IUAV Corso di perfezionamento in tutela e gestione del suolo e delle acque Venezia 13 Aprile 2012 The Environmental Impact assessment in the urban planning: the.
Download ReportTranscript IUAV Corso di perfezionamento in tutela e gestione del suolo e delle acque Venezia 13 Aprile 2012 The Environmental Impact assessment in the urban planning: the.
Slide 1
IUAV Corso di perfezionamento in tutela e
gestione del suolo e delle acque
Venezia 13 Aprile 2012
The Environmental Impact
assessment in the urban
planning:
the prevention of the hydraulic hazard,
the Hydraulic Compatibility Assessment
Ing. Alessandro Pattaro
www.ideaingegneria.com
Slide 2
Development plan presentation
1
The Hydraulic Compatibility Assessment
in Veneto
2
Hydraulic Compatibility Assessment of Meolo’s
PAT
3
Hydraulic Compatibility Assessment of
Maserada’s PAT
www.ideaingegneria.com
Slide 3
1
The Hydraulic Compatibility
Assessment
in Veneto
(VCI di PAT, PI, Piani attuativi)
www.ideaingegneria.com
Slide 4
Legal context of the Hydraulic Compatibility
Through the DGRV 3637/02 the Veneto Region requires that
the planning is subjected to Hydraulic compatibility
assessment.
Article 3, LR 11/2004 Rules for the Government of the territory
(known as new urbanism law)
4. The planning includes:
a) plan land use district (PAT), plan of action by
municipalities (IP), implementing urban development plans
(PUA);
b) Provincial Territorial Coordination Plan (PTCP);
www.ideaingegneria.com
Slide 5
Objectives of the Hydraulic Compatibility
The adoption of new planning projects is subjected to
compliance with the opinion expressed by the competent
hydraulic authorities, identified by the Veneto Region in the
unit of the Regional Civil Engineers.
The VCI hydraulic calculations aim to define the design
interventions that have compensatory function to ensure the
“hydraulic invariance”.
The principle of invariance is defined: hydraulic invariance
means that the transformation of an area does not cause a
worsening of the discharge of the river receiving the runoff
originated from the same.
www.ideaingegneria.com
Slide 6
Goals of the Hydraulic Compatibility
The fundamental purpose of the study is to support
compatibility hydraulic evaluation, from the stage of
conception:
• to ascertain the suitability of sites to accommodate the
new building;
• to consider the interference of the new settlements with
present and potential hydraulic disruptions;
• to determine possible changes in the hydraulic system
caused by new locations or changes of land use.
In summary: the hydraulic study aims to verify the eligibility of
the provisions contained in the planning projects, suggesting
good solutions in terms of good managment of the territory.
www.ideaingegneria.com
Slide 7
Scheme of the Hydraulic Compatibility
1 – Collection and analysis of data
2 – Analysis of precipitation
3 – waterproofing evaluation in areas of urban expansion
4 – Application of a hydrological model (comparison between
different methods)
Hydrological assessment
of flow outgoing from
the basin study
Parameters suggested
from the local
managment authority
5 – Comparison of scenarios and evaluation of prevention,
containment and mitigation of hydraulic risk
www.ideaingegneria.com
Slide 8
2
Hydraulic Compatibility
Assessment
Meolo’s PAT
www.ideaingegneria.com
Slide 9
First case: the Compatibility Hydraulic
Assessment of Meolo’s PAT
Customer: Tepco srl
Project: Valutazione di Compatibilità Idraulica del PAT del
Comune di Meolo (VE)
www.ideaingegneria.com
Slide 10
Geographical context
Monastier di TV
Roncade
F. Piave
Musile di P.
F. Sile
www.ideaingegneria.com
Slide 11
Geographical context
www.ideaingegneria.com
Slide 12
The areas potentially transformable
www.ideaingegneria.com
Slide 13
The Piave ‘s PAI constraints, hazard mapping
www.ideaingegneria.com
Slide 14
The Sile ‘s PAI constraints, hazard mapping
www.ideaingegneria.com
Slide 15
The mathematical modeling 1d - 2d
The calculation
grid
www.ideaingegneria.com
Slide 16
The flooding simulation in Meolo
www.ideaingegneria.com
Slide 17
The new hydraulic hazard map
www.ideaingegneria.com
Slide 18
The hydraulic assessment
N
W
E
Before urbanization
S
_EDIFICIO
_PAVIM ENTAZIONI
_VERDE
90
0
90
1 8 0 M et ers
_EDIFICIO
_PAVIMENTAZIONI
_VERDE
After the
waterproofing
N
E
W
S
90
0
90
1 8 0 M et ers
www.ideaingegneria.com
Slide 19
Which effects does the waterproofing area
cause on the existing hydraulic system?
www.ideaingegneria.com
Slide 20
Which effects does the waterproofing area
cause on the existing hydraulic system?
Valutazione del volume di compensazione
0.14
0.12
portata [m³/s]
0.10
portata prima
dell'urbanizzazione
0.08
0.06
0.04
0.02
0.00
0
1
2
3
4
5
6
7
8
Tempo [h]
www.ideaingegneria.com
Slide 21
The surface runoff increases and the stream
becomes faster
Valutazione del volume di compensazione
0.14
0.12
portata prima
dell'urbanizzazione
portata dopo
l'urbanizzazione
portata [m³/s]
0.10
0.08
0.06
0.04
0.02
0.00
0
1
2
3
4
5
6
7
8
Tempo [h]
www.ideaingegneria.com
Slide 22
The surface runoff increases and the stream
becomes faster
Valutazione del volume di compensazione
0.14
To ensure the
hydraulic
invariance is
necessary to
create a
compensation
0.12
portata [m³/s]
0.10
0.08
0.06
portata prima
dell'urbanizzazione
portata dopo
l'urbanizzazione
0.04
0.02
0.00
0
1
2
3
4
5
6
7
8
Tempo [h]
www.ideaingegneria.com
Slide 23
How to achive the mitigation
and compensation measures
www.ideaingegneria.com
Slide 24
How to achive the mitigation
and compensation measures
1 – to insert a reducing flow
device in the upstream
section ahead the final
delivery
www.ideaingegneria.com
Slide 25
How to achive the mitigation
and compensation measures
1 – to insert a reducing flow
device in the upstream
section ahead the final
delivery (ditch, river)
2 – to achieve a
compensation upstream
volume
www.ideaingegneria.com
Slide 26
How to connect the
hydraulic network to
final delivery (ditch,
river)
www.ideaingegneria.com
Slide 27
How to design the reducing discharge device
www.ideaingegneria.com
Slide 28
VCI conclusions
The Hydraulic Compatibility Assessment ends with the
requirements that are incorporated in the Technical Rules of
PAT
Constraints, requirements and guidelines prescribe the
necessary measures to ensure the hydraulic invariance of
the urban development
www.ideaingegneria.com
Slide 29
3
Hydraulic Compatibility
Assessment
Maserada’s PAT
www.ideaingegneria.com
Slide 30
Second case: the Compatibility Hydraulic
Assessment of Maserada’s PAT
Customer : Comune di Maserada sul Piave
Project : Valutazione di Compatibilità Idraulica del PAT del
Comune di Maserada sul Piave (TV)
www.ideaingegneria.com
Slide 31
Geographical context
Cimadolmo
LEGENDA
Idrografi ca pri nci pale
Argine S. M arco
Conf ini Com unal i
Spresiano
F. Piave
Villorba
3
Breda di Piave
0
3
N
W
E
6 Kilom et ers
S
www.ideaingegneria.com
Slide 32
The Piave ‘s PAI constraints, hazard mapping
Conf ini am m inistrat ivi
N
W
E
S
Peric olosità idrauli ca PAI Piave
F
P1
P2
P3
www.ideaingegneria.com
Slide 33
The soil permeability (hydraulic conductivity)
LEGENDA - Perm eabi li tà
Bassa (Argil la)
Elevata (Ghi ai a)
Media (Sabbi a)
N
E
W
S
3
0
3
6 Kilom et ers
www.ideaingegneria.com
Slide 34
The groundwater depth
LEGEN DA - Prof ondi tà falda freat ica
0 -2 m
2 -5 m
5 -1 0 m
Lim ite fascia risorgive
N
E
W
S
2
0
2
4 Kilom et ers
www.ideaingegneria.com
Slide 35
Hydraulic runoff through infiltration device
www.ideaingegneria.com
IUAV Corso di perfezionamento in tutela e
gestione del suolo e delle acque
Venezia 13 Aprile 2012
The Environmental Impact
assessment in the urban
planning:
the prevention of the hydraulic hazard,
the Hydraulic Compatibility Assessment
Ing. Alessandro Pattaro
www.ideaingegneria.com
Slide 2
Development plan presentation
1
The Hydraulic Compatibility Assessment
in Veneto
2
Hydraulic Compatibility Assessment of Meolo’s
PAT
3
Hydraulic Compatibility Assessment of
Maserada’s PAT
www.ideaingegneria.com
Slide 3
1
The Hydraulic Compatibility
Assessment
in Veneto
(VCI di PAT, PI, Piani attuativi)
www.ideaingegneria.com
Slide 4
Legal context of the Hydraulic Compatibility
Through the DGRV 3637/02 the Veneto Region requires that
the planning is subjected to Hydraulic compatibility
assessment.
Article 3, LR 11/2004 Rules for the Government of the territory
(known as new urbanism law)
4. The planning includes:
a) plan land use district (PAT), plan of action by
municipalities (IP), implementing urban development plans
(PUA);
b) Provincial Territorial Coordination Plan (PTCP);
www.ideaingegneria.com
Slide 5
Objectives of the Hydraulic Compatibility
The adoption of new planning projects is subjected to
compliance with the opinion expressed by the competent
hydraulic authorities, identified by the Veneto Region in the
unit of the Regional Civil Engineers.
The VCI hydraulic calculations aim to define the design
interventions that have compensatory function to ensure the
“hydraulic invariance”.
The principle of invariance is defined: hydraulic invariance
means that the transformation of an area does not cause a
worsening of the discharge of the river receiving the runoff
originated from the same.
www.ideaingegneria.com
Slide 6
Goals of the Hydraulic Compatibility
The fundamental purpose of the study is to support
compatibility hydraulic evaluation, from the stage of
conception:
• to ascertain the suitability of sites to accommodate the
new building;
• to consider the interference of the new settlements with
present and potential hydraulic disruptions;
• to determine possible changes in the hydraulic system
caused by new locations or changes of land use.
In summary: the hydraulic study aims to verify the eligibility of
the provisions contained in the planning projects, suggesting
good solutions in terms of good managment of the territory.
www.ideaingegneria.com
Slide 7
Scheme of the Hydraulic Compatibility
1 – Collection and analysis of data
2 – Analysis of precipitation
3 – waterproofing evaluation in areas of urban expansion
4 – Application of a hydrological model (comparison between
different methods)
Hydrological assessment
of flow outgoing from
the basin study
Parameters suggested
from the local
managment authority
5 – Comparison of scenarios and evaluation of prevention,
containment and mitigation of hydraulic risk
www.ideaingegneria.com
Slide 8
2
Hydraulic Compatibility
Assessment
Meolo’s PAT
www.ideaingegneria.com
Slide 9
First case: the Compatibility Hydraulic
Assessment of Meolo’s PAT
Customer: Tepco srl
Project: Valutazione di Compatibilità Idraulica del PAT del
Comune di Meolo (VE)
www.ideaingegneria.com
Slide 10
Geographical context
Monastier di TV
Roncade
F. Piave
Musile di P.
F. Sile
www.ideaingegneria.com
Slide 11
Geographical context
www.ideaingegneria.com
Slide 12
The areas potentially transformable
www.ideaingegneria.com
Slide 13
The Piave ‘s PAI constraints, hazard mapping
www.ideaingegneria.com
Slide 14
The Sile ‘s PAI constraints, hazard mapping
www.ideaingegneria.com
Slide 15
The mathematical modeling 1d - 2d
The calculation
grid
www.ideaingegneria.com
Slide 16
The flooding simulation in Meolo
www.ideaingegneria.com
Slide 17
The new hydraulic hazard map
www.ideaingegneria.com
Slide 18
The hydraulic assessment
N
W
E
Before urbanization
S
_EDIFICIO
_PAVIM ENTAZIONI
_VERDE
90
0
90
1 8 0 M et ers
_EDIFICIO
_PAVIMENTAZIONI
_VERDE
After the
waterproofing
N
E
W
S
90
0
90
1 8 0 M et ers
www.ideaingegneria.com
Slide 19
Which effects does the waterproofing area
cause on the existing hydraulic system?
www.ideaingegneria.com
Slide 20
Which effects does the waterproofing area
cause on the existing hydraulic system?
Valutazione del volume di compensazione
0.14
0.12
portata [m³/s]
0.10
portata prima
dell'urbanizzazione
0.08
0.06
0.04
0.02
0.00
0
1
2
3
4
5
6
7
8
Tempo [h]
www.ideaingegneria.com
Slide 21
The surface runoff increases and the stream
becomes faster
Valutazione del volume di compensazione
0.14
0.12
portata prima
dell'urbanizzazione
portata dopo
l'urbanizzazione
portata [m³/s]
0.10
0.08
0.06
0.04
0.02
0.00
0
1
2
3
4
5
6
7
8
Tempo [h]
www.ideaingegneria.com
Slide 22
The surface runoff increases and the stream
becomes faster
Valutazione del volume di compensazione
0.14
To ensure the
hydraulic
invariance is
necessary to
create a
compensation
0.12
portata [m³/s]
0.10
0.08
0.06
portata prima
dell'urbanizzazione
portata dopo
l'urbanizzazione
0.04
0.02
0.00
0
1
2
3
4
5
6
7
8
Tempo [h]
www.ideaingegneria.com
Slide 23
How to achive the mitigation
and compensation measures
www.ideaingegneria.com
Slide 24
How to achive the mitigation
and compensation measures
1 – to insert a reducing flow
device in the upstream
section ahead the final
delivery
www.ideaingegneria.com
Slide 25
How to achive the mitigation
and compensation measures
1 – to insert a reducing flow
device in the upstream
section ahead the final
delivery (ditch, river)
2 – to achieve a
compensation upstream
volume
www.ideaingegneria.com
Slide 26
How to connect the
hydraulic network to
final delivery (ditch,
river)
www.ideaingegneria.com
Slide 27
How to design the reducing discharge device
www.ideaingegneria.com
Slide 28
VCI conclusions
The Hydraulic Compatibility Assessment ends with the
requirements that are incorporated in the Technical Rules of
PAT
Constraints, requirements and guidelines prescribe the
necessary measures to ensure the hydraulic invariance of
the urban development
www.ideaingegneria.com
Slide 29
3
Hydraulic Compatibility
Assessment
Maserada’s PAT
www.ideaingegneria.com
Slide 30
Second case: the Compatibility Hydraulic
Assessment of Maserada’s PAT
Customer : Comune di Maserada sul Piave
Project : Valutazione di Compatibilità Idraulica del PAT del
Comune di Maserada sul Piave (TV)
www.ideaingegneria.com
Slide 31
Geographical context
Cimadolmo
LEGENDA
Idrografi ca pri nci pale
Argine S. M arco
Conf ini Com unal i
Spresiano
F. Piave
Villorba
3
Breda di Piave
0
3
N
W
E
6 Kilom et ers
S
www.ideaingegneria.com
Slide 32
The Piave ‘s PAI constraints, hazard mapping
Conf ini am m inistrat ivi
N
W
E
S
Peric olosità idrauli ca PAI Piave
F
P1
P2
P3
www.ideaingegneria.com
Slide 33
The soil permeability (hydraulic conductivity)
LEGENDA - Perm eabi li tà
Bassa (Argil la)
Elevata (Ghi ai a)
Media (Sabbi a)
N
E
W
S
3
0
3
6 Kilom et ers
www.ideaingegneria.com
Slide 34
The groundwater depth
LEGEN DA - Prof ondi tà falda freat ica
0 -2 m
2 -5 m
5 -1 0 m
Lim ite fascia risorgive
N
E
W
S
2
0
2
4 Kilom et ers
www.ideaingegneria.com
Slide 35
Hydraulic runoff through infiltration device
www.ideaingegneria.com