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Starting from the experiences carried out by other cities, the Municipality of
Modena decided to create a new calculation methodology, to be tested in the redevelopment of the Village.
Several municipalities are already equipped with calculation methodologies, in
order to highlight the environmental performance achieved by the redevelopment of
urban lots.
These calculation methodologies, also known as “urban indexes”, are mainly
focused on the urban impact created by the analysed phenomena, and are usually
characterized by a simple algorithm.
The main existing urban indexes are the BAF, “Biotope Area Factor”, used in
Berlin, Malmo and Seattle, and the RIE, “Reduction of the Building’s Impact”, used
in Bolzano and Bologna.
Both indexes calculate the ecological value of an urban lot.
Unfortunately, these indexes have limitations which make their application to
“Villaggio Artigiano” impossible.
The Biotope Area Factor considers only the “green” surfaces and is therefore not
suitable to assess the positive effect of a “cold roof”.
The index of Reduction of the Building’s Impact considers only the horizontal
surfaces and is therefore not suitable to assess the positive effect of a “green” wall.
The main goal of Modena Municipality was to create a calculation methodology
capable to:
– analyse all the surfaces that make up the urban lot, like the courtyard areas, building walls and roof,
– analyse different types of surfaces, like green or cool surfaces,
– stand up to existing indexes in terms of simplicity of data input,
– make appropriate approximations, like urban indexes typically do,
– highlight the environmental performance on the basis of indicators that predict
physical tangible phenomena,
– implement procedures and values already defined by laws or municipal
regulations.
The three main environmental issues (reduction of the Urban Heat Island, reduction of energy consumption, reduction of the hydraulic risk) have been linked to two
indicators that have been used to derive two indices, the index “RATE” of “reduction in the absorption of thermal energy” and the index “HYPER” of “reduction of
hydraulic risk”.
The creation of the index “RATE” followed four stages:
1. a list of types of surfaces that include the typical materials of the existing context
and the materials used today in new projects.
Altogether 20 types of surfaces has been identified: 7 for the courtyard areas,
6 for the walls and 7 for the roofs. Some of these describe existing interventions,
typical of the existing context, while others describe innovative interventions of
recent use. The interventions that can be implemented in the courtyard areas are:
garden or flower bed, tree or shrub, self-locking pavement, lawn driveway, “cold”
asphalt, normal asphalt, gravel pavement.
S. Zauli Sajani et al.
Starting from the experiences carried out by other cities, the Municipality of
Modena decided to create a new calculation methodology, to be tested in the redevelopment of the Village.
Several municipalities are already equipped with calculation methodologies, in
order to highlight the environmental performance achieved by the redevelopment of
urban lots.
These calculation methodologies, also known as “urban indexes”, are mainly
focused on the urban impact created by the analysed phenomena, and are usually
characterized by a simple algorithm.
The main existing urban indexes are the BAF, “Biotope Area Factor”, used in
Berlin, Malmo and Seattle, and the RIE, “Reduction of the Building’s Impact”, used
in Bolzano and Bologna.
Both indexes calculate the ecological value of an urban lot.
Unfortunately, these indexes have limitations which make their application to
“Villaggio Artigiano” impossible.
The Biotope Area Factor considers only the “green” surfaces and is therefore not
suitable to assess the positive effect of a “cold roof”.
The index of Reduction of the Building’s Impact considers only the horizontal
surfaces and is therefore not suitable to assess the positive effect of a “green” wall.
The main goal of Modena Municipality was to create a calculation methodology
capable to:
– analyse all the surfaces that make up the urban lot, like the courtyard areas, building walls and roof,
– analyse different types of surfaces, like green or cool surfaces,
– stand up to existing indexes in terms of simplicity of data input,
– make appropriate approximations, like urban indexes typically do,
– highlight the environmental performance on the basis of indicators that predict
physical tangible phenomena,
– implement procedures and values already defined by laws or municipal
regulations.
The three main environmental issues (reduction of the Urban Heat Island, reduction of energy consumption, reduction of the hydraulic risk) have been linked to two
indicators that have been used to derive two indices, the index “RATE” of “reduction in the absorption of thermal energy” and the index “HYPER” of “reduction of
hydraulic risk”.
The creation of the index “RATE” followed four stages:
1. a list of types of surfaces that include the typical materials of the existing context
and the materials used today in new projects.
Altogether 20 types of surfaces has been identified: 7 for the courtyard areas,
6 for the walls and 7 for the roofs. Some of these describe existing interventions,
typical of the existing context, while others describe innovative interventions of
recent use. The interventions that can be implemented in the courtyard areas are:
garden or flower bed, tree or shrub, self-locking pavement, lawn driveway, “cold”
asphalt, normal asphalt, gravel pavement.
S. Zauli Sajani et al.