Search results for "FOREST"
showing 10 items of 3780 documents
Brevi considerazioni su piogge intense e potenzialità di produzione del deflusso superficiale in Sicilia
2013
Vengono presentati i metodi aggiornati per la stima delle precipitazioni intense massime annue di fissato tempo di ritorno in Sicilia. Dall‟osservazione della distribuzione spaziale dei parametri assunti nei modelli di stima emergono aree a maggior rischio riguardo l‟intensità di pioggia, qui commentate. Il richiamo a recenti studi che riguardano la produzione del deflusso superficiale a scala media annua o a scala di evento, consente di avanzare alcune considerazioni di tipo spaziale, con particolare attenzione all‟area del messinese, su questa importante propensione idrologica notoriamente fonte di dissesto idrogeologico e di pericolo alluvionale. The updated methods for the estimation of…
In situ polymerization of soil organic matter by oxidative biomimetic catalysis
2017
Abstract Background Agricultural practices that enhance organic matter content in soil can play a central role in sequestering soil organic carbon (SOC) and reducing greenhouse gases emissions. Methods We used a water-soluble iron-porphyrin to catalyze directly in situ oxidative polymerization of soil organic matter in the presence of H2O2 oxidant, with the aim to enhance OC stabilization, and, consequently, reduce CO2 emissions from soil. The occurred SOC stabilization was assessed by monitoring soil aggregate stability, OC distribution in water-soluble aggregates, soil respiration, and extraction yields of humic and fulvic acids. Results Soil treatment with H2O2 and iron-porphyrin increas…
Castelporziano: una smart forest
2015
Il Consiglio per la Ricerca in Agricoltura (CRA) – con la sua Unità di Ricerca per il Monitoraggio e la Pianificazione Forestale di Trento – in collaborazione con la società di spin-off del CRA “EFFETRESEIZERO” Srl (specializzata in geomatica e informatica forestale) ha messo a punto uno strumento informatizzato “geografico” innovativo, per descrivere e quantificare minuziosamente il patrimonio boschivo della Tenuta Presidenziale di Castelporziano al 2014.
Comparison between Willingness-to-Pay expressed by a panel of forestry experts and by a sample of non-expert respondents in a pilot survey conducted …
2005
This work deals with an empirical analysis aiming to check the possibility to substitute a panel of forestry experts for a sample of non-expert respondents in a pilot survey for a CVM study. This methodology in the case study has focussed on the estimate of the economic value associated with the reduction in wood fire risk in a protected area of southern Sicily. The experiment consisted in carrying out two surveys by means of the same questionnaire with an open-ended elicitation question for WTP’s. The first survey was addressed to a sample of 227 “non-expert” respondents, whereas in the second one 15 forest technicians working in Sicily were interviewed in their quality of experts in fores…
Assessing Hydrus-2D model to investigate the effects of different on-farm irrigation strategies on potato crop under subsurface drip irrigation
2019
The objective of this paper was to assess the performance of Hydrus-2D model to simulate the effects of different on-farm irrigation strategies applied on potato crop. The ability of the model to simulate the stress coefficient (Ks), obtained as the ratio between actual and maximum transpiration, and to define the productive function of potato crop under the semi-arid conditions of central Tunisia were also evaluated. Experiments were carried out on potato crop under full (FI) and deficit irrigation (DI) and two different water qualities supplied by means of a subsurface drip irrigation system. Results evidenced that the model, despite some discrepancies locally observed, can fairly accurat…
Morphometric characterization of a calanchi inventory in Sicily, Italy
2015
Calanchi are a frequent type of badland landscape of Sicily (Italy), usually located in the middle of crops or forests. They are characterized by heavily dissected terrains with unvegetated slopes, knife ridge edges, V-shaped valleys and channels with a dendritic pattern, which incise and extend headwards. Calanchi exhibit, in smaller temporal and spatial scales, many of the geomorphic processes and landforms that may by observed in a fluvial landscape, hence, this type of badland may be considered as micro-watersheds where geomorphic dynamics can be related to their geometric features. The aim of this investigation was to evaluate the morphometric characteristics of calanchi landforms in S…
Ability of soil bacterial composition as an indicator of levels of soil erosion in a badland
2022
Calanchi (plural of calanco) are typical Italian badlands created by a combination of morphogenetic processes (rill and interrill erosion, gullying, piping, and mass movements) mainly originated by the effect of water. Calanchi are characterized by the sparse and patchy distribution of vegetation, and, in interplant areas, the soil surface is colonized by an association of organisms known as biological soil crust (BSC). A morphometric analysis of 45 basins in the studied calanchi area, based on a high-resolution digital elevation model, showed those basins are sediment removal systems characterized by rapid and relevant erosion processes. The goal of the current research is to evaluate the …
Assessing sediment connectivity in dendritic and parallel calanchi systems
2019
Abstract Calanchi, a type of Italian badlands created by a combination of water erosion processes and environmental constraints controlling their development, is a striking example of long-term landscape evolution. Sediment connectivity can be defined as the degree to which a system facilitates the fluxes of sediments through itself. The goal of this research is testing the use of simple morphometric variables for assessing sediment connectivity of calanchi landforms distinguishing between dendritic and parallel systems. For detecting the morphological characteristics controlling the sediment connectivity of calanchi basins, literature data (146 calanchi basins) and measurements carried out…
Metodo speditivo per il dimensionamento di ali gocciolanti in pendenza
2015
Metodo innovativo particolarmente semplice (solo due equazioni monomie) che consente di dimensionare ali gocciolanti comunque pendenti lungo i filari irrigui, massimizzando al tempo stesso il risparmio energetico (Baiamonte, 2018a). Il metodo pertanto sostituisce quello tradizionale basato su numerosi tentativi di calcolo di natura iterativa.
LIFE AForClimate: approcci predittivi per una selvicoltura del faggio in sintonia con il clima
2019
Numerosi studi hanno dimostrato che l’incremento delle temperature medie stagionali e le variazioni nel regime stagionale delle precipitazioni influenzano direttamente la variabilità di crescita dei popolamenti forestali. Conoscere la risposta delle foreste alla variabilità del clima è propedeutica a calibrare gli interventi selvicolturali per garantire minore stress alle piante e una migliore efficienza ecosistemica. Il progetto LIFE AForClimate (LIFE15 CCA/IT/000089 - Adaption of FORest management to CLIMATE variability: an ecological approach) mira a fornire soluzioni concrete per realizzare una gestione forestale efficace nell’adattamento ai cambiamenti climatici e definire un metodo pe…