Architecture studio Turenscape, in collaboration with Arsomsilp Community and Environmental Architect, renaturalizes the site of a former tobacco factory into a new forest park serving the Khlong Toei district of Bangkok, Thailand.

Benjakitti Park transforms the pre-existing hard clay topsoil into a moist, spongy habitat, allowing for the replanting of a rich community of native plants, while also preserving the site's existing trees to create a sustainable ecosystem for all types of species to seek refuge in the big city.

The project developed by Turenscape acts as a sponge that retains rainwater with the aim of taking advantage of it and purifying it through the use of wetland plants. The interior of the park is connected by walkways, which function as a leisure space in which to enjoy the rich biodiversity of the environment.

The old materials that the site had before the intervention are reused as a base and water filtration layers, giving shape to different reliefs that give a dynamic character to the new public space. In addition, the old tobacco factories are renovated to convert them into various facilities buildings.

Parque forestal Benjakitti por Turenscape + Arsomsilp Community and Environmental Architect. Fotografía por Srirath Somsawat.

Benjakitti Forest Park by Turenscape + Arsomsilp Community and Environmental Architect. Photograph by Srirath Somsawat.

Project description by Turenscape

In the bustling urban heart of Bangkok, a former tobacco factory has been transformed into a low-maintenance regenerative system that is climate resilient, filters contaminated water and provides much-needed wildlife habitat. In addition, Benjakitti Forest Park now provides the largest public recreational space for residents of downtown Bangkok, and has become a new cultural symbol for the capital city. The project, completed at low cost on a compressed timeframe of just 18 months, offers a replicable modular approach to urban engineering that can transform lifeless, concrete-paved ground into a resilient living ecosystem that provides a full range of ecosystem services.
 

Parque forestal Benjakitti por Turenscape + Arsomsilp Community and Environmental Architect. Fotografía por Srirath Somsawat.
Benjakitti Forest Park by Turenscape + Arsomsilp Community and Environmental Architect. Photograph by Srirath Somsawat.

1. Site and challenges    
Bangkok is a densely populated city. The region experiences a monsoon climate with an average precipitation of about 1500 mm per year. The effects of global warming, has resulted in increased flood risk due to Bangkok’s low elevation. The 102-acre site was formerly a tobacco factory. The budget was limited and was overseen by the army that did not have extensive experience nor skills in building landscape projects.

2. Design objectives and strategies
In addressing the multiple challenges of the site, the project was envisioned as a central park capable of providing holistic ecosystem services to the city, including a demonstration of a nature-based solution for urban flood control, as well as providing badly needed public space for daily recreational activities and other cultural services. Three strategies guided our work to meet these objectives:

Parque forestal Benjakitti por Turenscape + Arsomsilp Community and Environmental Architect. Fotografía por Srirath Somsawat.
Benjakitti Forest Park by Turenscape + Arsomsilp Community and Environmental Architect. Photograph by Srirath Somsawat.

Reuse and recycle:All existing trees on site were preserved and integrated into the park design. Existing factory buildings were repurposed to house the sports center and museum. The demolished concrete materials were recycled for the earthwork foundation and paving.

Creating porosity and wetlands:Cut-and-fill techniques were used to transform the impermeable, concrete-paved ground into a spongy and porous landscape of wetlands dotted with islets, which is expected to retain up to 200,000M3 of storm water from the surrounding area during the monsoon season. This tilled landscape also transformed the otherwise hard clay surface soil into wet and spongy habitat, allowing a rich native plant community to establish itself with minimal irrigation or maintenance needed during the dry season. This modular landscape can be easily executed with a single excavator and minimizes dependence on skilled labor.

Parque forestal Benjakitti por Turenscape + Arsomsilp Community and Environmental Architect. Fotografía por Srirath Somsawat.
Benjakitti Forest Park by Turenscape + Arsomsilp Community and Environmental Architect. Photograph by Srirath Somsawat.

Fostering a low-maintenance “Messy Nature”:The modulated landform with diverse micro-environments was sown with seeds and planted with tree seedlings, creating a foundation for the subsequent evolution of a semi-natural plant community creating a new, highly dynamic and diverse aesthetic that sharply contrasts with the surrounding urban landscape.

Creating immersive places for people:Multiple boardwalks and a skywalk were designed that tie together the entire park and create a unique immersive experience amidst the tropical foliage. 

Parque forestal Benjakitti por Turenscape + Arsomsilp Community and Environmental Architect. Fotografía por Srirath Somsawat.
Benjakitti Forest Park by Turenscape + Arsomsilp Community and Environmental Architect. Photograph by Srirath Somsawat.

3. Performance
Benjakitti Forest Park, though built in short period of time, has demonstrated a great success.  In the last summer, most of Bangkok city was flooded but not this park and its vicinity.  The water remediating wetland performs well and produces enough water to keep the wetland survive the dry season. 91 species of birds were seen in this rewilded urban nature. This green lung has truly become the largest central park for the densely populated Bangkok and attracts tens of thousands of visitors daily who uses it for all kinds of recreational activities. It was celebrated as the new icon for the capital city. 

More information

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Architects
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Project team
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Dong WANG, Project Manager and Senior Urban Planner. Wei LIU, Landscape Architect. Baiqiang REN, GIS Analyst and Water treatment Engineer. Liang HE, Landscape Architect. Yanjin BAI, Landscape Architect. Jiin-yi HWANG, Senior Architect. Yujie. LIU, Senior Urban Planner. Kening PAN, Senior Landscape Architect. Lelai DAI, Landscape Architect. Defeng LU, Landscape Architect. Xiaodong LI, Landscape Architect. Chang YANG, Landscape Architect. Xianfeng HE, Landscape Architect. Qiong ZHENG, Landscape Architect. Wenjing YUE, Landscape Planner. Boxun YUAN, Architect.

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Collaborators
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Landscape Architects.- Arsomsilp Community and Environmental Architect Co., Ltd.
Design Consultants.- Turenscape.
Structure Engineers.- Kasem Design and Consultant Co., Ltd.
Mechanical and Electrical Engineering.- Optimology Co., Ltd.
Construction Managers.- Stonehenge Inter Public Company Limited.

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Builder
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Royal Thai Army - 1st Development Division.

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Area
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414,400 sqm.

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Dates
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December 2019 to March 2022.

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Location
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Khlong Toei, Bangkok. Thailand.

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Manufacturers
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LIGHTING SYSTEM .-
Pole Light.- Lekise.
In-ground Uplight.- Lekise.
Bollard Light.- L&E.
Flood Light.- Lekise.
LED Strip Light.- L&E.
Downlight with Tree Strap.- Lekise.
GREEN TECHNOLOGY.-
Transparent Acrylic Sheet.- SCG.
IRRIGATION SYSTEM.-
Irrigation Equipment.-  1. Rainbird  / 2. Hunter / 3. Spica.

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Photography
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Srirath Somsawat.

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Kongjian Yu has been called the “Olmsted of China,” a reference to Frederick Law Olmsted, the influential founder of the landscape architecture profession in the United States and best known as the co-designer of New York City’s Central Park.  However, Yu describes himself as a “peasant’s son” who was born in 1963 and raised in Dong Yu village in Jinhua, Zhejiang Province, which had a population of less than 500 people, a place he called a paradise. It is where the White Sand Creek flows down from the mountain through 36 weirs, which help facilitate crop irrigation, and into the Wujiang River. When the monsoon season-related flooding came, he says, the whole village would get excited because carp would swim up the creek from the Wujiang River to spawn, going over the low weirs, and into the fields and rice paddies where they were caught.  

“Yu’s journey from farming in a remote Chinese village to international preeminence in landscape architecture traces an extraordinary odyssey,” wrote William Saunders in the book Designed Ecologies: The Landscape Architecture of Kongjian Yu, (2012). “[D]uring the 1966 to 1976 Cultural Revolution … [h]e grew up near an enchanting forest and a fish-filled creek, only to see the forest cut down and the creek become too polluted to support life. This helps explain the depth of his commitment to recreating and protecting natural abundance. He suffered social ostracism in the countryside for having wealthy ancestors and then for being a ‘country bumpkin’ when he made it to the big city. This helps us understand his conviction that parks are to be enjoyed by all ranks of people. He loved farming and was proud that his commune used every square meter of its land productively. This helps explain his revulsion to landscapes that are ‘merely’ ornamental. He learned how to deploy scarce water resources and cultivate crops in ways that ensured their survival. And this helps us understand his will to create parks that are low-maintenance and ‘productive.’”

In 1978 Deng Xiaoping reversed the policies that barred children of the landlord class from going to school. Within two years, according to Oberlander Prize Curator John Beardsley’s essay in Designed Ecologies, Yu was the “only one of three hundred in his county’s secondary school to pass university entrance exams [and] he was admitted to Beijing Forestry University in 1980. Because his examination score was higher than that required for forestry, he was invited to enroll in the landscape gardening program, which he recalls as the only university program in the field at the time in China.” He earned a Master’s degree in 1987.

Yu cites three events as being influential. In 1972, the year that U.S. President Richard Nixon came to China, his village used newly available pesticides for the first time. The use of DDT resulted in a massive fish kill and the sickening of people who consumed the contaminated fish since no one knew the pesticide was poisonous. A year later he fell into the monsoon swollen creek and nearly drowned. He caught hold of an overarching branch of one of the stream’s many willows; the trees and other volunteer vegetation slowed the current. In the 1980s concrete dams, culverts, pipes, and other so-called “grey infrastructure” were constructed throughout China, which severely disrupted the natural flow of the local waterways, eradicated trees and vegetation (the sort that saved him from drowning), and altered finely calibrated irrigation networks, including in his own village. In a recent interview Yu said “The destruction of my own paradise is what makes me think that we need a revolution”; at the core of that revolution is the “sponge cities” concept.

After Yu received a Doctor of Design Degree, he practiced with the SWA Group in Laguna Beach, CA, before returning to China in 1997. His pioneering research on Ecological Security Patterns (1995) and Ecological Infrastructure, Negative Planning, and Sponge Cities (2003) has been adopted by the Chinese government (2014) as a guiding theory for nationwide ecological protection and restoration campaigns. He created Peking University’s landscape architecture department, which started with three students and has graduated more than 1,200 master’s and doctoral students. He helped shift Chinese national-level policies from economic development-centered urbanism toward ecologically prudent urbanism through numerous letters to top Chinese leaders and more than 600 lectures to mayors, ministers, and almost all ranks of Chinese officials; numerous media appearances; and as a leading member of several national expert committees, including vice president of the Society of Urban Studies.

Yu is the founder and leads the Graduate School of Landscape Architecture and the College of Architecture and Landscape Architecture at Peking University. He is also the founder and principal designer at the landscape architecture firm Turenscape, which today numbers more than 500 employees. The firm’s name combines the characters “Tu,” which means dirt, earth, or the land, and “Ren,” which means people, man, or human being.  “Turen … means earth man, a relationship between land and people. The firm’s philosophy is to create … harmony between land and people and … sustainable environments for the future.” Yu received a Doctor of Design Degree from Harvard’s Graduate School of Design (1995) and is the author of more than twenty books and the founder and chief editor of the internationally awarded magazine Landscape Architecture Frontier. He has been an invited lecturer, speaker, and guest professor around the world; he and his firm’s projects have received numerous awards.

For more than 25 years, he has spent his career fighting against deteriorating urban ecologies and transforming and stewarding the natural and cultural environment. His work has significantly elevated the role of design in the process, and what landscape architects can provide in designing large-scale nature-based solutions for the public’s benefit and enjoyment. To date Yu and his firm have some 600 built projects in more than 200 cities, principally in China, but also in Thailand, and the U.S.
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Published on: February 19, 2025
Cite: "Benjakitti Forest Park by Turenscape + Arsomsilp Community and Environmental Architect" METALOCUS. Accessed
<http://www.metalocus.es/en/news/benjakitti-forest-park-turenscape-arsomsilp-community-and-environmental-architect> ISSN 1139-6415
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