Welcome to the ECOCITY 2022 Interactive Programme

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Displaying One Session

Session Type
Academic Sessions
Date
02/24/2022
Session Time
04:00 PM - 05:20 PM
Room

Hall A

DESIGNING FOR BIODIVERSITY - CONCEPTUALIZATION OF A SUSTAINABLE BUILDING ENVELOPE OF A SINGLE-FAMILY HOUSE IN SWITZERLAND

Session Type
Academic Sessions
Date
02/24/2022
Session Time
04:00 PM - 05:20 PM
Room

Hall A

Lecture Time
04:00 PM - 04:10 PM

Abstract

Abstract Body

In cities and settlement areas, the promotion of biodiversity is gaining importance because, on the one hand, biodiversity is dwindling due to intensive agriculture and the loss of habitats; on the other hand, cities offer a variety of microclimates and niches for habitats (plant communities) and animals, which can be promoted through sustainable planning. The aim of this paper is to develop a feasible concept for a building envelope to promote biodiversity taking into account the surrounding habitats while addressing the specific needs of target species. To do so, it was necessary to conceptualize a framework merging vision and competences of architects and environmental engineers. The study case is a family house in Gattikon (Zurich, Switzerland), belonging to the Swiss architectural office VBAU and subjected to renovation.

The first step was to run a site analysis of the building surroundings and focused on mapping local habitats and animal species occurrence as well as on shadow analysis concerning the building itself. The analysis revealed wildlife barriers and enabled to identify several target habitats such as "mesophilic herbaceous fringe", "warm dry wall" and "woodruff beech forest" and some target species such as the European hedgehog, the greater mouse-eared bat, the redstart, the house martin, the sand lizard and the masked bee. The second step was to identify the criteria to rule out habitats and species to be used by means of an exclusion procedure. The third step was to embed the results of the ecological analysis and to develop a concept for the design of the façade. For this, bricks were used as feasible material to create a structured green façade that mimics the selected habitats while meeting the ecological requirements of the selected target species.

In conclusion, of the choice to use habitats as reference model facilitated plant selection for the façade greening and, in turn, the target species selection proved beneficial in structuring the façade while providing hints for the garden layout.

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PROPOSAL OF AN INTEGRATED ECOSYSTEM URBAN INDEX FOR THE URBAN PROJECTS EVALUATION IN ECOSYSTEMIC KEY

Session Type
Academic Sessions
Date
02/24/2022
Session Time
04:00 PM - 05:20 PM
Room

Hall A

Lecture Time
04:10 PM - 04:20 PM

Abstract

Abstract Body

The complex structure of cities based on the multiple interrelationships of different sub-systems (economic, social and environmental type) requires actions designed according to integrated logics aimed at urban sustainable principles. In accordance to current international and European planning dispositions on sustainable development, there is shared interest in programming-planning objectives of interventions to support territorial growth ensuring goods and services production in view of intergenerational equity. The actual epidemic emergency and its impact on the socio-economic, productive and environmental assets have highlighted the need to act in the city with a view to ensuring uniformity between territorial portions through services and goods so to mitigate the corresponding trade-offs in terms of the citizen’s needs.

The improvement and preservation of existing built-natural environment capable of generating services, i.e. multiple social, environmental and economic benefits for the community (eco-systemic services), is a strategic asset for many European and non-European cities during the last decade of the 20th century. The Food and Agricultural Organization and the Arbor Day Foundation are supporting city administrators to pursue sustainable development goals through nature-based solutions, capable of producing eco-system services, through the "Tree Cities of the World" programme.

In order to support initiatives planning according to sustainable criteria that consider the value aspect of the city measured in terms of eco-systemic services, this contribution proposes the creation of a synthetic index, the Integrated Ecosystem Urban (IEU) index, as incentive for public and/or private subjects to express convenience judgements on urban renewal projects as well as to identify priority intervention areas from an eco-systemic point of view. The construction of IEU indexes is conducted through a multi-parameter methodological approach (Integrated Assessment Framework, IAF). The proposed IAF is made by logical-operational phases that lead to the definition of the proposed index. Some of them are characterized by the implementation of algebraic structures typical of the Benefit of Doubt Approach and of Goal programming. The applicability of the proposed index is investigated by referring the IEU index to the metropolitan context of New York in USA.

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URBAN ECOSYSTEM ASSESSMENT FOR THE COASTAL CITY OF CÁDIZ

Session Type
Academic Sessions
Date
02/24/2022
Session Time
04:00 PM - 05:20 PM
Room

Hall A

Lecture Time
04:20 PM - 04:30 PM

Abstract

Abstract Body

Coastal cities are suffering an accelerated growth that will continue in future decades, putting extraneous pressure on urban ecosystem services. The study of urban areas as social-ecological systems and the development of analytical frameworks enable the understanding of a complex network of relationships between anthropic and natural variables. Nonetheless, an integrated, efficient and appliable framework that will facilitate the implementation of Ecosystem-Based Management principles for urban management is not yet available. This research integrates a series of tools and frameworks like the SES Framework, the DPSIR and remote sensing techniques to identify and determine the state for urban ecosystems services. This methodology allowed the description and identification of urban ecosystem services in Cádiz in Southern Spain. For each city, this research described in detail the characteristics and relationships of the social-ecological system. It also determined the main drivers and pressures over the urban ecosystems services. Additionally, it measured the state's change using remote sensing techniques like the Normalised Vegetation Index for urban vegetation, the Normalised Built-up Index for urban sprawling, Chlorophyll and Total Suspended Matter for water bodies and NO2 as an indicator of atmospheric pollution. Finally, taking into consideration the gather information, this research proposed a series of responses based on the Ecosystem-Based Management principles. This integrated methodology has proven to be an efficient, relatively simple and useful technique for urban and environmental managers looking for more sustainable and resilient cities.

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LESSONS ON THE DEVELOPMENT OF THE URBAN NATURE INDEX

Session Type
Academic Sessions
Date
02/24/2022
Session Time
04:00 PM - 05:20 PM
Room

Hall A

Lecture Time
04:30 PM - 04:40 PM

Abstract

Abstract Body

The Urban Nature Index is a new index to be released by the International Union for Conservation of Nature (IUCN) in 2021. It aims to measure the impact of cities on nature at the local, regional, and global scale. In this presentation, we will share our process of developing the Urban Nature Index from start to finish. Our process is guided by the need to identify science-based measures informed by the latest reports on drivers of biodiversity loss and leverage points for transformation for the conservation of nature. It also responds to the varied needs of cities, even at different capacity levels.

We will share how we pulled relevant experts from IUCN's membership to compose the Technical Experts Group, and how they determined the three primary scales of concern for the project. We then combined this advice with the results of a literature review to form the theoretical framework for the index that would also accommodate varying local contexts. Then we refined the potential indicators initially put forth by the Technical Experts Group, prioritized them, and filled in any gaps in their coverage to produce the first working version for testing. We will share the guiding principles that we followed to come up with an early version of the index, and what we then learned from feedback of city representatives, including several pilot cities, before the full release of the Urban Nature Index. Come along with us on our journey - we found this process enlightening and hope that you will too!

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STUDY OF MULTIFUNCTIONAL ECOSYSTEM SERVICES GENERATED IN AN EXPERIMENTAL DESIGN COMBINING GREEN ROOFS AND PHOTOVOLTAIC PANELS.

Session Type
Academic Sessions
Date
02/24/2022
Session Time
04:00 PM - 05:20 PM
Room

Hall A

Lecture Time
04:40 PM - 04:50 PM

Abstract

Abstract Body

The increasing of urbanization in already large cities leads to the continuous erosion of natural environments, and environmental issues as pollution or urban heat island. While this development entails significant consequences on biodiversity and human societies, roofs became more attractive over time to be used as production space (e.g. for energy or food) or vegetated roofs. The development of green roofs is expected to provide numerous key ecosystem services such as improving air quality, lowering water runoffs and increasing pollination.

Associating two uses on the same roof can lead to competition in a limited spatial context, but also potential complementarity. In this study, we combined photovoltaic panels and green roofs with different levels of plant diversity in a multifunctional approach. Our aim is to understand how the addition of photovoltaic panels on green roofs can positively or negatively influence the ecosystem services provided, such as water runoff, pollination, thermal comfort and electricity production. The interaction and feedbacks between these two elements can be equally complex and two-way: adding a solar panel on a vegetated roof can influence and change plant and pollinator populations and the evolution of substrate and water runoff volume and quality. Conversely, plant population, through evapotranspiration, can lower the temperature of panels and increase electrical production.

In order to study these hypotheses, we built a multicriteria system on 200 m² and composed of 28 experimental units. These replicated units include treatments with substrate only, substrate only with solar panels, and green roofs with or without solar panels at 2 levels of plant diversity/community compositions. This presentation will summarize and discuss the results comparing, between systems, the analyze of electric production, pollination, thermal comfort, plant diversity evolution and growth, substrate evolution in terms of physicochemistry, and the quantity and quality of runoff water.

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Q&A

Session Type
Academic Sessions
Date
02/24/2022
Session Time
04:00 PM - 05:20 PM
Room

Hall A

Lecture Time
04:50 PM - 05:20 PM