Changes between Version 11 and Version 12 of Documentation/Ancillary

Timestamp:

2021-07-16T19:10:52+02:00 (3 years ago)

Author:

aducharne

Comment:

--

Documentation/Ancillary

@@ -79 +79 @@
 More details in http://forge.ipsl.jussieu.fr/orchidee/raw-attachment/wiki/Documentation/UserGuide/eqs_hydrol.pdf, section "6. Soil Texture".
 
-In branch 2.2 (starting r6954), we've introduced the possibility to describe the soil properties with other maps :
-- alternative soil texture maps:
-   - ''soils_param_SoilGrids_5km.nc'' and ''soils_param_SoilGrids_halfdeg.nc'': the 1km SoilGrids maps of %sand,silt,clay have been converted to the 12 USDA classes, and upscaled at two resolutions : 
+'''In branch 2.2 (starting r6954), we've introduced the possibility to describe the soil properties with other maps, which involves the keyword SPMIPEXP:''' 
+- alternative soil texture maps (default value of SPMIPEXP, so you only have to declare the files in sechiba.card):
+   - ''soils_param_SoilGrids_5km.nc'' and ''soils_param_SoilGrids_halfdeg.nc'': the 1km SoilGrids maps of the percent sand,silt,clay have been converted to the 12 USDA classes, and upscaled at two resolutions : 
    - ''soils_param_usda_with_clay_oxisol.nc'': modified Reynolds soil texture map, in which the clay texture (nsc=12) is split in two classes, the swelling Clays which keep the class index 12 and the corersponding soil parameters, and the non-swelling Clays (Oxisols), corresponding to a new soil class 13, with new soil hard-coded parameters, (cf the [https://tel.archives-ouvertes.fr/tel-03110807/document PhD thesis of Salma Tafasca, 2020], chapter 4).
-- maps of soil parameters (Ks, porosity, residual moisture content, Van Genuchten n and alpha), using KEYWORD SPMIPEXP = exp1
+- maps of soil parameters (Ks, porosity, residual moisture content, Van Genuchten n and alpha), using KEYWORD SPMIPEXP = maps; you only need to declare the selected files (among the list below) in your sechiba.card
    - ''hydrol_params_spmip_halfdeg.nc'': this file contains soil hydraulic parameters given by the SP-MIP team 
    - ''hydrol_params_Zhang2018_halfdeg.nc'': ks, theta_s and theta_r are taken from Zhang et al. (2018), n and alpha are obtained using the SoilGrids_halfdeg.nc texture map and the Schaap et al. (2001) pedo-transfer function. NA is replaced with the parameters of the Loam class. More details in the PhD thesis of Salma Tafasca chapter 5, where this map is used in the simulation SIMUSOC2
    - ''hydrol_params_with_porosity_Reynolds.nc'': contains soil hydraulic parameters derived from the Reynolds soil texture map, using the pedo-transfer function from Carsel & Parrish, except for porosity, which is taken from the porosity map of Reynolds et al. (2000). Field capacity and wilting point are also calculated based on this porosity.  More details in the PhD thesis of Salma Tafasca chapter 5, where this map is used in the simulation SIMUSOC1.
    - ''hydrol_params_salma_SOC3.nc'': contains soil hydraulic parameters derived from soil texture (Reynolds + Carsel & Parrish 1988) and soil organic content (from an ORCHIDEE simulation described in Qiu et al., 2019). The construction of these maps is decribed in the PhD thesis of Salma Tafasca chapter 5, where this map is used in the simulation SIMUSOC3.
+- you can finally impose a uniform texture over the globe owing to two keywords: SPMIPEXP = unif, then UNIF_CASE = a to d ('a' for loamy sand, 'b' for loam, 'c' for silt, 'd' for swelling clay) 
 
 More details in SRF/SOIL/README_SPMIP