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Posts Tagged ‘stormwater’

Photo: Stephanie Hanes/The Christian Science Monitor.
A jogger runs on a path in Babcock Ranch, Florida, on Nov. 3, 2022. Babcock Ranch, which calls itself America’s first solar-powered town, survived Hurricane Ian with little to no damage.

When does the bottom line get in the way of building something to last? Too often.

But there are always outliers. At the Christian Science Monitor, I learned recently about housing developers in Florida who give “careful consideration of how the built environment will respond to an increasingly harsh climate.”

Stephanie Hanes writes, “As Hurricane Ian moved toward Florida’s west coast in late September, Amy Wicks drove around this rapidly growing community, trying to figure out what she hadn’t thought of yet. She checked for any debris that might be blocking water runoff paths; she took note of the restored wetlands; she hoped that no alligators had taken up residence in the drain pipes.

“Eventually, she returned to her own home here, hunkered down with her husband and three children, and listened as freight train winds moved over Babcock Ranch, a 4-year-old planned community some 20 miles inland from Fort Myers. At that point, she says, she could only hope that the unique storm water system she had designed and monitored over the past decade would be up for the task. …

“The storm sat overhead for nearly 10 hours, dumping more than a foot of rain on this swath of old Florida cattle ranches and newly built cul-de-sacs.

“By the time it subsided, it was clear that something extraordinary had taken place in Babcock Ranch. Created as a sort of laboratory for green development in Florida, and intentionally designed to survive extreme weather, the town proved remarkably resilient in the face of a Category 4 hurricane.

“Unlike surrounding areas, it did not flood, in large part because of Ms. Wicks’ years of planning and her unique stormwater management design that mimicked natural systems rather than fighting them. It did not lose power, thanks not only to its 700,000-panel solar grid and battery backup system, but also to the power line hardening developers undertook with their utility provider, Florida Power and Light. And because Babcock Ranch owns and operates its own water plant, which also survived the storm, it was the only town in Charlotte County that did not go under a boil-water alert. …

“Across the state, there is a small but growing effort to build more resilient communities in Florida – an effort to shift a yearslong pattern of rapid development that many here say exacerbates water shortages and other environmental risks. …

“With a constant flow of new homebuyers – an average of nearly 1,000 people move to Florida each day, according to oft-repeated state statistics – developers have tried to acquire as much land as possible, and as quickly as possible. That often means buying up faded ranches or long-ignored swaths of swamps and forest – green-covered lands that must be flattened and cleared to make way for housing developments and roads and shopping centers.

“Indeed, to meet building codes that require homes to be graded above street level, developers will typically bulldoze the landscape, dig storm ponds, and then use the fill from those holes to prep building sites, explains Timothee Sallin, co-CEO of Cherrylake, a landscape company working across the Southeast that has become a leader in sustainable design.

“Traditionally, developers would replant that denuded landscape with the types of species that outsiders tend to think about when they imagine Florida – green St. Augustine grass, colorful azaleas, draping bougainvillea. The problem, Mr. Sallin says, is that these plants aren’t native to the state, so they require a lot of inputs to stay healthy, such as water, fertilizer, and pesticides. They also struggle to thrive in soil devoid of organic material and nutrients.

“ ‘The developers have to mass grade a site to build efficiently and economically,’ he says. ‘The most efficient thing to do is to raze it and bring in fill. But that creates soils that are difficult to work with.’

“Meanwhile, because the natural topography of the land has been erased, and the natural water collection systems of wetlands and marshes eliminated, the man-made drainage system becomes the only way to capture water. This can be a problem in some storms – particularly those with unusually heavy rains thanks to climate change.

“All of this, says [Jennison Kipp, a resource economist with the University of Florida and the state coordinator for Sustainable Floridians] creates a system without resilience, suffering from both too much and too little water. ‘The landscapes are on life support,’ she says. …

“According to the state’s central water authority, the region will face a 235 million gallon a day shortfall by 2035 unless demand and usage patterns change. This is one of the reasons why when 27,000 acres of ranch land came up for development just south of Orlando – part of a 300,000 acre swath owned by the Church of Jesus Christ of Latter-Day Saints – executives at the development company Tavistock decided to approach the project differently. …

“To plan Sunbridge, which is about two-thirds the size of Washington, D.C., [Clint Beaty, senior vice president of operations for Tavistock and the lead on the Sunbridge project] and others at Tavistock coordinated with representatives from the University of Florida’s Institute of Food and Agricultural Sciences, the Sustainable Floridians, and other groups. They came up with a plan to use native landscaping – even eschewing the popular St. Augustine grass for the more drought and heat resilient (although occasionally browner) Bahia grass. They are saving and relocating some of the old live oak trees on the property. All of the new homes will be wired for solar panels and electric vehicle plug-ins, and one model house version boasts Tesla solar shingles and a battery backup system.

“Meanwhile, to help move away from fertilizers, scientists have built a living laboratory along a walking path at the development’s community center, called Basecamp, where they are testing the viability of different species of native plants as well as different sorts of compost amendments to soil and the impact on pollinator species. Mr. Beaty is also working to figure out how to arrange for large scale composting and food-waste recycling for the community.”

More at the Monitor, here. No firewall. Subscriptions welcome.

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Photo: Philadelphia Water Department
A rain garden manages stormwater runoff in Philadelphia’s Germantown section. 

When I was at the magazine, I solicited several articles about Philadelphia and what people there were doing to bring more of the natural environment into urban living. It’s not easy for any city as budgets are often strained. But when you can make the case that environmental improvements ultimately save costs (or when an EPA is serious about quality of life), you have a better chance of getting things done.

Bruce Stutz at Yale Environment 360 (a great publication I recommend following on twitter @yaleE360) has the story.

“Benjamin Franklin, Philadelphia’s favorite son, described his city’s stormwater problem well: By ‘covering a ground plot with buildings and pavements, which carry off most of the rain and prevent its soaking into the Earth and renewing and purifying the Springs … the water of wells must gradually grow worse, and in time be unfit for use.’

“When he wrote this in 1789, many of Philadelphia’s water sources, the scores of streams that ran into the Schuylkill and Delaware rivers, were already cesspools of household and industrial waste. As they became intolerable eyesores and miasmic health hazards, the city simply covered them with brick arches, turned the streams into sewers, and on top constructed new streets, an expanding impervious landscape that left the rains with even fewer places for ‘soaking into the Earth.’

“Crude as it was, this network of underground-to-riverfront outfalls through ever-larger pipes was pretty much the way Philadelphia and other U.S. cities coped with their stormwater for the next 200 years.

“But Ben Franklin’s town has decided to take the lead in undoing this ever-more costly and outdated system that annually pours huge volumes of polluted stormwater runoff and untreated sewage into the Delaware and the Schuylkill. Instead of building more and bigger sewers and related infrastructure, Philadelphia has adopted a relatively new paradigm for urban stormwater: Rather than convey it, detain it — recreate in the urban streetscape the kinds of pervious places where, instead of running into surrounding waterways, rainfall and the contaminants it carries can once again soak into the earth.

“The city is now in the seventh year of a 25-year project designed to fulfill an agreement with the U.S. Environmental Protection Agency (EPA) to reduce by 85 percent Philadelphia’s combined sewer overflows. … Rather than spending an estimated $9.6 billion on a ‘gray’ infrastructure program of ever-larger tunnels, the city is investing an estimated $2.4 billion in public funds — to be augmented by large expenditures from the private sector — to create a citywide mosaic of green stormwater infrastructure. …

“At nearby Villanova University, the Urban Stormwater Partnership, founded in 2002 under environmental engineering professor Robert Traver, had begun experimenting with green stormwater infrastructure. [Howard Neukrug who served as the city’s water department commissioner from 2011 to 2015] developed a couple of low-impact pilot design projects, and in 2009, the Philadelphia Water Department released a revision — 12 years in the making — to its stormwater and sewage management plan….

The city is working now to standardize the construction of green infrastructure and monitor its effectiveness. Costs are coming down as green infrastructure becomes more widely adopted. …

“As the Water Department’s planners expand the network of greened acres, they are bringing social, economic, and environmental investment to often marginalized neighborhoods. [Marc Cammarata, the Water Department’s deputy commissioner of planning and environmental services] says that green stormwater infrastructure projects now support 430 jobs. … Residents already report that green infrastructure projects have reduced crime as green spaces proliferate, says Cammarata.

The Water Department’s website map is crowded with green infrastructure sites across the city. Visitors can zoom in on their neighborhood and see what’s there.”

More here.

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