Search results for "Raindrop size distribution"

showing 3 items of 3 documents

Raindrop size distribution and terminal velocity for rainfall erosivity studies. A review

2019

Abstract The knowledge of the rainfall drop size distribution (DSD) at the land surface is essential for understanding precipitation mechanisms affecting soil erosion processes. Rainfall erosivity is defined as the potential of rain to cause erosion and it can be evaluated by rainfall kinetic power, which is determined by DSD and raindrop terminal velocity. This paper firstly deals with the raindrop terminal velocity estimate. Then the most widely used DSD are reviewed highlighting the difference between the raindrop size distribution per unit volume of air and that per unit area and time. The reliability of the available kinetic power-rainfall intensity relationships and their application …

010504 meteorology & atmospheric sciencesTerminal velocityRaindrop size distribution0207 environmental engineering02 engineering and technologyRainfall erosivitySeasonalitySeasonalityKinetic energyAtmospheric sciencesmedicine.disease01 natural sciencesRainfall kinetic powerDisdrometerDistribution (mathematics)ErosionmedicineEnvironmental scienceSettore AGR/08 - Idraulica Agraria E Sistemazioni Idraulico-ForestaliPrecipitationRainfall intensity020701 environmental engineeringIntensity (heat transfer)0105 earth and related environmental sciencesWater Science and Technology
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Predicting rainfall erosivity by momentum and kinetic energy in Mediterranean environment

2018

Abstract Rainfall erosivity is an index that describes the power of rainfall to cause soil erosion and it is used around the world for assessing and predicting soil loss on agricultural lands. Erosivity can be represented in terms of both rainfall momentum and kinetic energy, both calculated per unit time and area. Contrasting results on the representativeness of these two variables are available: some authors stated that momentum and kinetic energy are practically interchangeable in soil loss estimation while other found that kinetic energy is the most suitable expression of rainfall erosivity. The direct and continuous measurements of momentum and kinetic energy by a disdrometer allow als…

Mediterranean climateRill erosionSoil loMomentum (technical analysis)010504 meteorology & atmospheric sciencesThreshold limit valueRaindrop size distribution0208 environmental biotechnologyInterrill erosion02 engineering and technologyKinetic energyAtmospheric sciences01 natural sciences020801 environmental engineeringDisdrometerVolume (thermodynamics)Settore AGR/08 - Idraulica Agraria E Sistemazioni Idraulico-ForestaliEnvironmental sciencePrecipitationIntensity (heat transfer)0105 earth and related environmental sciencesWater Science and TechnologyJournal of Hydrology
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Characterizing rainfall erosivity by kinetic power-Median volume diameter relationship

2018

Abstract Kinetic power, i.e. kinetic energy per unit time and area, is the variable widely used to represent the rainfall erosivity which affects soil loss and sediment yield. This paper shows the results of an experimental investigation using the raindrop size distributions (DSDs) measured by an optical disdrometer installed at the Department of Agricultural, Food and Forestry Sciences of University of Palermo in Italy (June 2006–March 2014) and at the El Teularet experimental station in Spain (July 2015–May 2016). At first an analysis of the DSDs aggregated into intensity classes is carried out, then the measured kinetic power values are determined. The aggregated DSDs allowed to establis…

Sediment yieldMedian volume diameterRaindrop size distribution0208 environmental biotechnology02 engineering and technologyRainfall erosivityKinetic energyAtmospheric sciences020801 environmental engineeringPower (physics)Intensity (physics)Soil lossRainfall kinetic powerDisdrometerVolume (thermodynamics)Environmental scienceSettore AGR/08 - Idraulica Agraria E Sistemazioni Idraulico-ForestaliPrecipitationRainfall intensityRelleu (Geografia)Earth-Surface Processes
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