Paysages virtuels et analyse de scénarios pour évaluer les impacts ...

Results
Virtual landscape construction
Soil pattern factor levels
Maps of soil thickness and waterlogging class are presented in Fig. IV.27 and their characteristics are
summarized in Table IV.7. The waterlogged class for the “thin” and “observed” soil patterns appeared only in
the valley bottomland, whereas the well-drained class occupies the catchment divides and the South-East part
of the catchment, which are characterized by steeper slopes. The flatter northern part of the catchment is
occupied by the intermediate soil class. The observed waterlogged soil class was spatially extended by
incorporating pixels with a DTI higher than 4. The waterlogged area doubled from 14% to 29% of the
catchment area, and the added area came mainly from pixels of the intermediate class located in the northern
part of the catchment (Fig. IV.27).
Fig. IV.27: Soil waterlogging class and thickness maps used in the three soil patterns of the virtual landscapes.
IV. Évaluation environnementale multi-critères et multi-ressources – p. 117