The correct interpretation of the concept of a 500 or 1,000 year flood

A flood expert addresses five myths about floods and this includes the idea that a 500 year flood only happens once every 500 years:

Myth No. 3
A “100-year flood” is a historic, once-in-a-century disaster.

Describing floods in terms of “100-year,” “500-year” and “1,000-year” often makes people think the disaster was the most severe to occur in that time frame — as encapsulated by President Trump’s tweet calling Harvey a “once in 500 year flood!” He’s not alone. When researchers from the University of California at Berkeley surveyed residents in Stockton, Calif., about their perceived flood risk, they found that although 34 percent claimed familiarity with the term “100-year flood,” only 2.6 percent defined it correctly. The most common responses were some variation of “A major flood comes every 100 years — it’s a worst-case scenario’’ and ‘‘According to history, every 100 years or so, major flooding has occurred in the area and through documented history, they can predict or hypothesize on what to expect and plan accordingly and hopefully correct.”

In fact, the metric communicates the flood risk of a given area : A home in a 100-year flood plain has a 1 percent chance of flooding in a given year. In 2018, Ellicott City, Md., experienced its second 1,000-year flood in two years, and with Harvey, Houston faced its third 500-year flood in three years.

That risk constantly changes, because of factors such as the natural movement of rivers, the development of new parcels of land, and climate change’s influence on rainfall, snowmelt, storm surges and sea level. “Because of all the uncertainty, a flood that has a 1 percent annual risk of happening has a high water mark that is best described as a range, not a single maximum point,” according to FiveThirtyEight.

I am not surprised that the majority of respondents in the cited survey got this wrong because I have never heard it explained this way. Either way, the general idea still seems to hold: the major flooding/storm/disaster is relatively rare and the probability is low in a given year that the major problem will occur.

Of course, that does not mean that there is no risk or that residents couldn’t experience multiple occurrences within a short time period (though this is predicted to be rare). Low risk events seem to flummox people when they do actually happen. Furthermore, as noted above, conditions can change and the same storms can create more damage depending on development changes.

So if this commonly used way of discussing risk and occurrences of natural disasters is not effective, what would better communicate the idea to local residents and leaders? Would it be better to provide the percent risk of flooding each year?

The difficulty of measuring a splintered pop culture

What are common pop culture products or experiences in today’s world? It is hard to tell:

Does Eilish, for instance, enjoy the same level of celebrity someone of equal accomplishment would have had 15 years ago? I don’t know. There are Soundcloud stars, Instagram stars, YouTube stars, Twitter stars, TikTok stars. Some artists, like Eilish and Lil Nas X, transition from success on a platform like Soundcloud to broader reach. But like Vine, TikTok has its own celebrities. So do YouTube and Instagram. We’ll always have George Clooneys and Lady Gagas, but it almost feels like we might be lurching towards a future with fewer superstars and more stars.

We can still read the market a little more clearly in music, and on social media, but the enigma of streaming services illustrates these challenges well. The problem is this: At a time when we’re both more able and more willing to concentrate in niches, we also have fewer metrics to understand what’s actually happening in our culture…

We have absolutely no idea. People could be watching “Santa Clarita Diet” in similar numbers to something like “It’s Always Sunny in Philadelphia,” or they could be completely ignoring it. The same goes for every show on Amazon, Hulu, and Netflix. We can see what people are chattering about on social media (hardly a representative sample), and where the companies are putting their money. But that’s it. Not only do true “cultural touchstones” seem to be fewer and farther in between in the streaming era, we also have fewer tools to determine what they actually are…

But it also means there’s more incentive for the creators of pop culture to carve us up by our differences rather than find ways to bring us together. It means we’re sharing fewer cultural experiences beyond the process of logging onto Netflix or Spotify, after which the home screen is already customized. On top of all this, it means we’re more and more in the dark about what’s entertaining us, and why that matters. What does cultural impact look like in an era of proliferating niches, where the metrics are murky?

I wonder if this could open up possibilities for new kinds of measurement beyond the producers of such products. For example, if Netflix is unwilling to report their numbers or does so only in certain circumstances, what is stopping new firms or researchers from broadly surveying Americans about their cultural consumption?

There may be additional unique opportunities and challenges for researchers. There are so many niche cultural products that could be considered hits that there is almost an endless supply of phenomena to study and analyze. On the other hand, this will make it more difficult to talk about “popular culture” or “American culture” as a whole. What unites all of these niches of different sizes and tastes?

It will also be interesting to see in 10-20 years what is actually remembered from this era of splintered cultural consumption. What cultural phenomena cross enough boundaries or niches to register with a large portion of the American population? Will the primary touchstones be viral Internet videos or stories rather than songs, movies, TV shows, books, etc.?

 

A preview of my upcoming talk on social media, emerging adults, and religiosity

Ahead of my participation in the “Emerging Adults: Formation for Mission” conference taking place soon on the Wheaton College campus is an interview regarding my talk:

I would describe the use of social media by emerging adults as a mix of excitement and resignation. A vast majority of emerging adults participate. They describe learning about relationships they already have, connecting with friends and family, seeing pictures, sharing jokes.

They find out about events and news through social media. They search for romantic partners through social media.

On the other side, they can articulate some of the downsides of this use including a lack of focus, not spending time with people (just their feeds), and the conflict that can arise in social media. Not participating means missing key connections and knowledge that others can access. Current emerging adults have known and participated in social media all of their lives and will continue to use social media as they age beyond this life stage.

The emerging adults of today are immersed in social media, technology, and other forms of media and they bring this with them as they consider faith and church.

While there is a lot of work looking at social media or social network site (SNS) use, relatively little of it in sociology and other disciplines addresses how this activity is influenced by or influences religion. This talk will help bring together several years of research projects with my sociology colleagues Peter Mundey and Jon Hill.

Recognizing and learning from “radical suburbs”

A new book from journalist Amanda Kolson Hurley looks at “radical suburbs” that do not fit the stereotype of sleepy, homogeneous, bedroom communities. From an excerpt:

Clichés and misconceptions still define suburbia in the popular imagination, and it drives me crazy. I live in Montgomery County, Maryland, outside of Washington, D.C. I’m a suburbanite, but my life doesn’t revolve around manicured lawns, status anxiety, or a craving for homogeneity. My suburban experience is riding the bus as people chat around me in Spanish and French Creole. It’s having neighbors who hail from Tibet, Brazil, and Kenya as well as Cincinnati. It’s my son attending a school that reflects the diversity—and stubborn inequality—of America today…

Radical Suburbs is about waves of idealists who established alternative suburbs outside of Eastern U.S. cities, beginning in the 1820s and continuing through the 1960s. These groups had very different backgrounds and motivations, but all of them believed in the power of the local community to shape moral and social values, and in the freedom provided by outskirts land to live and build in new ways.

As opposed to the groups who went far into America’s interior to settle isolated communes, these were, in a paradoxical-sounding phrase, practical utopians. Staying close to the city let them try out new ways of living with a financial lifeline and emergency exit. Now, at a time when—it could reasonably be argued—the future of the country hangs on what suburbs do over the next 20 or 30 years, their history shows that bold social and architectural experimentation is not alien to suburbia. In fact, it’s a suburban tradition…

Over the past 150 years, suburbanites have lived in large communal dwellings and tiny shacks, Modernist apartments and neo-Gothic mansions. They’ve been renters and homeowners, domestic servants and corporate executives. They’ve cultivated both emerald lawns and food crops. They’ve sought escape from social progress, and freedom from convention.

Two quick thoughts:

  1. I would be happy if academics and the public alike, particularly those interested in urban regions and issues, would acknowledge and analyze the variety of suburban communities. This book and multiple other studies make exactly this case: the suburbia that is often criticized may fit some suburbs but certainly not all. As jus ta short list, there are suburbs of working-class residents, suburbs of non-white residents, communities built around different ideals than single-family homes and cars, edge cities, and more. Suburban communities may share some fundamental features yet differ significantly on other parts of social life.
  2. I’ll have to read the book but I would be interested in knowing if there are patterns as to how at least a few suburbs could pursue less conventional ideals while a good number of suburbs simply followed convention. In other words, how did radical suburbs start and how can other communities follow similar paths? If these communities present some models worth emulating, how do established suburbs change course? It is possible for suburbs to change but going against local inertia can require significant decisions.

Chicago area voter turnout around 13-15%

The Daily Herald describes the low turnout in municipal elections in the Chicago area a week ago.

Only 13 percent of the suburb’s registered voters cast ballots in Tuesday’s election, the lowest rate for any election since at least 2006…

With hundreds of races in each county, some drew more voters than others. The Hinsdale High School District 86 tax hike question in DuPage County brought more than 40 percent of the district’s voters to the ballot box, with the looming threat of massive extracurricular cuts if the request didn’t pass. It did.

But scores of other races had less than 5 percent turnout, according to vote totals available on some election websites, mainly because they weren’t contested…

The growth in actual voters is little comfort to political scientists, local politicians and suburban election officials, who worry low voter turnout shows a dangerous level of apathy by the electorate.

While the article tries to bring out the positive news – there are more registered voters compared to the last set of municipal elections and some races had higher turnout races – it is hard to sugarcoat these figures. The Chicago suburb in which I live had low turnout for the first mayoral race in years. These local elections can have a significant impact as local leaders react to external pressures as well as have internal discussions. Not every local official makes significant changes and many local officials may run to make small improvements and preserve the nature of their community. At the same time, many communities have key moments in their past to which they could point to as sending the community down a different route and altering the community’s character.

Again, if Americans claim to like local government and local control in suburban settings, why do they not vote in larger numbers for the officials who will help guide their communities and local governments?

“McMansions are the largest physical boomer legacy soon inherited by their children”

A Connecticut architect considers the McMansion legacy left by a generation of homeowners and builders:

Skyscrapers are the image of New York. The White House is more America than a home. And McMansions have become a punchline. When I sought to find land in 1982, a broker pushed a building lot in a McMansion development, pushing its allure by flatly asserting, “We’re talking about some seriously beautiful homes here.”…

Time has not been kind to we boomers. We basically tanked the entire world’s economy with “irrational exuberance” that found its most publicly grotesque distortion in those McMansions. Make no mistake millions of less-than-McMansions had more distortional impact on the credit markets than the hundreds of thousands of McMansion, let alone the one-off attempts by individuals who try to buy social legitimacy by building large homes — the real mansions…

McMansions are the largest physical boomer legacy soon inherited by their children, the millennials, who have had the worst economic birthing since the Great Depression. Kate Wagner was barely in her 20s when she called out the final fruits of 40 years of serial housing booms that afflicted America. But the impact of in-your-face domestic chest-beating is especially present in Connecticut, which realtor.com trumpeted as having the “metro” with the third most McMansions in the country. And that impact was doubled down by the added insult of unending instant “tear-downs” of those homes built in the previous generation in the tight Northeast.

As an architect I have remade any number of these instantly dated ego vehicles. We have also revived any number of raised ranches, garrison colonials and Capes. Often those homes need strategic expansion. But with McMansions, removal of the offending detail and pretense is often the first remediation.

I like the idea that a social group – here the emphasis is on Baby Boomers – can leave a physical legacy for later members of the same society. People do not just pass down values, norms, and behaviors; they also leave a physical landscape and places that they have made and shaped. Even though we do not focus much on this in the United States, these places shape us and also provide inertia for what future residents will experience. McMansions have the potential to influence millions of lives even as the original designers, builders, and residents may no longer be present.

At the same time, I wonder how obvious the excesses of the McMansion were while they were being constructed in large numbers. It is relatively easy today to look at them with disdain or wonder at what prompted them. A blog like McMansion Hell has the benefits of hindsight as well as new eyes from a younger resident from a different generation. Did this architect call out McMansions back in the 1990s when wealthy Connecticut communities built them in large numbers? My own research suggests the tide starts to turn against McMansions in the early to mid 2000s as consistent critiques of their architecture and consumption arise as well as there are enough of them in communities across the United States to see them as a single phenomenon.

Going forward, I don’t think McMansions will disappear. There is plenty of money to be made in McMansions compared to building smaller housing units. It is not clear that all millennials or future homebuyers will see them as homes to be avoided. And many of the McMansions critics say are poorly built and designed will last for decades.

Learning about the notorious criminals of other major cities

In recently reading Tenements, Towers & Trash: An Unconventional Illustrated History of New York City, I learned about several notable criminals and crimes in the largest city in the United States. This got me thinking: does every large city have its cast of unsavory lawbreakers that are relatively unknown to those who live outside the city or region?

Without reading histories of every large American city, it is hard to know. And I wonder if it is harder for these infamous characters to go unnoticed on the national scene today with the round the clock news coverage online and on TV that can talk about possibly criminal activity for hours and days without stop. On the flip side, these local characters might even become a part of civic pride or a grim experience everyone has shared or even tourist fodder. While cities can be compared on overall crime statistics (such as with claims that Chicago is the murder capital of the United States), stacking criminal individuals or groups against each other is a more nuanced task.

And would it be worthwhile to be able to name a few notable criminals from every major American city? These cases could help reveal some unique local history and character. But, they could also reinforce notions that cities are centers of crime. With so much interesting material to learn about a large city and/or a metropolitan region, criminal activity would be far down my list of what I would want to know.

A town of over 53,000 residents can elect a mayor with just over 3,600 votes

Municipal elections in Illinois took place this past Tuesday. In my suburban community of just over 53,000 residents, here are the results for the two races:

WheatonMunicipalElectionResultsApr19

In races for two important local positions, voter turnout was relatively low. Of the roughly 41,000 adults in the community 18 and older, the mayor was elected by 3,617 voters while his opponent had just over 3,200 votes. In the councilman race, the numbers are a little harder to interpret because voters could select two but the numbers are certainly not much higher. Overall, under 20% of adults voted (hard to know how many are registered) and less than 10% of those adults selected the next mayor.

Perhaps there are a variety of factors at work:

  1. Do residents/voters believe that municipal elections matter? What do local officials do anyways?
  2. Holding municipal elections separately from larger races – state and national races that tend to get more attention – could lessen enthusiasm.
  3. Perhaps the candidates are not that exciting (the two mayoral candidates shared multiple characteristics) or they are unknown to broad swaths of the community.

Low voter turnout is now common and it may not take much to be voted in to local office. But if suburbanites claim to value local government, it is not hard to see the disconnect between choosing local leaders and wanting to maintain local control.

 

New apartments in the US also getting smaller

As the median size of new homes in the United States drops, so does the size of new apartment units:

According to a recent analysis of apartment sizes by RentCafe, newly built apartments, in general, are 5 percent smaller than those built 10 years ago. The average U.S. unit built in 2018 boasts 941 square feet, down roughly 52 square feet. According to the study, Chicago ranks third in the nation for the smallest average apartment sizes (a tie with Manhattan at 733 square feet).

Census Bureau data from 2017 on the median square footage of multifamily units suggests something similar with a drop from a peak in 2007.

Three quick responses:

  1. While the square footage is dropping, I assume the rental price has not dropped at the same rate. Fewer square feet for the same or a higher price?
  2. According to the same Census data, more multifamily units were constructed in 2017 than in any year in the table (going back to 1999). Do smaller units mean builders and developers can now squeeze in more units?
  3. This data from RentCafe is connected to a rise in microapartments. The Census data suggests the percent of multifamily units under 1,000 square feet has not increased over 10 years between 2007 and 2017.

So is there a significant trend toward smaller rental units? Maybe a small one that could be worth watching but it could take quite a bit of change for microunits to really be built in large numbers.

Building a 1,000+ foot skyscraper in a rural town of 7,000 residents

Skyscrapers and cities are tightly linked. Can one be built in a small town in the countryside?

Until a local company announced plans to send a 320-metre skyscraper soaring over the surrounding countryside, most people in Denmark had only the haziest idea where Brande, a town of 7,000 people in rural Jutland, even was.

The Bestseller Tower, designed by star architectural studio Dorte Mandrup, will not only be the tallest building in Denmark, but the tallest in western Europe, besting the Shard in London by a crucial 10.4 metres…

It won’t be the first rural skyscraper. At the height of Japan’s property bubble back in 1991, a 41-story residential tower, Sky Tower 41, was erected among fields.

But in Jutland, the surrounding landscape is so flat that the tower will be visible from 60km away. Visitors to Jelling, the royal seat of Harald Bluetooth, the Viking king who united Denmark, will see its slender form jutting up from the horizon, as will visitors to Legoland 30km away.

While the article suggests it will not be the only rural skyscraper in the world, they are certainly rare. They are rare enough outside of sizable central business districts that numerous tall buildings in the Chicago suburbs – probably in the 20 to 30 stories in height – attract attention as unusual and sticking out in the landscape in a metropolitan region that takes pride in its tall buildings and architecture.

It is certainly possible to build such a structure almost anywhere but I wonder how this will all work out in day-to-day life in this community. Small towns and rural areas have a particular scale that people are used to and that is human scaled or even dominated by nature and landscapes rather than human creations. Constructing a building over a 1,000 square feet disrupts all of this: it will be visible for miles, it will dwarf anything nearby, and it will cast shadows and block the sun from certain angles. It is not slightly out of scale for this community; it is a massive change. It could be beautiful, modern, and efficient and still have negative consequences for the community.