Opened 10 years ago
Closed 10 years ago
#23 closed task (fixed)
Externalization of CWRR parameters
Reported by: | dsolyga | Owned by: | dsolyga |
---|---|---|---|
Priority: | major | Milestone: | ORCHIDEE 1.9.7 |
Component: | Physical processes | Version: | orchidee_1_9_6 |
Keywords: | externalization, hydrology, CWRR | Cc: |
Description
The parameters for the CWRR hydrology are not externalized in the trunk. I propose a list of potential parameters which could be externalized.
I listed the parameters for the modules constantes_soil, hydrol and routing. I put N (NO) to parameters I considered constants (physical constants, fixed values...).
Module | Name | Y/N |
constantes_soil | so_cond | N |
so_capa | N | |
so_capa_dry | N | |
so_cond_dry | N | |
so_capa_wet | N | |
so_cond_wet | N | |
sn_cond | N | |
sn_dens | N | |
qwilt | ||
min_resdis | ||
min_drain | ||
max_drain | ||
exp_drain | ||
mx_eau_eau | ||
rsol_cste | ||
hcrit_litter | ||
nscm | ||
nbint | N | |
w_time |
Module | Subroutine | Y/N | |
hydrol | drain_rest_cste | ||
nvan | |||
avan | |||
mcr | |||
mcs | |||
ks | |||
ds | |||
pcent | |||
free_drain_max | |||
mcf | |||
mcw | |||
mc_awet | |||
mc_adry | |||
psis | |||
hydrol_var_init | n0 | ||
hydrol_var_init | nk_rel | ||
hydrol_var_init | ak_rel | ||
hydrol_soil | frac_mcs | ||
routing | beta | ||
betap | |||
floodcri | |||
pondcri | |||
min_reservoir | |||
crop_coef |
If you think of another parameters to externalize, you can complete
the list.
Cleaning :
Could we delete the following variables ?
constantes_soil :
INTEGER, SAVE :: jsc_default = 2 REAL(r_std),DIMENSION(nstm),SAVE :: soiltype_default = & & (/ 0.0, 1.0, 0.0 /) INTEGER(i_std),PARAMETER :: nslm_min=10 INTEGER(i_std),PARAMETER :: nslm_max=13
routing :
routing.f90: REAL(r_std), PARAMETER :: pond_bas = 50.0
Suggestions :
- The different set of parameters used for the different soils classification may be unified.
- With Nicolas we also suggest to think of a generic pre-treatement where it could be possible to associate different PFTS to different soil types.
Attachments (3)
Change History (8)
Changed 10 years ago by dsolyga
comment:1 Changed 10 years ago by dsolyga
- Status changed from new to accepted
Update (25/10/2012) :
I found also that the parameter frac_mcs in hydrol_soil was not used :
REAL(r_std), PARAMETER :: frac_mcs = 0.66 !! temporary depth
Should we delete it ?
comment:2 Changed 10 years ago by dsolyga
Parameters list updated before final discussion (1st synthesis of the discussion) :
Module | Subroutine | Parameter Name | Description | To externalize | Keyword |
constantes_soil | so_cond | Average Thermal Conductivity of soils | To discuss | ||
constantes_soil | so_capa | Average Heat capacity of soils | To discuss | ||
constantes_soil | so_cond_dry | Dry soil Thermal Conductivity of soils | Y | ||
constantes_soil | so_capa_wet | Wet soil Heat capacity of soils | Y | ||
constantes_soil | so_cond_wet | Wet soil Thermal Conductivity of soils | Y | ||
constantes_soil | sn_cond | Thermal Conductivity of snow | Y | ||
constantes_soil | sn_dens | Snow density for the soil thermodynamics | Y | ||
constantes_soil | qwilt | Wilting point | To discuss | ||
constantes_soil | min_resdis | The minimal size we allow for the upper reservoir | To discuss |
constantes_soil | min_drain | Diffusion constant for the slow regime | To discuss | ||
constantes_soil | max_drain | Diffusion constant for the fast regime | To discuss | ||
constantes_soil | exp_drain | The exponential in the diffusion law | To discuss | ||
constantes_soil | mx_eau_eau | Maximum quantity of water | To discuss | ||
constantes_soil | rsol_cste | Constant in the computation of resistance for bare soil evaporation | Y | ||
constantes_soil | hcrit_litter | Scaling depth for litter humidity | To discuss | ||
constantes_soil | nscm | Number of soil texture classes – WARNING clarify link with nbtext & nstm | To discuss | ||
constantes_soil | nbint | Number of interval for CWRR | N | ||
constantes_soil | w_time | Time weighting for discretisation | N | ||
constantes_soil | dpu_max | Maximum depth of soil reservoir | Y |
hydrol | drain_rest_cste | time constant in days to return to free drainage after return flow | Deletion | ||
hydrol | nvan | Van Genuchten coeficients n | Y | ||
hydrol | avan | Van Genuchten coeficients a | Y | ||
hydrol | mcr | Residual humidity | Y | ||
hydrol | mcs | Saturation humidity | Y | ||
hydrol | ks | Hydraulic conductivity Saturation for each soil type | Y | ||
hydrol | ds | Hydraulic diffusivity for each soil type and soil level | Y | ||
hydrol | pcent | Fraction of saturated volumetric soil moisture above which transpir is max | Y | ||
hydrol | free_drain_max | Max value of the permeability coeff at the bottom of the soil | Y | ||
hydrol | mcf | Field capacity | Y | ||
hydrol | mcw | Wilting point | Y | ||
hydrol | mc_awet | Vol. wat. cont. above which albedo is cst | Y | ||
hydrol | mc_adry | Vol. wat. cont. below which albedo is cst | Y | ||
hydrol | psis | Matrix potential at saturation | Y |
hydrol | hydrol_var_init | n0 | fitted value for relation log((n-n0)/(n_ref-n0)) = nk_rel * log(k/k_ref) | To discuss | |
hydrol | hydrol_var_init | nk_rel | fitted value for relation log((n-n0)/(n_ref-n0)) = nk_rel * log(k/k_ref ) | To discuss | |
hydrol | hydrol_var_init | ak_rel | fitted value for relation log((n-n0)/(n_ref-n0)) = nk_rel * log(k/k_ref) | To discuss |
hydrol | hydrol_var_init | f_ks | exponential factor for decay of ksat with depth | Y | |
hydrol | hydrol_var_init | dp_comp | depth at which the 'compacted value' (Van Genuchten) of ksat is reached | Y | |
hydrol | hydrol_var_init | kfact_max | Maximum factor for K due to depth | Y |
routing | beta | Parameter to fix the shape of the floodplain | Y | ||
routing | betap | Ratio of the basin surface intercepted by ponds and the maximum surface of ponds | Y | ||
routing | floodcri | Potential height for which all the basin is flooded | Y | ||
routing | pondcri | Potential height for which all the basin is a pond | Y | ||
routing | min_reservoir | A minimum amount of water in the reservoir | To discuss | ||
routing | crop_coef | Empirical crop coefficient dependent on vegetation characteristics | To discuss |
comment:3 Changed 10 years ago by dsolyga
Meeting (13/11/2012) :
The list of the parameters was discussed. In addition to the externalization, it was decided to clean the code :
- so_cond and so_capa will be calculated (see ticket #39).
- qwilt will be deleted. In hydrolc, we will replace the following line :
IF (dsp(ji,jv).GT.(dpu_max - (qwilt / ruu_ch(ji))) .OR. bqsb(ji,jv).LT.zero) THEN
by :IF (dsp(ji,jv).GT.(dpu_max - min_sechiba) .OR. bqsb(ji,jv).LT.zero) THEN
- rename mx_eau_eau in mx_eau_nobio. When mx_eau_eau was used for a pft, it will be replaced by the pft-parameter wmax_veg. mx_eau_eau was used in hydrolc :
! lakes, ice, cities... mx_eau_var(ji) = mx_eau_eau*dpu_max
- In hydrol, delete the fao2 classification. Replace deux by dpu_max when it is the case.
- The set of CWRR parameters nvan, avan, ks, mcr, mcs, mcw, mcf cannot have arbitrary values because these parameters are linked to the soil texture. Need to be discussed.
- routing : the parameter crop_coef will be deleted. min_reservoir could be replaced by min_sechiba.
comment:4 Changed 10 years ago by aducharne
Parameter psis:
1) in constantes_soil.f90, two sets of values are defined, for FAO and USDA textural classifications (with 3 and 12 classes respectively). In all cases, psis= -300 mm.
2) in hydrol.f90, psis is defined from either psis_fao or psis_usda, but psis is not used further in the code.
If I understood correctly, psis from Carsel and Parrish corresponds to 1/alpha from Van Genuchten, and psis could be cleaned out from the code.
Changed 10 years ago by dsolyga
comment:5 Changed 10 years ago by dsolyga
- Milestone changed from ORCHIDEE 2.0 to ORCHIDEE 1.9.7
- Resolution set to fixed
- Status changed from accepted to closed
The list of keywords for the parameters (except routing) used could be found in CWRR_parameters_AD2.xls. For the routing parameters,the following keywords have
been defined :
Parameter Name | Keyword |
beta | FLOOD_BETA |
betap | POND_BETAP |
floodcri | FLOOD_CRI |
pondcri | POND_CRI |
Externalization done. See commit [1082].
By the same occasion, the code was simplified :
- Deletion of fao2 classification
- Deletion of Choisnel parameters : qwilt, min_resdis
- Deletion of CWRR parameters : psis, ds, free_drain_cte
- Deletion of routing parameters : min_reservoir, crop_coef
- mx_eau_eau is renamed as mx_eau_nobio
- in hydrolc.f90: mx_eau_eau is replaced by wmax_veg when necessary.
- Calculation of so_cond and so_capa : see #39
The updated list of parameters is available on Documentation/OrchideeParameters.
Add list of parameters in excel format