1,720,989 research outputs found
Metodologia speditiva finalizzata alla classificazione dei tipi d'uso del suolo su area vasta a vocazione forestale
No full textPhosphorus lake loads from basin land use: proposal for a new simple evaluation method ,
No full textProgettazione di una scala di risalita per pesci nella riserva naturale di Tuscania (alto Lazio)
No full text
Evaluation of eCognition Developer and Orfeo ToolBox Performances for Segmenting Agrophotovoltaic Systems from Sentinel-2 Images
No full textA deep energy transformation will be tried out across the globe in the next decades in order to detect potential green and renewable sources able to replace fossil fuels. Among the various alternatives, photovoltaic technology, recognized as sustainable, clean, and environmentally friendly essence, is considered one of the most relevant solutions. To date, the Remotely Piloted Aircraft System has been largely used to inspect solar parks albeit the treatment of very high-resolution satellite images through object-based models may be a valid option. In this work, the potentialities of two segmentation approaches (multi-resolution and mean-shift algorithms, implemented in eCognition Developer and Orfeo Toolbox software, respectively) in extracting photovoltaic panels from Sentinel-2 time series were explored and compared. Such techniques were tested in Montalto di Castro in Viterbo (Italy). Multi-resolution algorithm was applied by varying scale and shape parameters between 20 and 100 and 0.1 and 0.5, respectively. Conversely, the mean-shift approach was used by considering the default values of spatial radius and range radius. Their segmentation outcomes were compared on the base of i) minimum Euclidean Distance 2 (ED2), calculated in AssesSeg environment, ii) segmentation polygons statistics and areas value, and, lastly, iii) their performance in terms of processing time, versatility, ability of handling heavy data, and cost. ECognition Developer demonstrated a better performance in segmenting Sentinel 2-images for extracting PV systems in terms of segmentation parameters management and outcomes interpretation ability
Perception and landscape identity: A development opportunity for rural areas
No full texttTraditional farming systems and other activities such as craftsmanship (e.g. manufacturing activities,local food production), represent a sustainable example of human integration with nature. Their main-tenance and development, with opportune adaptations to the current socio-economic situation andcultural/technological advancements, are therefore valuable. Under the new Common Agricultural Policy(CAP), preference will be given to projects with a participative approach presented for funding coveredby the Common Strategic Framework 2014–2020 programming. The challenge is to integrate participa-tory planning, people’s attitude to traditional work with the European strategy for rural development.LEADER actions are an effective tool suitable for the implementation of such local development policies.In this paper, a ground-breaking attitude model to traditional activities has been developed. A question-naire was compiled on the basis of current literature on attitude models and distributed to the communityof a rural area in Central Italy (six municipalities). The data gathered were statistically analysed by struc-tural equation modelling (SEM). The results obtained allow several factors influencing attitude to beidentified as well as highlighting the difference in the responses of farmers and artisans compared withthose of the rest of the community.In addition, several strategies (leverage points) have been defined for an efficient rural developmentof the study area in line with peoples’ perception. Such strategies would be capable of strengtheningresidents’ sense of place and transforming the local community into a more resilient and adaptivesocio-ecological system, capable in turn of ensuring and preserving the ecosystem services provided.Specifically, all the suggested actions aim to increase cohesion among citizens and institutions, tostrengthen the sense of community and to promote the creation of local networks, an essential pre-requisite to the setting up of Local Action Groups, as programmed by the European Strategy for RuralDevelopment.The novelty of the work lies in the use of SEM for the definition of leverage points, following Meadows’classification proposed within systems theory (Meadows, 2009).This paper, by focusing on local traditional activities as a leverage point, puts forward recommendationsfor planners and policy makers, and opens a different perspective on today’s increased need for ruralre-development and social innovation
Best management practices for phosphorus control in the Lake Vico basin (Central Italy): spatial allocation and effectiveness evaluation
No full textInviato a “Journal of Environmental Management”
Phosphorus lake loads from basin land use: proposal for a new simple evaluation method ,
No full textPhosphorus export from agricultural land: a simple approach
No full textIn the last few decades, increased inputs of nutrients (mostly nitrogen and phosphorus) to
agricultural land have led to runoff transporting an ever growing portion of these nutrients
from non-point (diffuse) pollution sources into rivers and lakes, thus threatening freshwater
quality.
Phosphorus (P), the focus of the present paper, is principally transported from agricultural
land bound to sediments and can accelerate freshwater eutrophication. Two fundamental
problems face land managers when dealing with the problem of non-point P pollution. The
first is posed by the quantitative evaluation of P loads at basin scale, which is essential in
assessing areas of higher export risk and transport pathways. The second is finding
a satisfactory compromise between two opposing needs: simplicity, to satisfy management,
and complexity, to interpret real processes and their related uncertainty. Uncertainty
is not merely the uncertainty that is intrinsic to model simulations, but also that
deriving from the inherent stochastic variability of real systems.
In the present study, an attempt to maximise the advantages of both approaches was
made. The Lake Vico basin, Central Italy, was selected as a suitable site, since the P
concentration of the lake increased dramatically at the beginning of the 1990s, due to P
non-point pollution source loads.
The simulation model (Groundwater Leaching Effects of Agricultural Management
Systems, GLEAMS) was used to evaluate field scale P losses in two different scenarios:
conventional and conservative agricultural practices. A regression model for each of these
two scenarios was then fitted, to find the best relation between slope, on the one hand, and
P losses. This regression allowed the GLEAMS results to be extended to basin scale, by
a digital terrain model and a geographic information system (GIS), making it possible to
evaluate P export into the lake, thus meeting management needs. The accuracy of this type
of approach was evaluated by comparing model predictions with monitored results of P
concentration in water.
The suggested approach offers solutions to several problems regarding land management
sustainability, including: (i) a quantitative evaluation of different land management
scenarios; (ii) the possibility of zoning landscape according to risk level, comparing different scenarios and related environmental efficiency; (iii) an integrated evaluation of
land cover, in terms of its impact on freshwater ecological status and the long-term water
body condition, as a consequence of land use
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