FOX , Dennis

Micromorphological techniques have frequently been used to describe processes leading to surface crusting. Image analysis can be helpful in quantifying changes in porosity necessary for estimating hydraulic parameters in crust infiltration models. The objective of this study was to quantify changes in pore area and frequency for three pore...

International audience

The influence of slope gradient on erosion rate differs for rill and interrill conditions. Rill erosion increases substantially more with increasing slope gradient than interrill erosion. Combining the two erosion processes into single data sets led to the development of regression equations Ž. e.g., USLE that overestimated the effect of slope...

A soil erosion risk map is an essential tool for soil conservation planning. It provides a general view of erosion problems and permits the identification of sectors requiring an emergency intervention. The erosion risk map produced in this study results from the spatialisation of the « Revised Universal Soil Loss Equation » (RUSLE). The...

Une carte du risque érosif est un outil indispensable dans une démarche de lutte contre l'érosion. Elle permet en effet d'avoir une vue d'ensemble des problèmes et donc de localiser les secteurs nécessitant une intervention prioritaire. La carte des risques réalisée dans cette étude résulte de la spatialisation de la Revised Universal Soil Loss...

Forest fires can alter several soil properties influencing soil erosion and runoff processes in addition to removing all or part of the vegetative cover. These include organic matter content, aggregate stability and water repellency. Soil erodibility and saturated hydraulic conductivity depend on these properties and their response varies...

Runoff and erosion rates are known to increase substantially after a major forest fire. Erosion control measures therefore need to be put into place quickly after a large fire, and determining where to locate the measures requires accurate mapping of post fire erosion risk. Burn severity can be determined from field observations, but these are...

Forest fires can alter several soil properties influencing soil erosion and runoff processes in addition to removing all or part of the vegetative cover. These include organic matter content, aggregate stability and water repellency. Soil erodibility and saturated hydraulic conductivity depend on these properties and their response varies...

Despite numerous studies, the relationship between slope angle and infiltration rate remains unclear. Under different experimental conditions, new processes may be introduced which influence the relationship. The presence of rills, for example, may significantly affect the relationship between slope angle and infiltration rate, so distinct...

The Euro-Mediterranean area has experienced widespread land cover change since 1950, but few studies of land cover change explicitly explore spatial constraints on land cover change patterns. The main objective of this study was to analyze the spatial dynamics of land cover change from 1950 to 2008 in a French Mediterranean catchment. Aerial...

Forest fires can alter several soil properties influencing soil erosion and runoff processes in addition to removing all or part of the vegetative cover. These include organic matter content, aggregate stability and water repellency. Soil erodibility and saturated hydraulic conductivity depend on these properties and their response varies...

International audience

The Mediterranean basin has undergone widespread land cover change. Urbanization of coastal areas, land abandonment of steeper slopes, and agricultural intensification in alluvial plains are recurrent themes. The objective of this study was to examine how vineyard land cover changes have affected agricultural soil erosion in a 50 year period...

Land cover has been changing rapidly throughout the world, and this issue is important to researchers, urban planners, and ecologists for sustainable land cover planning for the future. Many modeling tools have been developed to explore and evaluate possible land cover scenarios in future and time scales vary greatly from one study to another....

Landuse organisation in Mediterranean France tends to follow a typical pattern where large flat coastal areas are densely urbanised and oriented toward summer tourism, inland alluvial plains are dedicated to vineyards for wine making, and hilly areas surrounding inland plains are occupied by forests and isolated housing. This spatial...

Continuazione degli studi relativi alla tempesta Alex svolti dal CNRS: 1/ Mappatura della precipitazione accumulata in valle durante la tempesta Alex; 2/ Modellazione idrologica delle portate del Roia in Francia-Italia; 3/ Trasporto sedimentario nel Roia: scambio di esperienze dopo 7 anni di monitoraggio e modellazione dei flussi sedimentari...

International audience

International audience

Over the past few decades, the influence of surface sealing on infiltration has been the subject of numerous publications. However, very few of these experiments have considered the effect of spatial variability in seal hydraulic characteristics on infiltration. Field and laboratory observations have demonstrated that seal characteristics vary...

Comprendre l'organisation spatiale du milieu naturel est d'une grande importance en hydrologie puisque c'est son agencement qui impose les mécanismes qui génèrent et dirigent les flux hydriques. En cela, une cartographie des chemins de l'eau dans le milieu naturel s'avère être un outil intéressant pour expliquer le devenir de l'eau dans un...

Effective erosion control requires both a sound understanding of the physical context and sufficient motivation on the part of farmers to act, and in Europe this almost inevitably depends on financial subsidies. In southwest France, intense spring and summer storms lead to large scale sediment deposition on roadways, and cleanup costs are a...

Forest fires burn an average of about 440 000 ha each year in southern Europe. These fires cause numerous casualties and deaths and destroy houses and other infrastructure. In order to elaborate on suitable firefighting strategies, complex interactions between human and environmental factors must be taken into account. In this study, we...

Effective erosion control requires both a sound understanding of the physical context and sufficient motivation on the part of farmers to act, and in Europe this almost inevitably depends on financial subsidies. In southwest France, intense spring and summer storms lead to large scale sediment deposition on roadways, and cleanup costs are a...

Several hydrological models are currently in use for predicting floods at the catchment outlet. These vary from lumped rainfall-runoff models which ignore flow processes in the catchment to distributed process-based models which attempt to quantify lateral and vertical fluxes. Few of these models integrate extensive field work and most are...

Effective erosion control requires both a sound understanding of the physical context and sufficient motivation on the part of farmers to act, and in Europe this almost inevitably depends on financial subsidies. In south-west France, intense spring and summer storms lead to large scale sediment deposition on roadways, and cleanup costs are a...