Riparian Allegories: Athenian Riverscapes as climate-adaptive Urban Figures | Thesis on Urban Landscape Design

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Riparian Allegories: Athenian Riverscapes as climate-adaptive Urban Figures | Thesis on Urban Landscape Design

Information

  • Project Name: Riparian Allegories: Athenian Riverscapes as climate-adaptive Urban Figures
  • Student Name: Xenia Stoumpou & Valerian Portokalis
  • Awards: 1st prize in DAIDA Global Thesis Award 2023 | Finalist in EUmies Awards Young Talent 2023
  • Softwares/Plugins: AutoCAD , Adobe Photoshop , Adobe Illustrator , GIS
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Excerpt: Riparian Allegories: Athenian Riverscapes as climate-adaptive Urban Figures’ by Xenia Stoumpou and Valerian Portokalis from the Department of Architecture – KU Leuven, is an urban landscape design thesis that explores the formulation of a cogent narrative on how the lost riverscapes of Athens can serve as spatial and symbolic vessels for socio-ecological change. This is done by fundamentally reweaving environmental and social systems through robust green-blue infrastructural commons.

Introduction: A plain surrounded by mountains and opening to the sea, Athens has historically developed in and as a mythical and functional landscape, embedded in a strong and diverse geographical figure. Over the course of the 20th century, the two main rivers—Ilissos and Kifissos—which were once deified ancient rivers in an arid land, were consumed by modern urban expansion and turned into urban wastewater receptors.

Amid the growing urgency surrounding the global climate, metropolitan Athens is forced to face its own inadequacies, spiralling into an unending state of disaster. To discuss and ultimately apply climate-adaptive strategies to a stressed urban condition, the thesis explores the formulation of a cogent narrative on how the lost riverscapes of Athens can serve as spatial and symbolic vessels for socio-ecological change. This is done by fundamentally reweaving environmental and social systems through robust green-blue infrastructural commons.  

A tangible reconfiguration can only be realised through the latent spatial figures of the Athenian rivers, Ilissos and Kifissos. Their transformation can be seen as an allegory for a new resilient urban vision, adding ecological value, introducing productive opportunities, and inspiring new ways of living in a densely populated Mediterranean urban environment due to their omnipresence and enduring symbolic value.

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Site Context

The entire city of Athens will experience global warming, with corresponding local hotspots dispersed throughout the metropolitan area. Excessive ground sealing, the removal of open spaces, and high building densities all intensify the effects of global warming, further exacerbating already-existing social disparities.

A variety of green-blue infrastructures woven throughout the city’s structure could provide natural filters where pollution levels are currently skyrocketing, shade and cooling where heat waves are unavoidable, and retention space where flooding is most likely to occur. Thus, the scale-transcending proposal is an adaptation strategy that helps on a metropolitan scale while providing local relief and eventually programming landscape infrastructures to support climate equity.

Riparian Allegories: Athenian Riverscapes as climate-adaptive Urban Figures | Thesis on Urban Landscape Design
Ilissos as Deified River in an Arid Land © F. Boissonas, 1910

The effects of global warming are made worse in Athens by careless and inappropriate developments, and damage is frequently amplified by cascading, overlapping effects. To effectively address vulnerability and create resilient social and urban infrastructure, socio-ecological strategies are therefore crucial.

Riparian Allegories: Athenian Riverscapes as climate-adaptive Urban Figures | Thesis on Urban Landscape Design
Kifissos as Degraded Part of an Urban Underworld © Authors 2021

Here, the incremental restoration of the primary design case study (Olive Grove) that is being proposed in contrast to future real estate justifications, essentially promotes the development of an unusual, inhabited but significantly reforested metropolitan park next to the western municipalities and impoverished downtown areas. This significantly increases accessibility to open, green public spaces that can support productive, socially inclusive activities like community-supported agriculture, alternative agro-living models, and shared water resources, all while effectively reducing the risk of flooding.

Design Process

Riparian Allegories: Athenian Riverscapes as climate-adaptive Urban Figures | Thesis on Urban Landscape Design
Alarming Futures: Comparative Hazard Mapping. Heat, Fire and Flood are already pressing issues, expected to exacerbate in the future
Inherent Deficiencies: Landscape System of the Athenian Basin, Explosive Urbanisation and Sealed Grounds, Compromised Hydrological Network

As a result of forecasts regarding heat waves, fire danger, and flood and drought, metropolitan Athens is frequently placed in a state of climate emergency. An initial mapping based on climate data indicated the spatialization of climate hazards at the metropolitan scale. The transition from a natural landscape system to man-made grey infrastructure was understood through extensive historical mapping and fieldwork, which also revealed the water cycle’s symbolic persistence. The water cycle’s spatial and functional recollection were revealed.

Riparian Allegories: Athenian Riverscapes as climate-adaptive Urban Figures | Thesis on Urban Landscape Design
Inherent Deficiencies: Landscape System of the Athenian Basin, Explosive Urbanisation and Sealed Grounds, Compromised Hydrological Network

To create a comprehensive landscape system of water retention, re-use, and remediation on a metropolitan scale, site-specific interventions were envisioned. The project looks at creative ways to view urban wastewater and rainwater as complimentary systems, thereby redefining the city’s approach to managing its water resources.

Riparian Allegories: Athenian Riverscapes as climate-adaptive Urban Figures | Thesis on Urban Landscape Design
Landscape System: Reconnecting the Basin by repairing the disrupted hydrological network of Ilissos and Kifissos as a strategy for climate adaptation

Elaionas (Olive Grove), an 11 km2 brownfield in the middle of the city, is the subject of the primary design case study. This region is the topographically defined flood plain of the Kifissos River, which was once home to the 10,000-tree ancient olive grove on the Athenian plain. It is a field in desperate need of social and ecological reconstruction as a result of its industrialization and subsequent decline.

Final Outcome

Elaionas Flooding Mosaic: The incremental transformation into a multi-functional, inhabited metropolitan park
Riparian Allegories: Athenian Riverscapes as climate-adaptive Urban Figures | Thesis on Urban Landscape Design
The envisioned three-fold water system as run-off treatment and water recycling mesh
Riparian Allegories: Athenian Riverscapes as climate-adaptive Urban Figures | Thesis on Urban Landscape Design
Mosaic of Imperviousness as de-sealing potential

The site is redesigned as a flooded mosaic, a kidney of sorts, that will systematically afforest while retaining and treating stormwater runoff on a metropolitan scale. The existing agricultural plot layout and the large number of undeveloped but sealed surfaces are driving the design to include a three-fold water system that is interwoven with urban terraces and manufacturing clusters, acting as a water recycling and run-off treatment system.

Riparian Allegories: Athenian Riverscapes as climate-adaptive Urban Figures | Thesis on Urban Landscape Design
Growing back the Grove: Interwoven pattern of different forest types
Riparian Allegories: Athenian Riverscapes as climate-adaptive Urban Figures | Thesis on Urban Landscape Design
Variations of a Metropolitan Urban Grove: Case studies of different instances of water and forest hybrids

The core concept of Elaionas is the preservation, reuse, and distribution of water, accounting for up to 8% of total water consumption in the city. This will be achieved by gradually changing the current mosaic to create a socially conscious, multipurpose, and inhabited Grove through a dynamic transformation process. The proposed design is just one of several possible results from a protracted transformation process that can anticipate and adapt to change.

Riparian Allegories: Athenian Riverscapes as climate-adaptive Urban Figures | Thesis on Urban Landscape Design
Variations of a Metropolitan Urban Grove: Case studies of different instances of water and forest hybrids
Riparian Allegories: Athenian Riverscapes as climate-adaptive Urban Figures | Thesis on Urban Landscape Design
Variations of a Metropolitan Urban Grove: Case studies of different instances of water and forest hybrids

One viable and resilient approach to the modern city of Athens’ adaptation to the new climate realities is to repair the hydrological network and reconnect the Basin. Long-standing dichotomies between grey-vs-green and leisure-vs-infrastructure space are challenged by interventions, which create innovative hybrid forms that serve as fresh models of a water-sensitive and socially inclusive urbanism.

Conclusion:  The project in its entirety serves as an example of how to revitalise abandoned riverscapes and use them as an allegory for a new, resilient urban vision that also adds ecological value, creates opportunities for productivity, and inspires new lifestyle choices in a densely populated urban setting.

[This Academic Project has been published with text submitted by the student]

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