Vegetation Management in São Paulo, Brazil · Luciana Schwandner Ferreira Faculty of Architecture...
Transcript of Vegetation Management in São Paulo, Brazil · Luciana Schwandner Ferreira Faculty of Architecture...
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Vegetation Management in São Paulo, Brazil
Clearing of urban vegetation and environmental compensation
Luciana Schwandner Ferreira
Faculty of Architecture and Urbanism, University of São Paulo, Brazil.
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Density and type
of leaves
Size of the tree
crown
Tree location
within the city
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EFFECTS ON MICROCLIMATE ARE LOCAL
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PLANTING
IRRIGATION
PRUNING
STORM DAMAGES
WINTER THERMAL
DISCOMFORT
SAFETY
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1.530 Km² 11 MILLION PEOPLE
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METROPOLITAN AREA 38 CITIES 20 MILLION PEOPLE
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RAINFOREST
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NATURAL OPEN FIELDS
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WEATLANDS
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1554
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1960
Imag
e f
rom
: Nel
son
Co
elh
o
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2010
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2010
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Imag
e f
rom
Jo
rge
Ferr
reir
a
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“It is most disconcerting to conclude that not only
does uncontrolled growth fail to recognize
intrinsic suitabilities and unsuitabilities for urban
growth, but that the formal planning process is
almost as culpable” (McHarg, 1992)
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31% of existing vegetation
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Natural barriers
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Natural barriers ?
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Natural?
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Simplification + Sizeable reduction of the urban forest
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48 laws
Through a complex offset process
All tree suppression must be compensated
To protect vegetation and regulate its management
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48 laws MOST DEFORESTATION IS ILLEGAL
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48 laws INTENSE PUBLIC & SOCIAL CONTROL
NOT STRUCTURED / EQUIPPED
48 laws
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OFFICIAL VEGETATION MANAGEMENT
48 laws
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48 laws
Federal State Municipal
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48 laws
Procedures for vegetation clearance
Punishments for unauthorized clearance
Benefits for preservation
Compensation
Planting of trees
5 cm trunk diameter
Supplying tree seedlings to the Municipal Tree Nursery
Conversion into monetary values EXCEPCIONALLY
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Calculating compensation
CF = (A+B+C+D+E+M) x FR1 X FR3
A = {[(Ite x Te) +(Ice x Ce)] x 50%} + {[(Itn x Tn) + (Icn X Cn)] x Fm}
C = [(Ite x Tex) + (Icex x Cex)] x Fm
VCF = CF x V
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Calculating compensation parameters
* Trunk diameter
trunk = 5-10 cm
trunk > 150 cm
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* Trunk diameter
* Location
Preserved areas
Heritage areas
Other location
Calculating compensation parameters
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* Trunk diameter
* Location
* Type of tree
Invasive, exotic
Species protected by law
Endangered species
X1
X 10
X 5
Calculating compensation parameters
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* Trunk diameter
* Location
* Type of tree
* Grouping
Isolated tree
Forest fragments < 1000m²
Forest fragments > 1000m²
X1
X 3
X 4
Calculating compensation parameters
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Considerations
* Not possible to identify theoretical foundation
of the proportion: suppressed X planted
* Just trees and palm trees. No herbaceous and
shrubs
* Wildlife
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* Compensation doesn’t consider the amount
of existing vegetation
* No concerns about the form of preserved
fragment / planting area
* Despite all formulas, trees protected by law
can be removed
Considerations
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Converting into monetary values
NUMBER OF TREES TO BE PLANTED
x
COST TO PLANT A TREE
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VALUE OF
COMPENSATION
NUMBER OF TREES TO BE PLANTED
x
COST TO PLANT A TREE
(£ 62,46) Environmental Agency’s value
=
Converting into monetary values
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13.454 tree cutting
0
200
400
600
800
1000
1200
1400
1
3
5
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11
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Tree
cu
ttin
g/k
m²
Districts
18.55%
81.45%
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0
500
1000
1500
2000
2500
3000
1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011
Tre
e c
utt
ing
Year
Tree cutting between 1997 - 2011
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1999
2,805 - trees suppressed
102 - trees transplanted
2,686 - planting in site
100 - planting in streets
31,403 - seedling to municipal Nursery
2,907
34,192
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2009
2,826 - trees suppressed
373 - trees transplanted
2,398 - planting in site
360 - planting in streets
3,967 - seedling to municipal Nursery
30,354 - trees converted
3,199
37,079
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2009
30,354 - trees converted into public works
31%
3%
8%
7% 5%
20%
26%
Pq. Natural da Cratera e Pq. Horto do Ipê
Pq. Sto Dias
Pq. Linear Diniz
Pq. Altos da Baronesa
Pq. Linear Itatapaiuna
Pq. Guarapiranga
Pq. Horto do Ipê
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IS THE
ENVIRONMETAL
COMPENSATION
JUST ANOTHER
FEE TO BE PAID ?
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Concluding Remarks
Costs and benefits of urban forest are not being considered in its totality
The incorporation of natural processes in decision making remains to be established
It is necessary to establish better parameters for the conversion of trees to be planted into monetary values
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Concluding Remarks
Increasing restrictions on tree removal and increasing the value of environmental compensation, decoupled from other measures, do not guarantee the preservation of vegetation
It seem not possible to establish an environmental compensation for an environmental damage not well defined
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Image Reference
Page 2. http://juliapetit.com.br/ Page 3. http://www.ecourbana.wordpress.com Page 4. http://www.navegadormt.com Page 8. http://www.mectree.com.br Page 9. http://envolverde.com.br Page 15. http://historiadesaopaulo.wordpress.com Page 16. http://vejasp.abril.com.br Page 22. http://www.ibamendes.com Page 23. http://www.vilamundo.org.br Page 24. http://noticias.r7.com Page 25. http://arvoresdesaopaulo.wordpress.com