Auradé Experimental Watershed

The Auradé Experimental Watershed encompasses and the agricultural watershed Montoussé (320 ha).

Site characteristics 

•     tributary of the Boulouze (tributary of the Save) to Auradé (village of Gers)
•     located 40 km west of Toulouse
•     in the Coteaux de Gascogne

Crops (rotating wheat / sunflower) occupy 90% of its surface. 
The clay soils (called Terreforts) belong to the sequence of calcareous brown-brown calcic-brown soils leached and developed on

• a muddy clay substratum
• a Miocene carbonate substratum *

Watershed Characteristics 

• The climate is temperate oceanic (T = 12-13 ° C and P = 700-800 mm.a-1) with high evapotranspiration (500 to 600 mm.a-1).
• The impermeable substratum favors surface runoff and the underground water reserves are very limited to a few perched sheets (sandy lenses) in the molasse and to alluvial and colluvial layers.

http://www.ecolab.omp.eu/bvea/