New York City to implement infrastructure program that would convert public surfaces into floodwater sponges

2022-10-13T13:44:00-04:00

Most of New York City — more than 70% — can’t absorb rain due to all its concrete and pavement. This often leaves water falling from the sky with no place to go, leading to catastrophic and deadly flash floods. These calamities are especially common during cloudbursts, defined as a sudden but brief concentrations of heavy precipitation that typically accompany unusually hot weather, such as summer thunderstorms. Scientists expect the problem to worsen with climate change.

In response, the New York City Department of Environmental Protection has recently proposed an array of stormwater resilience strategies. One such plan is the Cloudburst Management plan, which will utilize a combination of grey infrastructure, such as sewer pipers and underground storage tanks, and green infrastructure, like trees and rain gardens, to absorb, store, and divert stormwater. Public locations, such as playgrounds and basketball courts, would double as temporary holding tanks.

This graphic shows a basketball court that would absorb water through a porous pavement during storms. Image: NYC DEP

This strategy aims to assist the city’s 150-year-old sewer system, which can only handle 1.75 inches of rain per hour. As reported by Gothamist, the technologies used for cloudburst management could handle up to 2.3 inches of hourly rainfall. New York City is funding the initiative with municipal and federal money from the likes of FEMA’s Building Resilient Infrastructure and Commun...

Porous interventions to adapt to increasing floods in Bangkok

2018-03-05T16:12:00-05:00

Sea level rise and increased rain have posed serious flood risks for Bangkok, the capital city of Thailand, which is already close to sea level. [...] She works to do this by reclaiming urban porosity through a network of public green spaces. [...] She has already been planning and working on projects beyond climate resilient housing - including rain gardens, green roofs, permeable parking, urban forests and farms - to address the root causes of increased flooding in her city.

After witnessing a dramatic economic boom and rapid urbanization—and subsequent environmental challenges—in her native Thailand, Harvard graduate, landscape architect and TED fellow Kotchakorn Voraakhom founded Porous City Network to fight the increased risk of flooding with design solutions and improve urban resilience and adaptability in Bangkok, primarily in the city's most vulnerable communities: "PCN makes the city porous by transforming underused impervious surfaces into a system of productive public green spaces, and advocating maintaining threatened landscape infrastructure like agricultural land, canals, and ditch orchards, which help mitigate excess water."

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New York City to implement infrastructure program that would convert public surfaces into floodwater sponges

Porous interventions to adapt to increasing floods in Bangkok