Psychology and aggression

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/68264/2/10.1177_002200275900300301.pd

Debris flow characteristics and relationships in the Central Spanish Pyrenees

Unconfined debris flows (i.e., not in incised channels) are one of the most active geomorphic processes in mountainous areas. Since they can threaten settlements and infrastructure, statistical and physically based procedures have been developed to assess the potential for landslide erosion. In this study, information on debris flow characteristics was obtained in the field to define the debris flow runout distance and to establish relationships between debris flow parameters. Such relationships are needed for building models which allow us to improve the spatial prediction of debris flow hazards. In general, unconfined debris flows triggered in the Flysch Sector of the Central Spanish Pyrenees are of the same order of magnitude as others reported in the literature. The deposition of sediment started at 17.8º, and the runout distance represented 60% of the difference in height between the head of the landslide and the point at which deposition started. The runout distance was relatively well correlated with the volume of sediment

Simulation de l'impact du couvert végétal sur le transport en masse des sédiments dans deux bassins méditerranéens, application du modèle Shetran

The EC finded DM2E project, completed in November 1994, was aimed at evaluating the role which vegetation cover and its degradation by natural and human means plays in determining hydrological, erosion and water quality regimes in areas undergoing desertification, with specific reference to Mediterranean Europe. As the Newcastle component of the work, the SHETRAN flow and sediment transport model was applied to the Rimbaud and Draix catchments situated in the South of France to investigate its ability to represent the impacts of vegetation changes on catchment sediment yield.Le projet DM2E financé par l'UE, achevé en novembre 1994, était destiné à évaluer le rôle que le couvert de végétation et sa dégradation par la nature et l'homme joue dans la définition des régimes de la qualité de l'eau, de l'érosion et des régimes hydrologiques dans des régions en voie de désertification en référence spécifique à l'Europe méditerranéenne. Composant de Newcastle de ce travail, le modèle de transport des sédiments et d'écoulement SHETRAN a été appliqué aux bassins hydrographiques de Rimbaud et de Draix situés dans le sud de la France pour étudier sa capacité à représenter les impacts des changements de la végétation sur le rendement des sédiments de captage