A few days ago I asked a reader of this blog if there was anything, in particular, that she’d like to see more of on here. She responded by saying that she’d love to learn more about how other cities—outside of Toronto—are managing urbanization, as well as how we shape cities and cities shape us.
Would love to read how other cities are managing the growth of urbanization, how we change cites and they change us @donnelly_b
It’s an interesting and important question because, frankly, the challenges are greater outside of Toronto. One of the stats that often gets cited here in the media is how the Greater Toronto Area gets approximately 100,000 new immigrants every year. This doesn’t include domestic migration though, so I would assume that our total number is even greater.
But if we stick with 100,000 for now, it means the GTA receives about 11.4 new immigrants every hour (100,000 people / 8,765 hours in a year). Lagos, Nigeria, on the other hand, receives between
Shaping Cities in an Urban Age is the third book to come out of the London School of Economic's Urban Age project. It was published last fall. The first two titles were, Living in the Endless City (2011) and The Endless City (2007).
If you're familiar with the first two publications, you'll know that these books are heavily illustrated. Lots of maps, charts, and diagrams. So they make great coffee table books. But they're also filled with insightful essays -- this one has 37 of them.
In this particular book the focus is on the following:
"It identifies current trends that are making cities more fragmented, less equitable and environmentally more damaging, and argues powerfully for a more integrated social, environmental and spatial approach that can inform and inspire city-makers that are shaping an increasingly urban world."
I am sharing this with all of you today because I have always really enjoyed these books. They have a way of quickly putting things into perspective globally.
Around 2.5 billion more people are expected to live in an urban agglomeration by 2050. And 90% of this growth is expected to happen in just two places: Asia and Africa. This is an unprecedented shift that will obviously create many challenges and many opportunities.
If you take a look at the complete list of the world’s fastest growing cities (all estimates, of course), you’ll likely notice that the vast majority of the cities are in the developing world. And that’s really the challenge. The world is rapidly urbanizing and becoming the most urban it’s ever been, but the changes are the greatest outside of developed nations. This poses entirely unique challenges.
Of the kinds of cities I’m talking about, I’m most familiar with Dhaka, Bangladesh. In my last year at Penn, I was part of a studio led by KieranTimberlake Architects that focused on water and housing issues in that city. It was a partnership with the University of Dhaka. We spent roughly 2 weeks there and it was an eye opening experience.
Here’s a telling slide from our final presentation:
What we were trying to do with this chart was compare population and per person land value for our development site according to various city types. In other words, we were essentially asking: If we were to build out our proposed site in the same way, as say, Dallas, Los Angeles, Hong Kong, or what is typical for Dhaka, how many people could we fit and what would be the resulting per person land value?
I don’t remember where we got the land value figures from, but we were trying to be cognizant of the fact that every city requires a unique solution. Using the same per person land values in Dhaka as in Dallas would be unimaginable because Dhaka has over 40,000 people per square kilometre (top right on the diagonal line above) and Dallas has under 1,400 per square kilometre (bottom left on the diagonal line above).
The challenges of urbanization in the developing world are profound, particularly in places like Dhaka where most of the city is subject to severe annual floods. By some estimates, 18% of the city’s land area gets flooded every year—talk about adding another layer of city building complexity.
We didn’t solve all of the problems in that studio and we’re not going to do it here, but I do think it’s important to fully understand the problem. One of my favorite books on cities is called “The Endless City." It examines New York, Shanghai, London, Mexico City, Johannesburg and Berlin, and has a ton of great data and diagrams.
Here are a two that outline densities and land use patterns for the above 6 cities (same order starting on the top left):
