Search results for "Forestal"

showing 10 items of 1240 documents

Theoretical advancements on a recently proposed method to measure rainfall energy

2022

Soil erosion induced by rainfall is mainly due to the rainfall impact besides the consequent surface runoff. Rainfall kinetic energy is the most used variable to represent its erosivity. The latter represents the weathering attitude to erode soil and is a fundamental variable of the erosion process. Consequently, precise measurements of rainfall erosivity have to perform to develop a reliable prediction model of the erosive phenomenon. Currently, impact energy can be reliably measured only by disdrometers. These instruments measure the Drop Size Distribution (DSD) which, joined with the raindrop falling velocity, allow to calculate, by integration, the impact kinetic energy. However, disdro…

soil erosionrainfall erosivitykinetic powerSettore AGR/08 - Idraulica Agraria E Sistemazioni Idraulico-Forestalimomentummeasurement instrumentation2022 IEEE Workshop on Metrology for Agriculture and Forestry (MetroAgriFor)

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Measuring the USLE soil erodibility factor in the unit plots of Sparacia (southern Italy) experimental area

2022

The Universal Soil Loss Equation (USLE) is still widely used to predict soil loss by water erosion and to establish soil conservation measures. In this model, the soil erodibility factor K accounts for the susceptibility of the soil to be eroded due to the detachment and transport processes operated by the erosive agents. According to the USLE scheme, the K factor should be measured on unit plots, i.e., bare plots of given length (22 m) and steepness (9%) tilled along the maximum slope direction, but there is little evidence that there ever existed an actual unit plot between the plots used to develop the USLE. Given the difficulty in collecting sufficient data to adequately measure K, the …

soil loss plot measurements unit plot USLESettore AGR/08 - Idraulica Agraria E Sistemazioni Idraulico-Forestali

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Afforestation and reforestation: the Sicilian case study

2014

In some regions of the world such as the Northern Hemisphere, the abandonment of agricultural land is one of the most widespread forms of land use change. In general, abandonment is followed by colonization by herbaceous and woody plants. Since the 1950s, wide areas of Southern Italy have been afforested for soil conservation improvement. In order to quantify the effects of agricultural abandonment and artificial afforestation on soil organic carbon (SOC), a dataset of 48 Sicilian sites has been analyzed. Because of their high environmental variability, these sites can be considered as representative of Southern Italy and in general of the Mediterranean basin. Soil samples were taken throug…

soil organic carbon abandonment of agriculturalSecondary successiongeography.geographical_feature_categorySettore AGR/05 - Assestamento Forestale E SelvicolturaAgroforestryReforestationForestryPlant communitySoil carbonShrublandSettore AGR/02 - Agronomia E Coltivazioni ErbaceeGeographyAgricultural landAfforestationSoil conservation

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Compost Amendment Impact on Soil Physical Quality Estimated from Hysteretic Water Retention Curve

2022

Capacity-based indicators of soil physical quality (SPQ) and pore distribution parameters were proposed to assess the effects of compost amendment but their determination was limited to desorption water retention experiments. This study also considered the pore size distribution obtained from adsorption experiments to establish the effectiveness of compost amendment in modifying the physical and hydrological attributes of a sandy loam soil. Repacked soil samples with different compost to soil ratios, r, were subjected to a wetting–drying cycle, and the water retention data were fit to the van Genuchten model to obtain the pore volume distribution functions. The soil bulk density was m…

soil structure pore volume distribution function bulk density macroporosity air capacity plant available water capacity relative field capacity S-indexGeography Planning and Developmentsoil structure; pore volume distribution function; bulk density; macroporosity; air capacity; plant available water capacity; relative field capacity; S-indexSettore AGR/08 - Idraulica Agraria E Sistemazioni Idraulico-ForestaliAquatic ScienceBiochemistryWater Science and Technology

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Mapping soil water content under sparse vegetation and changeable sky conditions: comparison of two thermal inertia approaches

2013

A critical analysis of a thermal inertia approach to map surface soil water content on bare and sparsely vegetated soils by means of remotely sensed data is reported. The study area is an experimental field located in Barrax, Spain. In situ data were acquired within the Barrax 2011 research project. An advanced hyperspectral scanner airborne imager provides images in the visible/near-infrared and thermal infrared bands. Images were acquired both in day and night times by the Instituto Nacional de Técnica Aeroespacial between 12th and 13th of June 2011. The scene covers a corn irrigation pivot surrounded by bare soil, where a set of in situ data have been collected both previously and simult…

sparse vegetationCloud covermedia_common.quotation_subjectSettore ICAR/02 - Costruzioni Idrauliche E Marittime E IdrologiaHyperspectral imagingcloudiness.soil water contentVegetationthermal inertiaSoil thermal propertiesSkySoil waterThermographyGeneral Earth and Planetary SciencesEnvironmental scienceSettore AGR/08 - Idraulica Agraria E Sistemazioni Idraulico-ForestaliWater contentSettore ICAR/06 - Topografia E Cartografiamedia_commonRemote sensing

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Specie arboree esotiche invasive: il caso di Robinia e Ailanto

2019

Le specie arboree esotiche invasive non di rado rappresentano una quota significativa della composizione dendrologica dei boschi di neoformazione e preoccupano per gli impatti che possono causare sulla biodiversità. Recentemente, il timore riguarda i possibili effetti causati agli ecosistemi boschivi: infatti, gli ecosistemi forestali e quelli a essi contigui, come pascoli e prati permanenti, apparentemente più resilienti rispetto ad altri tipi di ecosistemi, ne subiscono l'aggressività in modo significativo e, anche in forza di provvedimenti legislativi, la pianificazione e gestione silvopastorale è chiamata a prestare sempre più attenzione a questo tema.

specie invasive ailanto robiniaSettore AGR/05 - Assestamento Forestale E Selvicoltura

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