The main concept of this project is based on “bringing nature back into the heart of a commercial space,” where architecture is not merely a luxurious shell, but an active participant in natural cycles.
At the center of the complex, a large atrium with a lattice roof is designed to channel natural light and collect rainwater. The rainwater gathered from the roof flows through vertical water features into the central pool, creating a calming visual experience while also being reused for the irrigation of the indoor landscape and the building’s water management system.
This continuous flow of water not only reduces dependence on urban water resources, but also helps regulate the indoor microclimate, improves humidity levels, and creates the atmosphere of a contemporary urban garden. The integration of light, water, and greenery transforms the shopping experience into a unique sensory journey.
In this project, rainwater is not treated merely as a functional element, but as a defining part of the architectural identity — expressing sustainability through space, light, and movement.
The Rain Atrium is conceived around the idea of bringing nature back into the heart of a commercial environment, where architecture functions not merely as a luxurious enclosure, but as an active participant in natural ecological cycles.

At the center of the complex lies a grand atrium crowned by a lattice roof designed to maximize natural daylight while harvesting rainwater. Collected water is guided through a series of vertical water features before cascading into a central reflecting pool, creating a dynamic and calming visual experience. This harvested rainwater is then reused for irrigating the indoor landscape and supporting the building’s water management system.

The continuous movement of water serves multiple purposes beyond aesthetics. It reduces reliance on municipal water resources, contributes to indoor climate regulation, enhances humidity levels, and fosters the atmosphere of a contemporary urban garden. The careful integration of natural light, flowing water, and lush greenery transforms the shopping environment into an immersive sensory experience.

In this project, rainwater is elevated beyond its functional role to become a defining element of the architectural identity. Through the interaction of space, light, movement, and nature, the Rain Atrium expresses a vision of sustainability that is both experiential and deeply integrated into the design itself.

2025

From a technical perspective, the project is designed around an integrated rainwater harvesting and environmental control system, expressed directly through the central atrium section.
The roof structure is shaped as a large-span lattice canopy that guides rainwater toward the central oculus. This geometry allows water to be naturally collected through gravity and directed into a vertical water column positioned at the core of the atrium. The falling water acts as both an environmental feature and a passive cooling element within the space.
Beneath the central pool, an underground technical reservoir is integrated into the structural foundation system. Rainwater is filtered and stored in this lower tank, where mechanical pumps and circulation systems redistribute the water back to the overhead discharge system, creating a continuous closed-loop cycle. Excess water is redirected into secondary storage and irrigation networks for the landscape areas.
The water body also contributes to the building’s microclimate performance. Evaporative cooling from the central pool helps reduce ambient temperature within the atrium, while the open skylight above supports stack ventilation by allowing warm air to rise and escape naturally. Combined with daylight penetration through the roof opening, the system reduces dependency on artificial lighting and mechanical cooling during daytime operation.
Structurally, the circular basin acts as both an architectural centerpiece and a concealed service zone housing filtration equipment, drainage channels, and maintenance access. The stepped landscape surrounding the pool creates informal seating areas while integrating planted zones that benefit from recycled rainwater irrigation.
Overall, the section demonstrates how environmental sustainability, water management, structural logic, and spatial experience are merged into a single architectural system rather than treated as separate components.

Mehdi Nasiri, Pariya Hendi

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Mehdi Nasiri

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