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Résultats de la recherche (7 résultats)

Geomorphic threshold conditions for ephemeral gully incision

In this paper the available information on the initiation and location of (ephemeral) gullies is summarised, focusing on the relationship between the upslope drainage area and the critical slope gradient for ephemeral gully initiation. Furthermore

On the origin of rock fragment mulches on vertisols : a case study from the Ethiopian highlands

This paper presents the case of a natural rock fragment (RF) mulch whose lithology indicates that the RF are up-squeezed by the local vertisol. Based on the data from the experimental site located in the pass of Enda Maryam, Tigray, Northern

Origin and evolution of closed depressions in central Belgium, European loess belt

The study area is part of the Belgian loess belt and is located south of Leuven. The objectives of this study are : to determine the spatial distribution of closed depressions (CDs) within an ancient forest area and under cropland; to determine

Topographical thresholds for ephemeral gully initiation in intensively cultivated areas of the Mediterranean

Ephemeral gullying is an important erosion process in Mediterranean areas. The objective of this study was to investigate to what extent one could use field measurements of S (local slope) and A (drainage-basin area) to predict the location

Runoff and soil loss under individual plants of a semi-arid Mediterranean shrubland : influence of plant morphology and rainfall intensity

of the Mediterranean shrubland in reducing soil loss and runoff volume at the micro- (plant) scale, and to determine its interaction with plant morphology and rainfall characteristics. The experimental area of El Ahorcado is located in the Municipality of Cofrentes

Medium-term evolution of a gully developed in a loess-derived soil

, which was not erased by subsequent tillage. Between June 1986 and December 1999, 8 field surveys were conducted to measure gully dimensions. Discussion of the results. Although this gully is located in a cultivated area, it became permanent due

Surface runoff and seed trapping efficiency of shrubs in a regenerating semiarid woodland in northern Ethiopia

seeds in the bare inter-plant areas; and that seeds in the latter are more likely to be translocated by runoff to microsites under shrubs than to other open areas. The study area is located in the Geba river catchment, central Tigray, northern Ethiopia.