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Résultats de la recherche (10 résultats)

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Par Collection Par Auteur Par Date Par Sujet Par Titre
  • Interrill erosion of carbon and phosphorus from conventionally and organically farmed Devon silt soils
  • Agricultural practice ; Biogeochemistry ; Carbon ; Cultivated land ; Devon ; England ; Phosphorus ; Precipitation ; Soil erosion ; Soil properties ; Temperate zone ; United Kingdom ; Water erosion
  • In this study, the P and organic C content of sediment generated from 2 Devon silts under conventional (CS) and organic (OS) soil management were examined. Artificial rainfall was applied to the soils using 2 rainfall scenarios of differing
  • intensity and kinetic energy to determine the effects on the P and C enrichment in interrill sediment. Interrill soil erodibility was lower on the OS, irrespective of rainfall intensity. Sediment from both soils showed a significant enrichment in P and C
  • compared to the bulk soil. A comparison of soil and sediment properties indicates that crusting, P and C content as well as density and size of eroded aggregate fragments control P and C enrichment. Due to complex and dynamic interactions between P, soil
  • organic carbon (SOC) and interrill erosional processes, the nutrient and C status of sediments cannot be predicted based on soil P content, SOC or interrill erodibility alone.
  • [b1] Dep. of Environmental Sciences, Univ., Basel, Suisse
  • [a2] Environmental Science, Univ., Lancaster, Royaume-Uni
  • Estimating changes in effective values of surface detention, depression storage and friction factor at the interrill scale, using a cheap and fast method to mold the soil surface micro-topography
  • Belgium ; Cultivated land ; Erodibility ; Experiment plot ; Flemish Brabant ; Infiltration ; Loess ; Methodology ; Micromorphology ; Roughness ; Soil erosion ; Soil properties ; Water erosion
  • Surface detention and depression storage constitute the 2 conceptual storages of water at the soil surface and depend on the spatial configuration of the micro-topography. To be able to measure directly those storages and investigate how they evolve
  • soil and its artificial reproduction were measured with a laser scanner in order to assess the quality of the molding method. This novel molding method was applied to get 10 footprints of the micro-topography of a loamy bare soil, at different levels
  • of cumulative rainfall erosivity value (R), starting with a tilled soil, and letting it evolve with natural rain events. The AA. finally parametrized surface detention by an effective friction factor, using a classical equation for an equivalent laminar sheet
  • [b2] INRA, UR 0272 Science du sol, Centre de recherche, Orléans, France
  • [a2] Environmental Science, Univ., Lancaster, Royaume-Uni
  • Parameterization of the EROSION 2D/3D soil erosion model using a small-scale rainfall simulator and upstream runoff simulation
  • Cultivated land ; Experiment plot ; Germany ; Infiltration ; Model ; Rainfall simulation ; Roughness ; Saxony ; Soil erosion ; Soil properties ; Water erosion
  • This study presents a runoff feeding device, which is able to multiply the plot length virtually by supplying sediment loaded runoff from upstream. In the present study, this method is used to determine input parameters for the soil loss
  • and deposition model EROSION 2D/3D under field conditions. Based on the model parameters “skinfactor, soil resistance to erosion and surface roughness” the experimental approach is described exemplarily. The experimental results show that results from large-scale
  • [b1] Technical Univ., Soil and Water Conservation Unit., Freiberg, Allemagne
  • [a2] Environmental Science, Univ., Lancaster, Royaume-Uni
  • Comparative study ; Grassland ; Instrumentation ; Methodology ; Mountain ; Rainfall simulation ; Soil erosion ; Soil properties ; Switzerland ; Uri ; Water erosion
  • One goal of this study was to assess the suitability of a novel field hybrid rainfall simulator (FH simulator) that combines characteristics of a spray nozzle and a drop former rain simulator (DF) for erosion research. Two soils with different
  • textures were irrigated. A second goal of this study was to quantify the influence of vegetation and soil structure stability on soil erosion and runoff in a subalpine grassland area. The kinetic energy, drop size, triggered runoff and sediment yield
  • of both rain simulators were comparable, but kinetic energy and drop size differed for both simulators from natural rain. The results demonstrate that vegetation cover plays a crucial role in alpine soils for soil structure stability and erosion.
  • [a2] Environmental Science, Univ., Lancaster, Royaume-Uni
  • A portable wind and rainfall simulator for in situ soil erosion measurements
  • Andalusia ; Instrumentation ; Methodology ; Rainfall simulation ; Semi-arid area ; Soil erosion ; Spain ; Water erosion ; Wind ; Wind erosion
  • The aim of this study was to specify the wind and rainfall characteristics of the developed Portable Wind and Rainfall Simulator (PWRS) and to evaluate if its simulation quality and reproducibility is adequate for comparative soil erosion studies
  • in the field. Test results of the PWRS are very satisfactory. The analysis presented in this study suggests in particular very good reproducibility of wind and rain conditions. The PWRS should therefore be a useful device for comparative in situ soil erosion
  • measurements in the field and support the gathering of quantitative data on the relative importance of soil detachment rates between wind and water erosion, as well as windless and wind-driven rainfall.
  • [a2] Environmental Science, Univ., Lancaster, Royaume-Uni
  • China ; Forest ; Plant species ; Soil erosion ; South-Eastern China ; Spatial analysis ; Splash ; Subtropical zone ; Water erosion ; Zhejiang
  • [b1] Inst. of Geography, Chair of Physical Geography and Soil Science, Tübingen, Allemagne
  • [b3] Inst. of Soil Science, CAS, Nanjing, Chine
  • [a2] Environmental Science, Univ., Lancaster, Royaume-Uni
  • Calibration of the soil loss measurement method at the Masse experimental station
  • Calibration ; Experiment plot ; Italy ; Methodology ; Sampling ; Sediment budget ; Soil erosion ; Suspended load ; Umbria ; Water erosion
  • The paper introduces the results of the calibration of the runoff and sediment concentration measurement system adopted at the Masse experimental station to study erosion processes at the plot scale in Central Italy. Two soils of various particle
  • [a2] Environmental Science, Univ., Lancaster, Royaume-Uni
  • On the measurement of alpine soil erosion
  • Cultivated land ; Erosion rate ; Isotope analysis ; Methodology ; Mountain ; Plant canopy ; Quantitative analysis ; Rill wash ; Snow ; Soil erosion ; Switzerland ; Uri ; Water erosion
  • The aim of this study is to compare different methods and to conclude on suitability for the determination of alpine soil erosion. Furthermore, the advantages and disadvantages of the single measurement methods with regard to alpine basins
  • [a2] Environmental Science, Univ., Lancaster, Royaume-Uni
  • Andalusia ; Carrying capacity ; Experiment plot ; Rainfall simulation ; Rill wash ; Sediment transport ; Semi-arid area ; Soil erosion ; Spain ; Water erosion ; Watershed
  • failure and knickpoint retreat and the runoff effectiveness showed different and variable intensities. The results suggest that the existing soil erosion equations based on shear forces exerted by the flowing water are not able to describe rill erosion
  • [a2] Environmental Science, Univ., Lancaster, Royaume-Uni
  • [a2] Environmental Science, Univ., Lancaster, Royaume-Uni