This page summarises the step implemented in the model built to provode an assessment of soil erosion risk thruogout France. It gives
access to the following:

• a detailed presentation of the model ,
• maps and reports (links flagged by the sign " ") of the model steps applied to France and of its results

(by clicking on any of the icons of this figure):

• Data source: vector version of the CORINE Land Cover at scale 1: 100.000, SAI/JRC Ispra.
• Data processing: reclassification into 9 land use classes and resampling to 250 m resolution.
• More details: see presentation of the model .
• Map:  Land use .

• Data source: Soil Geographical Database of Europe at scale 1.000.000, ESB/JRC Ispra.
• Data processing: crusting and erodibility parameters are deduced from the soil caractheristics using chained pedotranfer rules.
• More details: see presentation of the model and understanding "purity" maps .
• Maps of soils caracteristics used as input to pedotransfer rules:

First and second level FAO legend soil name:	Soil1 /  purity	Soil2 /  purity
Dominant and secondary surface textural class:	Text1 /  purity	Text2 /  purity
First and second level dominant parent materiel code:	Mat11 /  purity	Mat12 /  purity

• Chaining and contents of pedotransfert rules:

• More details: quick understanding of pedotransfer rules , and full specifications of the pedotransfer rules project .
• Maps of intermediate soil parameters output from pedotransfer rules:

Dominant surface textural class (improved Text1):	Text /  purity
Textural factor of soil crusting:	Text-crust /  purity
Textural factor of soil erodibility:	Text-erod /  purity
Physi-chemical factor of soil crusting & erodibility:	Phys-chim /  purity

• Maps of soil parameters output from pedotransfer rules and used in the model:

Soil crusting class:	Crusting /  purity
Soil erodibility class:	Erodibility /  purity

• Data source: 250 m resolution digital elevation model (DEM), IGN ( http:// ).
• Data processing: slopes are computed from DEM, then classified into 8 classes.
• More details: see presentation of the model .
• Maps:

Elevation:	Elevation
Slope classes:	Slopes

• Data source: "DEMIURGE" watershed basins (the threeshold circulation network is 1097 pixels), INRA Orléans;

                        French district, INSEE;
                        French "Small Agricultural Region" (SAR), ____;
                        And French department, INSEE.
 
• Data processing: none.
• Maps:  basins ,  districts ,  SAR ,  departments.

• Data processing: land use, crusting, slope and erodibility parameters are combined through an expert system model at the cell level to produce an evaluation of sensitivity of the soils to erosion.

Results can then be aggregated by spatial integration units (SIU) thought an erosion sensitivity aggregation model .
• More details: see presentation of the model and rules for aggregation .
• Maps and reports:

Sensitivity to erosion at the pixel level:	Map /  Report
By basins integrated sensitivity to erosion:	Map /  Report
By districts integrated sensitivity to erosion:	Map /  Report
By SAR integrated sensitivity to erosion:	Map /  Report
By departments integrated sensitivity to erosion:	Map /  Report
By zones hydro integrated sensitivity to erosion:	Map /  Report

• Data source: 30 years of daily meteorological data covering France at a resolution of 5 x 5 km cells, METEO-FRANCE.
• Data processing: seasonal rainfall depth are classified into quintiles and combined with seasonal rainfall intensity (3 classes) to evaluate an overall rainfall erosivity parameter.
• More details: see presentation of the model .
• Maps:

Rainfall depth quintiles (mm):	Spring	Summer	Autumn	Winter	Annual
Rainfall erosivity parameter:	Spring	Summer	Autumn	Winter	Annual

• Data processing: sensitivity to erosion is combined with rainfall erosivity through the expert system model at the cell level to produce evaluations of seasonal and annual soil erosion risks.
• Results can then be aggregated by spatial integration units (SIU) thought an erosion risk aggregation model .
• More details: see presentation of the model and rules for aggregation .
• Maps and reports:

Seasons -> Documents | v	Spring	Summer	Autumn	Winter	Annual
Erosion risk at pixel scale	Map   /  Report	Map   /  Report	Map   /  Report	Map   /  Report	Map   /  Report
By basins integrated erosion risk	Map   /  Report	Map   /  Report	Map   /  Report	Map   /  Report	Map   /  Report
By districts integrated erosion risk	Map   /  Report	Map   /  Report	Map   /  Report	Map   /  Report	Map   / Report
By SAR integrated erosion risk	Map   /  Report	Map   /  Report	Map   /  Report	Map   /  Report	Map   /  Report
By departments integrated erosion risk	Map   /  Report	Map   /  Report	Map   /  Report	Map   /  Report	Map   /  Report
By zones hydro integrated erosion risk					Map   /  Report
^  | Documents Seasons ->	Spring	Summer	Autumn	Winter	Annual