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Although they are not a definitive solution, they offer a way to live more sustainably with the environment. China is at the forefront of this innovation, showing how the integration of nature into urban infrastructure can make a significant difference in the quality of life in cities.
Amid the challenges posed by climate change, China is adopting an innovative approach to make its cities more resilient to flooding. The concept of “sponge cities” is being implemented in various regions of the country, combining natural infrastructure with advanced engineering techniques.
What Are Sponge Cities?
Sponge cities are designed to absorb and reuse rainwater, reducing the risk of urban flooding. These cities utilize urban parks, such as the one in Nanchang, filled with native trees and volcanic rocks, to create an effective natural drainage system. The goal is to improve urban drainage and flood prevention while also creating a biologically diverse environment.
Biodiversity plays a crucial role in defending the Earth against climate change. Healthy cities, with forests and native plants, are essential for carbon dioxide absorption and supporting crop pollination. However, continuous urban expansion can lead to habitat loss and negatively impact global biodiversity.
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More than 6,000 trucks poured nearly 70,000 cubic meters of concrete without interruption for 72 hours to create the largest continuous concrete pour in history and erect a megaproject in Saudi Arabia.
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28-meter, 156-ton titans traveled 20,000 km from China to the port of Santa Catarina: Portonave received 7 fully electric megacranes, part of a R$ 210 million package, to double container handling.
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They exchanged the idea of a large house for a 35 m² warehouse, spent US$ 12,000 on the structure, and created a tiny house in Colorado with space to live and work.
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A newly opened terminal in the middle of the Amazon has begun transporting soy and corn through Amapá, eyeing the queue of ships that is congesting the ports in the South.
Implementation of Sponge Cities in China
In 2015, China launched a pilot program in 30 cities to promote the construction of sponge cities. Architects and engineers are reintegrating natural solutions, such as rain gardens and native trees, to complement the existing gray infrastructure. These solutions are inspired by ancient drainage systems that had already proven effective in stormwater management.
Despite the benefits, sponge cities face limitations; in 2021, the floods in Zhengzhou revealed that these systems have a limited capacity to absorb water. We can also say that the implementation of sponge infrastructure varies significantly from city to city due to climatic, hydrological, and socioeconomic differences.
Adaptation of Cities in the USA
In the United States, cities like Los Angeles and Boston are adapting the concept of natural infrastructure, using existing green spaces. They are experimenting with planting vegetation on sidewalks and creating green spaces in medians. According to Folha, flooding has increased in the U.S., and some incidents have even led to fatalities; in Brazil, it is no different, and we eagerly await innovations similar to those in China in our country.
