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3 Landform Analysis

3 2011

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Sediment transport along the gullies in flysch badlands : an example from SW Slovenia

Zorn M.

Landform Analysis

2011

Vol. 17

229-235

Sediment transport along erosion gullies in flysch badlands under Sub-Mediterranean climate is presented. Presented are weekly measurements, compiled measurements by months, as well as correlations of sediment transport with selected weather data. Sediment transport was measured up to 19 kg m-2 and was largely dependent on special weather conditions.

Scale effects on sediment yield from badland areas in Mediterranean environments

Martínez-Murillo J. F., Nadal-Romero E., Vanmaercke M., Poesen J.

Landform Analysis

2011

Vol. 17

105-109

This study investigates area-specific Sediment Yield (SY) in Mediterranean badland areas at different spatial scales using a SY-database compiled from scientific literature. Relationships between the plot and catchment characteristics and the corresponding SY-data are analyzed. Results indicate that in Mediterranean environments SY is larger than in other environments,especially in badlands where a high variability of SY is observed depending on the spatial scale. In intensively gullied badlands,a complex plot or drainage area (A) -SY relationship is observed: for A ranging between 10-5 and 10 ha,SY is very high (mean SY equals 475 t ha-1 yr-1),whereas for A greater than 10 ha,SY decreases with increasing A (mean SY less than 100 t ha-1 yr-1).

Hillslope scale effects of cropland abandonment on gully development : an example from Central Italy

Vergari F., Della Seta M., Del Monte M., Fredi P., Palmieri E. L.

Landform Analysis

2011

Vol. 17

219-223

This paper is focused on the quantification of the effects of cropland abandonment on gully development and denudation rates for a sample hillslope of Central Italy that underwent cropland abandonment, located within the Tevere River Basin. This goal is pursued by the integration of different erosion monitoring and estimation techniques: the application of DGPS surveys let us estimating the erosion rate since agricultural practices were interrupted (30 years ago) and the traditional erosion monitoring technique with pins was applied during two years in order to validate DGPS survey results and comprehend the dynamics of geomorphic processes affecting the considered denudation hot spot. The investigations proved that cropland abandonment provoked an intensification of erosion rate in the study area, as already observed in other sites of the Mediterranean region. Moreover this work contributes to the comprehension of the applicability of DGPS surveys to compute erosion rates for fairly large time-spans.