Author Archives: Mathias Lehner

Celebrate 10 years nextcity.nl with us!

(Nederlands zie onderaan)

Hello everybody!

We kindly invite you for a little gathering celebrating 10 years of nextcity.nl!

Thursday, September 19th, 2024 @ 15:30 hrs, New Institute

We are looking back with friends, but also 10 years into the future of nature inclusive cities with experts, practitioners and young talents. Enjoy a summerly program with little lectures, an informal panel and nature inclusive networking.

The session takes place right in the middle of the main IABR (international architecture biennale Rotterdam) exhibition ‘The Nature of Hope’ in the New Insitute in Rotterdam’s Museumpark. Haven’t seen the IABR exhibiton? This is an excellent opportunity (ticket/museum card required).

At 17:00 hrs we invite you for informal drinks on the terrace.

Join us and dive into the nature-inclusive city, meet inspiring colleagues and make connections!

There is a limited number of seats. Please let us know if you will join us via a short message to 10@nextcity.nl, so we can treat you for drinks and a special gift!

NEDERLANDS

Hallo allemaal!

Wij nodigen je van harte uit voor een bijeenkomst ter ere van 10 jaar nextcity.nl!

19 september 2024 om 15:30 uur, Nieuw Instituut

We blikken terug, maar ook 10 jaar vooruit naar de toekomst van natuurinclusieve steden met vrienden, experts, professionals en jonge talenten. Geniet met ons van een zomers programma met korte lezingen, een informeel panel en natuurinclusief netwerken.

De kennissessie vindt plaats midden in de hoofdtentoonstelling van de IABR (internationale architectuurbiënnale Rotterdam) ‘The Nature of Hope’ in het Nieuwe Instituut aan het Rotterdamse Museumpark. Heb je de IABR-tentoonstelling nog niet gezien? Dan is dit een uitstekende gelegenheid om een kijkje te nemen (entree- of museumkaart vereist).

Om 17:00 uur nodigen we u uit voor een informele borrel op het terras.

Kom langs en duik in de natuurinclusieve stad, ontmoet inspirerende collega’s en leg verbindingen!

Er is een beperkt aantal plaatsen. Laat ons via een kort berichtje aan 10@nextcity.nl weten of je erbij bent, dan kunnen we je trakteren op drankjes en een speciaal cadeautje!

How does an ant perceive the smell of compost?

(c) Sorrel-Eva Fiore Kovacovsky

This could be one of the more-than-human stories gathered in “The Book of the Ten Thousand Things” created for documenta15 by La Intermundial Holobiente. “Inbetweenery” is the proposal by artist Claudia Fontes, philosopher Paula Fleisner, and writer Pablo M. Ruiz to translate “intermundial” into English.  This book will partly be read in the Between Us and Nature’ reading club in the wonderful Zabriskie Book Shop on August 10th, 2022, 1830 hrs.

The book is a publication written and edited in a polyphonic way among fourteen artists and writers from Argentina: Erica Bohm, Virginia Buitrón, Gabriela Cabezón Cámara, Tulio de Sagastizábal, Lucas Di Pascuale, Carla Grunauer, Reynaldo Jiménez, Guadalupe Lucero, Anahí Rayén Mariluán, Leticia Obeid, Sergio Raimondi, Luis Sagasti, Ral Veroni, Susana Villalba, and the “intermundiales” themselves. The Book of the Ten Thousand Things, Quilmes, Buenos Aires, 2022,

Zabriskie chooses texts related to natural sciences, art, anthropology, postcolonialism and the (post)anthropocene from a female perspective. Attendees read passages together out loud, and share experiences and thoughts about the nature they live in. Looking beyond disciplines, the group creates a space to learn from and with bacteria, algae, fungi, soil and multinaturalist narratives.

What:​ Between Us and Nature – A Reading Club is in English language
Where​: Zabriskie, Reichenberger Str. 150, 10999 Berlin
When:​ Wednesday August 10 , 2022 18:30 CEST -20:30 (sharp!)
Who:​ small group of lovely, people reading collectively
Why:​ to read together, be inspired and meet people
Hosts:​ Eva-Fiore Kovacovsky, artist, and Sina Ribak, researcher for ecologies and the arts

Personal rsvp is necessary: please register by email.

In collaboration with La Intermundial Holobiente and Zabriskie Buchladen für Kultur und Natur.

Biotope City Conference Recordings Online Now

Friday 24th of September 2021 the Biotope City conference took place with more than 160 participants from Austria, Germany, The Netherlands, Sweden, Greece, Italy and other countries. Now the recordings are avaible online. Please see the little movies per speaker below, or watch the entire conference moderated by nextcity.nl’s Mathias Lehner here (4 hours).

Helga Fassbinder, founde of Biotope City Foundation: Biotope City – Philosophie, Konzept, Prinzipien (14 mins)

Bernhard Scharf, Green4cities, BOKO: Green Cover Effects (11 mins) Angelique Bellemakers, INBO architects: Participation of residents (8 mins) Marlies Zuidam, FAAM architects : Nature inclusion of fauna (14 mins)

Maria Auböck, Auböck+Carasz landscape architects: Building management and open space care (16 mins)
Brenda Swinkels, Van den Berk nurseries: Urban-climate-trees and insect diversity (19 mins)
Tim Elfring, Phood Kitchen Eindhoven: Urban farming (11 mins)

Florian Kraus, Greenpass, BOKU: Micro-climate simulation (11 mins)
Florian Reinwald, Institute of Landscape Planning ILAP, BOKU: Regulations – revisions and regulations in building law (10 mins)
Jeanne Astrup-Cauvaux, Raumlabor: Floating University Berlin (14 mins)

20 ideas for integrating biodiversity

(c) Amsterdam Municipality

Biodiversity experts Anne Blokker and Geert Timmermans of the Amsterdam Municipality compiled a brochure with 20 ideas how to integrate biodiversity in urban planning and development. The insightful publication was originally published in Dutch, but is now also available online in English.

From nesting bricks for birds, over green roofs and eco-friendly banks up to an interconnected ecological structure these richly illustrated 26 pages make it easy to explain the benefits, and paths of action to clients, spatial designers and colleagues.

The publication is freely available on issue.

Symposium: Climate resilient, green and nature inclusive city

On September 24, 2021 Biotope City Foundation Amsterdam/Vienna and the Viennese BOKU University for Natural Resources and Life Sciences organize an online symposium on the nature inclusive future of our cities.

The topics addressed will include the freshly realized Biotope City in Vienna, the Floating University Berlin and 10 sessions on top climate resilient strategies (such as sponge cities, participation, green cover effects, climate trees and urban farming), concluded by lessons learned for the future.

Speakers include Helga Fassbinder, Jeanne Astrup-Chauvaux next to Bernhard Scharf (Green4cities), Angelique Bellemakers (INBO architects) Marlies Zuidam (FAAM architects), Maria Auböck (Atelier Auböck+Karasz), Brenda Swinkels, van den Berg Nurseries, Tim Elfring (Phood Kitchen), Steven Delva (Delva Landscape Architecture Urbanism), Pia Minixhofer & Sebastian Hafner (BOKU), Florian Kraus (Greenpass) and Florian Reinwald, (Institute of Landscape Planning ILAP).

Moderator: Mathias Lehner, research director nextcity.nl and strategic advisor urban development Zaanstad Municipality

Date: 24th September 2021
Time: 9:00 – 13:00 hrs, online
More info and program in English and German here.

If you want to join, please register with an email to contact@biotope-city.net.

The symposium via Zoom can be accessed here. Meeting-ID 914 3531 0298,code 918728.

Keep the distance – to city trees!

When it comes to value creation ‘climate’ trees (klimaatboom in Dutch) are playing on an olympic level. Financially houses are worth 8-15% more with adjacent green and trees according to brokers. Socially, people are happier in a green environment with trees. Old trees do even better: they evaporate more moisture and absorb more water (up to 500 times) than a young tree. So, how is it possible that trees often die young, whereas an old tree is much more valuable?

In cities, lack of expertise on how to lay out and dig for underground cables and pipes is a frequent reason for ermanent damage. Digging within 6 meters of a tree of 1 meter diameter or within 2 meters of a tree up to 30 cm diameter impacts the tree’s roots.Today, trees are sometimes placed on top of a cable and pipe or the cable is laid underneath. When the cable is replaced (once every 25 years) tree roots are severely damaged, and with fungal ingrowth, the tree dies a few years later. Ideally cables and pipes are at least 2 meters from trees if we want to get trees big and old. So, we can do better, can’t we?

In the past small trees were also planted on two sides in the sidewalk of narrow streets. With reduced fitness and less space for roots, growing old is a major achievement for a tree then! Today, often more space is reserved for trees, both above and underground, in order to have trees that age sustainably. A tree squeezed in between the pavement does not have a long life. 9 m3 of rootable space above the groundwater level is required for a small tree up to 6 meters in height. Want a large tree of more than 24 meters in height? You’ll need at least 65 m3 of rootable space. It’s no wonder that tree roots push up pavement when there is no space and moisture, while they are searching for nutrients.

So, keep the distance and give city trees the space they deserve, and let us humans enjoy the values created and the full range of ecosystem services to adapt to climate change.

This post is based on a memo by Frans Lubbers, maintenance specialist water and green @Zaanstad Municipality accompanied by an article by Bart Mullink in Boomzorg 3/2021.

How health and well-being in pandemic times relate to the use public outdoor space


Organized by Wageningen University assistant professor Agnes Patuano the symposium ‘Public Outdoor Spaces and Covid-19’ held on 24th and 25th of June, 2021 addressed the question “How will the COVID 19 pandemic impact the use and design of public spaces, and how was it impacted by them in the first place?”

The symposium brought together recent research from WUR, HvA, BOKU, Radboud University, Marie Curie University, University of Milan, Aeres University and Universidad Nacional Agraria La Molina.

Mathias Lehner contributed with a talk on his approach and research on nature-inclusive public space, with a focus on reclaiming ‘car-space’ in cities, in order to redesign integral blue-green-grey networks that boost quality of public space, while contributing to human health and well-being. Read the summary here.



Hidden treasures for a sustainable city – Biotope City Vienna

(c) image: Bauplatz 3 (ÖSW/Rüdiger Lainer + Partner) Visualisierung: Schreiner, Kastler

Praised by the advisory board of IBA_Wien because of “the consistent approach of a multi-layered implementation of contributions to climate adaptation in new neighborhoods” and the “scientific support for neighborhood development in connection with climate-relevant contributions” the new Biotope City Wienerberg urban quarter is an interesting and very recent urban development to study in more detail.

Biotope City Wienerberg will be presented as part of IBA_Wien in 2022 on an international level as an innovative model example for future solutions in connection with adaptation to climate change in urban areas. The project contains many qualities that are not immediately visible upon completion at the end of 2020. But already now, IBA Vienna has published the brochure “Hidden Treasures“, which describes the hidden treasures of this forward-looking district.

Published by: IBA_Wien 2022 – Neues soziales Wohnen
Content and editors: Knollconsult Umweltplanung ZT GmbH Prof. Dipl.-Ing.in Dr. Helga Fassbinder Institut für Landschaftsplanung, BOKU Wien Articles by: Stiftung Biotope City Green4Cities GmbH, DI Thomas Romm, forschen planen bauen, ZT Lehner Real Consulting GmbH, Stadtteilarbeit Caritas der Erzdiözese Wien
Graphics and layout: Knoll Kommunikation GmbH

Housing quarters rich in nature – learning from experiences

Cover brochue (c) KAN

Building with nature requires a different way of working from developers, construction parties and housing corporations. This include new knowledge, a different perspective and a different role in the process. The study ‘Learning from natural residential areas from the past’ has come up with concrete tools for the development process, design, implementation, management and communication. These are now briefly summarized in the digital brochure which can be downloaded for free at KAN (Climate Adaptive Network Netherlands).

Green as Building Material Conference

On May 26-27 2021 the ‘Green as Building Material conference on ecological and nature inclusive design of the climate resilient city ist organized by Delft University of Technology.

The aim of the conference is to investigate and discuss the value of implementation of Nature in the built environment. Nature offers a range of specific ecosystem services. Two examples of such services are provided by vegetation in form of mitigation of heat stress in cities through provision of shadow and evaporation of water, and retention of water during intense rain showers reducing risk of flooding. Ecosystem services can play an important role in designing current and future climate-proof cities. In addition to aforementioned city cooling and water retention, many more useful ecosystem services can be provided by Nature. Further examples are cleaning of air, water and soil, and strengthening of biodiversity in the urban environment. Nature-inclusive cities are therefore healthier, more attractive, and thus overall more liveable.

On May 27 Mathias will speak about his research and findings within his vision of the ‘Next City’ as a biodiverse and nature-inclusive city of the future. The lecture is part of the session on design consequences of integral nature-inclusvie building.