Mapping fragility hotspots of a Mediterranean terraced system
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Transcript of Mapping fragility hotspots of a Mediterranean terraced system
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Davide RIZZO et al. – Sant’Anna Pisa – [email protected]
Mapping the fragility hotspots of a Mediterranean terraced systema landscape agronomy approach based on GIS multi-criteria analysis.
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Mapping the fragility hotspots of a Mediterranean terraced system
Davide Rizzo et al.Chiavari October 10, 2016
Davide
Sabine
Tiziana
Enrico
RIZZO landscape agronomist
GENNAI-SCHOTT geographer
SABBATINI geologist
BONARI agronomist
Mapping the fragility hotspots of a Mediterranean terraced systema landscape agronomy approach based on GIS multi-criteria analysis.
2
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Mapping the fragility hotspots of a Mediterranean terraced system
Davide Rizzo et al.Chiavari October 10, 2016
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Focus on managementPhD on terrace landscape management and function with research action approach
PhD on landscape agronomy mapping to identify management priorities
International research project (French ANR) to characterize periurbanagricultural systems and actors
Where are the different terraces?
Who is managing the terrace system?
http://bit.ly/MontemagnoStories
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Mapping the fragility hotspots of a Mediterranean terraced system
Davide Rizzo et al.Chiavari October 10, 2016
Introduction& aim
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Mapping the fragility hotspots of a Mediterranean terraced system
Davide Rizzo et al.Chiavari October 10, 2016
introduction and aim
Current management of Mediterranean terraced landscapes rises questions that go beyond the agricultural dynamics.
Numerous studies addressed so far various geographic locations though mainly with disciplinary approaches.
We need a shift towards a territorial perspective to cope with the post-productive context
5
Terraced landscapes: beyond sectorial approaches
Cf. introductory plenary by Sabina Asins-VelisOctober 7, 2016 in Venice
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Mapping the fragility hotspots of a Mediterranean terraced system
Davide Rizzo et al.Chiavari October 10, 2016
introduction and aim
6
Terrace systems are mainly in foothills
Varotto et al., 2016 MapTer early resultsTL3 plenary October 7, Venice
Terrace height average
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Mapping the fragility hotspots of a Mediterranean terraced system
Davide Rizzo et al.Chiavari October 10, 2016
introduction and aim
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Foothill periurbanisation in central Tuscanyh
ttp
://bit.
ly/IS
PRA
2015
Ispra, report n.218, 2015
Foothill areas in between Florence and Pisa farming systems are increasingly urbanized
So, local terrace systems are shifting toward neo-rurality and periurbanity: farming is just as part-time or hobby activity.
Ma
pTe
r2
01
6
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Mapping the fragility hotspots of a Mediterranean terraced system
Davide Rizzo et al.Chiavari October 10, 2016
introduction and aim
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What is abandonment (in periurban systems)?
These systems are concerned by either the complete abandonment of the farming system OR, with new management styles, may imply only a partialabandonment(just of terrace management).Monte Pisano (ITA) | Photo: Rizzo D
Importance of mapping terrace management practices
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Mapping the fragility hotspots of a Mediterranean terraced system
Davide Rizzo et al.Chiavari October 10, 2016
introduction and aim
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Informing & supporting new land managers
Observable current dynamics suggest that major challenges for conservation is to capitalize past knowledge to provide a reliable support for the new land managersMonte Pisano (ITA) | Photo: Rizzo D
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Mapping the fragility hotspots of a Mediterranean terraced system
Davide Rizzo et al.Chiavari October 10, 2016
introduction and aim
To develop territorial strategies to preserve the character of terrace systems we proposed a landscape agronomy approach.
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A landscape agronomy background
Benoît M, Rizzo D, et al. Landscapeagronomy: a new field for addressingagricultural landscape dynamics. Landscape Ecology 10 (2012)
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Mapping the fragility hotspots of a Mediterranean terraced system
Davide Rizzo et al.Chiavari October 10, 2016
introduction and aim
Discussing a spatially explicit method combining natural and anthropic landscape features related the expected terrace degradation dynamics (fragility).
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AIM of this talk
1. mapping terraces2. describe management3. prioritize management4. support management
Monte Pisano (ITA) | Photo: Rizzo D
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Mapping the fragility hotspots of a Mediterranean terraced system
Davide Rizzo et al.Chiavari October 10, 2016
The study1. mapping terraces2. describe management3. prioritize management4. support management
12
Monte Pisano (ITA) | Photo: Rizzo D
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Mapping the fragility hotspots of a Mediterranean terraced system
the study
Davide Rizzo et al.Chiavari October 10, 2016
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Terraces throughout the Mediterranean Main terraced systems below 1000m a.s.l.
Am
bro
ise
et a
l., 1
98
9;
Gro
vee
Rac
kham
, 20
00
; B
ran
cucc
iet
al.,
20
00
; P
into
-Co
rre
iae
Vo
s, 2
00
4; B
ald
esch
i et
al.,
20
05
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Mapping the fragility hotspots of a Mediterranean terraced system
the study
Davide Rizzo et al.Chiavari October 10, 2016
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A clear knowledge gap (ISPRA report, 2008)
plain
hill
mountain
Source: Landslides in Italy - Special Report 2008, ISPRA Original source: LPIS refresh di AGEA-SIN
Red dots: terracedfields
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Mapping the fragility hotspots of a Mediterranean terraced system
the study
Davide Rizzo et al.Chiavari October 10, 2016
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Terrace intensity (Agnoletti et al., 2015)
18 sample area with terrace intensityranging from 512 to 1,422 m/ha
The greatest part is cultivated with olive groves
“Given the historical and cultural significance of these agricultural landscapes, we need to expand our knowledge through an integrated and multidisciplinary approach.”
Territorial Analysis of the Agricultural Terraced Landscapesof Tuscany (Italy): Preliminary Results. Sustainability 7(2015)
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Mapping the fragility hotspots of a Mediterranean terraced system
the study
Davide Rizzo et al.Chiavari October 10, 2016
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Terrace per landscape unit (Rossi et al., 1994)
• Widespread in the Region (Apennine hills)
• 2 areas emerge: Monte Pisano (near Pisa) and Montalbano(near Vinci)
• Both with intensive olive grove production systems
Ratio on the total landscape unit area
http://bit.ly/ArsiaTer
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Mapping the fragility hotspots of a Mediterranean terraced system
the study
Davide Rizzo et al.Chiavari October 10, 2016
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Different techniques 1 (Region Tuscany)
Elaborated from the Piano di IndirizzoTerritoriale 2005-2010, Reg. Tuscany
Coexistenceof differenttechniques
http://bit.ly/ArsiaTer
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Mapping the fragility hotspots of a Mediterranean terraced system
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Davide Rizzo et al.Chiavari October 10, 2016
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Different techniques 2 (historical maps)
Best suited for local geology, pedology and morphology
http://bit.ly/ArsiaTer
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Mapping the fragility hotspots of a Mediterranean terraced system
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Study area: Monte Pisano (ITA, Tuscany)
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Mapping the fragility hotspots of a Mediterranean terraced system
the study
Davide Rizzo et al.Chiavari October 10, 2016
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Mapping for managing
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Mapping the fragility hotspots of a Mediterranean terraced system
Davide Rizzo et al.Chiavari October 10, 2016
The study1. mapping terrace2. describe management3. prioritize management4. support management
21
Monte Pisano (ITA) | Photo: F. Casella
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Mapping the fragility hotspots of a Mediterranean terraced system
the study
Davide Rizzo et al.Chiavari October 10, 2016
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Immediate issues: runoff & acessibilityhttp://bit.ly/MontemagnoRain
Photo: Fabio Casella
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Mapping the fragility hotspots of a Mediterranean terraced system
the study
Davide Rizzo et al.Chiavari October 10, 2016
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Where is the abandonment?
Monte Pisano (ITA) | Photo: Rizzo D
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Mapping the fragility hotspots of a Mediterranean terraced system
the study
Davide Rizzo et al.Chiavari October 10, 2016
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Altogether, a simple structure
To p h i l l w o o d s
M i d h i l l t e r r a c e s
F o o t h i l l v i l l a g e s
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Mapping the fragility hotspots of a Mediterranean terraced system
the study
Davide Rizzo et al.Chiavari October 10, 2016
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Terraces are part of a complex systemTotal monuntain: 160 Km2;
Study focus: 62 Km2
Ave slope37%
(>20% in >80% of the area)
Shallow soils
Ave rain: 1000÷1300 mm/yr
micro-topography is crucial
ave dry-stone wall density1,050m/ha
(max 2000m/ha)
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Mapping the fragility hotspots of a Mediterranean terraced system
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Dry-stone wall terraces
Caruso, 1883
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Mapping the fragility hotspots of a Mediterranean terraced system
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Davide Rizzo et al.Chiavari October 10, 2016
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Complex practice to manage soil & water
Figures: F. Casella & D. Rizzo
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Mapping the fragility hotspots of a Mediterranean terraced system
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Davide Rizzo et al.Chiavari October 10, 2016
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Dry-stone wall density
ave 1050m/ha
(max 2000m/ha)
1,813 ha of total agricultural surface
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Mapping the fragility hotspots of a Mediterranean terraced system
the study
Davide Rizzo et al.Chiavari October 10, 2016
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Different techniques / managementBest suited for localgeology, pedology and morphology
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Mapping the fragility hotspots of a Mediterranean terraced system
Davide Rizzo et al.Chiavari October 10, 2016
The study1. mapping terraces2. describe management3. prioritize management4. support management
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Mapping the fragility hotspots of a Mediterranean terraced system
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GIS-Multicriteria workflow
Rizzo et al. (in preparation) Evaluation and reliability of a GIS-based multicriteria assessment Mediterranean terraced system fragility
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Modeling preferences
Orientation
Elevation
Agro-pedology
Geomorphological risk
Terrace type
Terrace density
Land use and abandonment
Structural fragility
Agronomic parameters
Anthropic modifications
Total fragility
Management practices
Geomorphology
GOALS CRITERIA ATRIBUTES
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Mapping the fragility hotspots of a Mediterranean terraced system
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Davide Rizzo et al.Chiavari October 10, 2016
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Attribute classification (rasters 10x10m)
min maxGeomorphological risk
min. erodibilitymax. infiltration
max. erodibilitymin. infiltration
agro-pedology
high suitability for local crops low suitability for local cropsaltitude
high suitabilitymax. total evapotransp.
low suitability
min. total evapotransp.orientation
little morphological changesimple management
great morphological changeintensive management
Terrace type
low labour intensity, cultivated high labour intensity, abandonedLand use
Terrace density
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Structural fragilityRanked spatial alternatives responding to the initial decision problem, classed into four levels ranging from weak to strong,
i.e. where intensive management is required to mitigate/avoid expected degradation phenomena.
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Mapping the fragility hotspots of a Mediterranean terraced system
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Davide Rizzo et al.Chiavari October 10, 2016
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Total fragilityAccounting for actual agricultural management (i.e., cultivated versus abandoned olive groves) reduced fragility for >1/3 compared to structural fragility
35% improved
56% unchanged
9% worsen
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Mapping the fragility hotspots of a Mediterranean terraced system
the study
Davide Rizzo et al.Chiavari October 10, 2016
The field validation showed that the method proved reliable at identifying the extreme classes of fragility.
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Evaluating the GIS-MCA accuracy
KHAT measures accuracy removing random effect. It varies between 0 (completely random results) and 1 (perfect accuracy)
79.1%
76.8%
Producer accuracyProducer accuracy User accuracy Producer accuracy User accuracyStructural fragility Total fragility
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Mapping the fragility hotspots of a Mediterranean terraced system
Davide Rizzo et al.Chiavari October 10, 2016
The study1. mapping terraces2. describe management3. prioritize management4. support management
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Map provides context for management
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Evaluating terrace management costs
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Insight in production practices
0
0.5
1
1.5
2
2.5
0 200 400 600 800 1000
oil
(l)/
tree
number of trees
Olive oil per tree as function of nb of treemanaged per farmer
46%
43%
8%3%
Tree managed/ hobby farmer
up to200
up to 400
up to 1000
more than 1000
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Mapping the fragility hotspots of a Mediterranean terraced system
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Davide Rizzo et al.Chiavari October 10, 2016
Altogether, the various study outputs (maps, handbook, disseminations activities) are supporting local policy makers at prioritizing the use of monetary resources (e.g., public investments or targeted subsidies) ordinarily insufficient to cope with the huge need for the whole terraced system.
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Capitalizing knowledge
http://bit.ly/MP_Manuale
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Mapping the fragility hotspots of a Mediterranean terraced system
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Davide Rizzo et al.Chiavari October 10, 2016
ProgettiManuali (capitalizing knowledge)Cost evaluations (PIT Toscana)
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Disseminating management skills
Monte Pisano (ITA) | Photo: Rizzo D
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Mapping the fragility hotspots of a Mediterranean terraced system
Davide Rizzo et al.Chiavari October 10, 2016
Perspective& conclusion
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Monte Pisano (ITA) | Photo: Rizzo D
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Mapping the fragility hotspots of a Mediterranean terraced system
perspectives and conclusion
Davide Rizzo et al.Chiavari October 10, 2016
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Where do we go from here?
Remote sensing and multidisciplinary methods to fill the knowledge gap on terrace system structure
Interviews and participatory approaches to involve local experts and complement existing and available maps.
Formalization through handbook and maps to ease transmission and dissemination.
Involve the various land managers and raise awareness on the system perspective
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REF
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ReferencesAgnoletti M, Conti L, Frezza L, Santoro A (2015) TerritorialAnalysis of the Agricultural Terraced Landscapes of Tuscany(Italy): Preliminary Results. Sustainability 7:4564–4581. doi: 10.3390/su7044564
Congalton RG (1991) A review of assessing the accuracy of classifications of remotely sensed data. Remote Sensing of Environment 37:35–46. doi: 10.1016/0034-4257(91)90048-B
Gennai-Schott S, Rizzo D, Sabbatini T, Marraccini E (2014) Uno studio dell’intensità dei sistemi olivicoli collinari terrazzati: il caso del Monte Pisano. Atti del XLIII Convegno Nazionale della Società Italiana di Agronomia
Rizzo D, Galli M, Sabbatini T, Bonari E (2007) Terracedlandscapes characterization. Developing a methodology to map and analyze the agricultural management impacts(Monte Pisano, Italy). Revue Internationale de Géomatique17:431–447. doi: 10.3166/geo.17.431-447
Benoît M, Rizzo D, Marraccini E, et al. (2012) Landscapeagronomy: a new field for addressing agricultural landscapedynamics. Landscape Ecology 10:1385–1394. doi: 10.1007/s10980-012-9802-8
Galli M, Pieroni P, Brunori G (2003). Un’esperienza di ricerca partecipativa per la valorizzazione degli spazi rurali nel comprensorio del Monte Pisano, Genio Rurale LXVI(3):54–63.
Ambroise R., Frapa P., Giorgis S., 1989. Paysages de terrasses, Édisud, Aix-en-Provence.
Brancucci G., Ghersi A., Ruggiero M.E., 2000. Paesaggi liguri a terrazze: riflessioni per una metodologia di studio, Alinea Editrice, Firenze.
Baldeschi P. (a cura di), 2000. Il Chianti fiorentino un progetto di tutela del paesaggio, Laterza, Bari.
Baldeschi P. (a cura di), 2005. Il paesaggio agrario del Montalbano: identità sostenibilità società locale, PassigliEditore, Firenze.
Pinto-Correia T., Vos W., 2004. Multifunctionality in Mediterranean landscapes - past and future. In: R. Jongman(a cura di), The New Dimensions of European Landscape, UR Frontis Series 12, Wageningen, pp. 135–164.
Grove A.T., Rackham O., 2001. The Nature of Mediterranean Europe: an ecological history, Yale University Press, Oxford.
Rizzo D (2009) Landscape-agronomic analysis in the agro-environmental fragility assessment of a terraced landscape. PhD thesis, Scuola Superiore Sant’Anna
Galli M, Rizzo D, Casella F (2008) Il paesaggio terrazzato del Monte Pisano tra permanenza e mutamenti. ETS, Pisa (Italy)
Desplanches H., 1977. I paesaggi collinari tosco-umbro-marchigiani, in I paesaggi umani, TCI, Milano
Pedreschi L., 1963. I terrazzamenti agrari in Val di Serchio, Pubblicazioni dell’Istituto di Geografia dell’Università di Pisa, n. 10. Pisa, La Goliardica.
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Classe di fragilità somma1 2 3 4
strutturale
1 14,0 % 3,9 % 1,1 % - 18,9 %
2 1,8 % 3,6 % 1,8 % 0,1 % 7,3 %
3 1,2 % 5,9 % 21,5 % 6,7 % 35,3 %
4 - 0,9 % 13,5 % 24,1 % 38,5 %
somma 17,1 % 14,2 % 37,9 % 30,9 % 100 %
complessiva
1 15,5 % 3,6 % 1,1 % - 20,1 %
2 1,4 % 9,1 % 6,9 % 4,8 % 22,2 %
3 0,2 % 1,4 % 27,2 % 15,4 % 44,3 %
4 - 0,1 % 2,7 % 10,6 % 13,4 %
somma 17,1 % 14,2 % 37,9 % 30,9 % 100 %
Matrice di errore
introduzione caso di studio metodo risultati conclusioni
Accuratezza della mappatura :• dati corretti sulla diagonale• errori di stima (confronto per riga)
% sul totale della superficie rilevata
stim
ata
rilevata
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Mapping the fragility hotspots of a Mediterranean terraced system
Davide Rizzo et al.Chiavari October 10, 2016
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Cameo di Crozza all'interno dell'album "Cicciput" di Elio e le Storie Tese
Ciao, sono Maurizio Crozza, e voglio dirti una cosa.Ogni anno la Toscana è depredata della sua terra stessa.Ogni giorno un po' di Toscana muore.Forse per gli incendi? No no no no no.Forse per i saccheggi? No no no no no.Forse perché...? No no no no no.
La Toscana muore perché ogni giorno qualcuno porta via un sasso.
Se ognuno di noi portasse via un sasso, la Toscana si espanderebbe in tutto il mondo e nessuno potrebbe riconoscere più la Toscana, perché sarebbe ormai in tutto il mondo, quindi tutto il mondo si potrebbe chiamare Toscana, quindi la Toscana non esisterebbe più.Non portare via un sasso dalla Toscana, perché altrimenti non sappiamo più dov'è la Toscana.
https://youtu.be/Lp-HOfJfElk