New research from the University of Delaware’s A.R. Siders and Katharine Mach, from the University of Miami, found that managed retreat can’t be seen as a last resort — it must be paired with existing (flood walls) or future (floating cities) measures to be effective.
CREDIT: Jeffrey C. Chase/ University of Delaware
University of Delaware disaster researcher A.R. Siders said it’s time to put all the options on the table when it comes to discussing climate change adaptation.
Managed retreat — the purposeful movement of people, buildings and other assets from areas vulnerable to hazards — has often been considered a last resort. But Siders said it can be a powerful tool for expanding the range of possible solutions to cope with rising sea levels, flooding and other climate change effects when used proactively or in combination with other measures.
Siders, a core faculty member in UD’s Disaster Research Center, and Katharine J. Mach, associate professor at the University of Miami Rosenstiel School of Marine and Atmospheric Science, provide a prospective roadmap for reconceptualizing the future using managed retreat in a new paper published online in Science on June 17, 2021.
“Climate change is affecting people all over the world, and everyone is trying to figure out what to do about it. One potential strategy, moving away from hazards, could be very effective, but it often gets overlooked,” said Siders, assistant professor in the Joseph R. Biden, Jr. School of Public Policy and Administration and the Department of Geography and Spatial Sciences. “We are looking at the different ways society can dream bigger when planning for climate change and how community values and priorities play a role in that.”
Retreat does not mean defeat
Managed retreat has been happening for decades all over the United States at a very small scale with state and/or federal support. Siders pointed to Hurricanes Harvey and Florence as weather events that caused homeowners near the Gulf of Mexico to seek government support for relocation. Locally, towns such as Bowers Beach, near the Delaware coast, have used buyouts to remove homes and families from flood-prone areas, an idea that Southbridge in Wilmington is also exploring.
People often oppose the idea of leaving their homes, but Siders said thinking seriously about managed retreat sooner and in context with other available tools can reinforce decisions by prompting difficult conversations. Even if communities decide to stay in place, identifying the things community members value can help them decide what they want to maintain and what they purposely want to change.
“If the only tools you think about are beach nourishment and building walls, you’re limiting what you can do, but if you start adding in the whole toolkit and combining the options in different ways, you can create a much wider range of futures,” she said.
In the paper, Siders and Mach argue that long-term adaptation will involve retreat. Even traditionally accepted visions of the future, like building flood walls and elevating threatened structures, will involve small-scale retreat to make space for levees and drainage. Larger-scale retreat may be needed for more ambitious transformations, such as building floating neighborhoods or cities, turning roads into canals in an effort to live with the water, or building more dense, more compact cities on higher ground.
Some, but not all these futures currently exist.
In the Netherlands, the municipality of Rotterdam has installed floating homes in Nassau harbor that move with the tides, providing a sustainable waterfront view for homeowners while making room for public-friendly green space along the water. In New York City, one idea under consideration is building into the East River to accommodate a floodwall. Both cities are using combination strategies that leverage more than one adaptation tool.
Adaptation decisions don’t have to be either/or decisions. However, it is important to remember that these efforts take time, so planning should begin now.
“Communities, towns, and cities are making decisions now that affect the future,” said Siders. “Locally, Delaware is building faster inside the floodplain than outside of it. We are making plans for beach nourishment and where to build seawalls. We’re making these decisions now, so we should be considering all the options on the table now, not just the ones that keep people in place.”
According to Siders, the paper is a conversation starter for researchers, policymakers, communities and residents that are invested in helping communities thrive amid changing climate. These discussions, she said, shouldn’t focus solely on where we need to move from, but also where we should avoid building, where new building should be encouraged, and how we should build differently.
“Managed retreat can be more effective in reducing risk, in ways that are socially equitable and economically efficient, if it is a proactive component of climate-driven transformations,” said Mach. “It can be used to address climate risks, along with other types of responses like building seawalls or limiting new development in hazard-prone regions.”
Globally, Siders said the U.S. is in a privileged position, in terms of the available space, money and resources, relative to other countries facing more complicated futures. The Republic of Kiribati, a chain of islands in the central Pacific Ocean, for example, is expected to be under water in the future. Some of its islands already are uninhabitable.
The Kiribati government has bought land in Fiji for relocation and is developing programs with Australia and New Zealand to provide skilled workforce training so the Kiribati people can migrate with dignity when the time comes. Challenges remain, though, since not everyone is on board with moving.
In a recent special issue of the Journal of Environmental Studies and Sciences, edited and introduced by Siders and Idowu (Jola) Ajibade at Portland State University, researchers examined the social justice implications of managed retreat in examples from several countries, including the U.S., Marshall Islands, New Zealand, Peru, Sweden, Taiwan, Austria and England. The scientists explored how retreat affects groups of people and, in the U.S., specifically considered how retreat affects marginalized populations.
So, how can society do better? According to Siders, it starts with longer-term thinking.
“It’s hard to make good decisions about climate change if we are thinking 5-10 years out,” said Siders. “We are building infrastructure that lasts 50-100 years; our planning scale should be equally long.”
Original Article: Managed retreat: A must in the war against climate change
More from: University of Delaware
The Latest Updates from Bing News & Google News
Go deeper with Bing News on:
War against climate change
- Poles mark 1944 revolt against Nazis; compare it to Ukraine
Poles on Monday marked the 78th anniversary of the Warsaw Uprising, a doomed 1944 revolt against Nazi German forces, with some ...
- In first Alaska visit, French ambassador talks climate change, Russia and the case of the missing French sled dog
It’s Ambassador Philippe Etienne’s first trip to the state, and, on his first day in Anchorage, he had not yet seen any of the city’s charismatic mega-fauna. But Etienne has been meeting with state ...
- Climate Change is Putting Women & Girls in Malawi at Greater Risk of Sexual Violence
It is often those least responsible for causing climate change that suffer the most from the impacts. And such is the case with women and girls in Malawi – one of the world’s poorest and lowest carbon ...
- Amid Ukraine war, gap between nuclear weapon haves and have-nots needs urgent attention
The NPT Review Conference should address concerns over the failure of nuclear weapon states to make progress on disarmament A new treaty, which aims at the complete elimination of nuclear weapons, ...
- Floods, fires and why football can play a big role in tackling climate change
Football is a significant contributor to climate change, but it can also play a big role in helping to tackle the global crisis ...
Go deeper with Google Headlines on:
War against climate change
Go deeper with Bing News on:
Climate change adaptation
- Climate change will make it harder for world’s poorest to migrate, study says
Climate change will make it harder for the world’s poorest people to migrate – leaving them “extremely vulnerable” to continued impacts and increased poverty, new research finds.
- Higher Demand For Air Conditioning Could Further Affect The Climate
Increasing demand for air conditioning is outpacing supply. This rise in AC use will also affect the climate, which could lead to more heatwaves.
- Carmel to consider climate adaptation, action plans
At its regular meeting Tuesday night, the Carmel City Council will consider a pair of Climate Adaptation and Action Plans that, if adopted, would establish a roadmap to reduce local greenhouse gas ...
- Women are turning the tide on climate policy worldwide, and may launch a new era for Australia
From Barbados to Finland, we’ve seen women’s leadership on climate bring fair, innovative and ambitious policies.
- Climate Finance and Geostrategic Interests in the Pacific
Foreign investment in climate adaptation in the Pacific Islands will be key to sustainable development and security in Asia.