FOLTON , N.

The study emphasize the role of the anisotropy of the metamorphic rocks, and particularly of the relation between the direction of the incline of the slopes and that of the planar structures of the rocks, in the circulation of water. The Maurets catchment (8,37 km carré), which has equipment of four limnigraphic stations and three recording...

The reduction in the surface area of Lake Chad from 25,000 to 4,000 km2 between 1972 and 1987, in connection with the great drought of the 1980s in the Sahel, had a major impact on the way of life of the riparian populations, although very low lake levels had already been observed several times during the 20th century. The assessment of the...

Forest hydrology studies carried out in France have focused mainly on the Mediterranean part of the country. Three experimental catchment groups exist and have been monitored over a long period. Some forested catchments (Draix catchment) underwent no change during the study period, while others experienced either clear cutting (Lozère...