	Slow runoff component [mm TS-1]
[out]	REAL(dp) :: fast_interflow	Fast runoff component [mm TS-1]
[out]	REAL(dp) :: perc	Percolation [mm TS-1]

Authors

Vladyslav Prykhodko

Date

Dec 2012

Definition at line 74 of file mo_runoff.f90.

References mo_common_constants::eps_dp.

Referenced by mo_mhm::mhm().

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