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Harnessing Rainwater with Waterfalls in a High-Rise Community

Authors:
Jian Wang, Luyuan Yan, Zhixuan Zhu, Xing Liu
Harnessing Rainwater with Waterfalls in a High-Rise Community
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Rainwater cascades through integrated waterfalls in a super high-rise community, utilizing gravitational energy to generate clean electricity while providing sustainable living spaces for local residents.
5 key facts about this project
01
Rainwater collection system captures up to 1,035,000 cubic meters annually.
02
Integrated waterfalls create a visually dynamic façade.
03
The building stands at 960 meters, enhancing vertical living.
04
Designed to generate clean energy through hydroelectric systems.
05
Encourages local biodiversity with vegetation incorporated into the structure.

The Energy Stepwell project is located in Cherrapunji, Meghalaya, India, a region known for its heavy rainfall and rich green landscapes. The design aims to tackle two significant issues: climate change and energy poverty. A super high-rise building will serve as both a place for people to live and a facility for generating clean energy. By utilizing the abundant rainwater, the design intends to create a self-sufficient environment that provides reliable electricity while supporting the local ecosystem.

High-Rise Design

The building reaches a height of 960 meters, with a residential section positioned at 487 meters. It accommodates around 3,200 households across 80 floors, resulting in a total living area of about 256,000 square meters. This vertical design addresses the need for housing in a compact space. It incorporates residential units with practical energy solutions, making efficient use of the site's geography.

Hydrological Integration

A key feature is the advanced rainwater collection system built into the structure. This system is designed to efficiently capture rainwater falling on the building, with an estimated annual collection of up to 1,035,000 cubic meters. This harvested rainwater is essential for producing hydroelectric power. The energy generated will be used to meet the electricity needs of residents for lighting and cooling, helping to reduce dependency on less sustainable energy sources.

Ecological Considerations

The design integrates natural elements into the building’s façade, including waterfalls and greenery. This green facade not only adds visual interest but also helps support local biodiversity. By bringing nature close to the living space, the project encourages a balance between the built environment and the natural world. This focus on sustainability fits well with the aim of creating a resilient and eco-friendly community.

Functional Layers

The project is organized into multiple functional layers, incorporating systems for electricity storage, sewage treatment, and hydroelectric generation. Each layer serves a specific purpose, working together to support energy production and ecological health. This structured approach reflects a thoughtful response to community needs, showing a commitment to both human well-being and environmental responsibility.

The design features rainwater cascading down built-in waterfalls, enhancing the connection between water and architecture while highlighting the project’s dedication to sustainability.

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The Buildner’s Unbuilt Award 2025: Celebrating Architectural Creativity and Visionary Unbuilt Designs with a Total Prize Fund of €100,000

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The Buildner’s Unbuilt Award 2025 is an international architecture competition dedicated to recognizing and celebrating the value of unrealized architectural designs. It invites architects, designers, and students worldwide to submit visionary projects that have not yet been constructed, highlighting the power of ideas and the creativity behind the design process. By focusing on unbuilt work, the competition aims to bring forward concepts that shape the future of architecture and push the boundaries of the profession. 

Participants can compete in three categories based on project scale: Small Wonders (up to 100 m²), Medium Marvels (101–999 m²), and Large Visions (over 1,000 m²). Each category winner will receive €20,000, and additional prizes include honorable mentions, student awards, and a special Best Presentation Award. Winning projects will gain significant international exposure through Buildner’s publicity campaign and a feature article on ArchDaily, providing a unique opportunity to showcase creative ideas to a global audience. 

The Buildner’s Unbuilt Award 2025 encourages entrants to submit any type of unbuilt project, from conceptual visions to detailed designs, celebrating bold innovation without the constraints of realization. Important deadlines: registration closes on October 30, 2025; submissions are due by November 20, 2025; winners will be announced on December 17, 2025.

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Celebrating your unbuilt architecture visions with a €100,000 prize

100,000€ Prize / 2025 ideas COMPETITION
Prize 100,000 €
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Final registration deadline 30 October 2025

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