Search results for "Forestal"

Pianificazione forestale territoriale ai fini della mitigazione del dissesto idrogeologico nel bacino del Fiume Imera Settentrionale (PA)

2013

I fenomeni di dissesto idrogeologico determinato dall’azione dei fattori naturali su superfici di diversa natura modificano profondamente il paesaggio. Alle cause di origine naturale si aggiungono le pressioni di natura antropica con effetti negativi nei riguardi del suolo aumentandone la suscettibilità al dissesto. L’obiettivo del presente lavoro è analizzare i dissesti in atto all’interno del bacino del Fiume Imera Settentrionale allo scopo di verificare la possibilità di mitigare tali fenomeni mediante l’adozione di una adeguata pianificazione di interventi forestali. L’indagine ha permesso di analizzare in ambiente GIS la distribuzione dei dissesti cartografati nell’ambito del Piano di …

Informazioni sull'attività agricola e zootecnica del territorio

2014

Vegetation dynamics within afforested coastal areas: regeneration by native species or invasion by alien species?

2017

During the last century, massive reforestation projects along the dunes of the southern Sicily have been carried out. Such interventions, far from being in line with the current trends of close-to-nature silviculture, are, however, particularly interesting to assess the vegetation dynamics in afforestation areas. Furthermore, these kind of interventions may determine two opposite effects, that is renaturalization by native woody species or invasion by alien species. Acacia spp. are among the most widespread and prominent invaders within Mediterranean-climate areas, where they have already shown the capability to deeply change the characters and the functioning of native ecosystems. For inst…

An Innovative Soil Bioengineering Technique by Waste Materials: The RiVite Project

2023

This paper describes the RiVite project granted by the Italian Ministry of Economic Development according to the JUMP (Joint Universities Program for PoC) program for patents enhancement, proposed by Sant’Anna School, Scuola Normale and the University of Palermo. The patent (Calvo, R., D’Asaro, F., Baiamonte, G.: Metodo per la realizzazione di un’opera costruttiva modulare per la protezione del territorio e detta opera. Attestato di Brevetto per Invenzione Industriale, n° 102,017,000,141,369, Ministero dello Sviluppo Economico, Roma, 27/02/2020.) consists of an advanced soil bioengineering work providing anti-erosion function, consolidating and stabilizing of slopes, thus for land protectio…

Influence of soil surface sealing and hydrophobicity on water infiltration

Nella tesi viene affrontato lo studio dell’impatto dei fenomeni di sealing superficiale e di idrofobicità sui processi di infiltrazione dell’acqua nel suolo. A tal fine vengono utilizzati diversi tipi di esperimenti infiltrometrici che consentono di determinare le modificazioni delle proprietà idrauliche del suolo indotte da questi due fenomeni permettendo di valutare così le loro ripercussioni negative sui processi idrologici. The thesis aims at investigating the effects of soil sealing and hydrophobicity on the water infiltration process. Different field infiltrometric techniques are applied at this end due to their ability to characterize modifications of soil hydraulic properties that d…

Effetti dell’uso di acque reflue urbane depurate sugli apparecchi erogatori

2005

Comparing two methods to perform a beerkan infiltration run in a loam soil at different dates

2023

<p>Performing beerkan infiltration runs with different heights of water pouring could help to obtain saturated soil sorptivity, <em>S</em>, and hydraulic conductivity, <em>K<sub>s</sub></em>, data usable to explain and simulate hydrological processes. However, most of the available information on the L (low height of water pouring, nearly 3 cm) - H (high height, 1-2 m) methodology refers to runs making use of a relatively limited number of water volumes and there is some sign that a few water volumes could yield an incomplete description of soil alteration phenomena induced by wetting. For a lo…

New technique for measuring water depth in rill channels

2019

Abstract Water erosion is one of the most important soil degradation processes and rill erosion contribution to total soil loss is usually dominant as compared to interrill erosion. Rill erosion modelling requires that rill flow has to be adequately modelled. Flow depths in rills are typically of the order of millimeters to several centimeters and bed topography, characterized by steep slope values, significantly affects flow hydraulics. In this paper, a new technique for measuring the water depth inside a rill channel is proposed and the effects on flow resistance estimate are examined. This technique couples an accurate ground survey of the rill channel, obtained by close-range photogramm…

New-stage discharge relationship for weirs of finite crest lenght

2014

AbstractThe flow process of weirs of finite crest length is analyzed on the basis of the dimensional analysis and incomplete self-similarity theory. The crest length is incorporated in the functional stage-discharge relationship for weirs of finite crest length. The theoretically deduced stage-discharge formula was then calibrated using the experimental data compiled in this research. According to the current experimental data it is also concluded that the performance of the proposed stage-discharge formula is better than the previous dimensional stage-discharge formulae. Also, the proposed stage-discharge formula is applicable for all types of the weirs, i.e., long-crested, broad-crested, …

Using Beerkan experiments to estimate hydraulic conductivity of a crusted loamy soil in a Mediterranean vineyard

2019

Abstract In bare soils of semi-arid areas, surface crusting is a rather common phenomenon due to the impact of raindrops. Water infiltration measurements under ponding conditions are becoming largely applied techniques for an approximate characterization of crusted soils. In this study, the impact of crusting on soil hydraulic conductivity was assessed in a Mediterranean vineyard (western Sicily, Italy) under conventional tillage. The BEST (Beerkan Estimation of Soil Transfer parameters) algorithm was applied to the infiltration data to obtain the hydraulic conductivity of crusted and uncrusted soils. Soil hydraulic conductivity was found to vary during the year and also spatially (i.e., ro…