Let Cities Breathe: Sponge City Rainwater Harvesting Project in Kaifeng
Let Cities “Breathe”: Zhengzhou Yayuan Technology Empowers Sponge‑City Construction at Kaifeng Railway Station Square
Project Case: Rainwater Harvesting System for the Comprehensive Transport Hub Square of Kaifeng Railway Station
Project Background: A New‑Look Ancient City and Hub Upgrade
With the in‑depth advancement of the Zhengzhou‑Kaifeng Integration Strategy, the comprehensive transport hub project at Kaifeng Railway Station has become a key livelihood project to upgrade the city’s image and improve residents’ travel experience. This project covers not only a landscape urban living‑room square of approximately 19,700 m², but also supporting facilities including a large‑scale commercial complex, underground space and surrounding municipal roads.
Against such large‑scale infrastructure upgrading, one of the core considerations during the survey‑and‑design phase was solving the long‑standing urban problems of waterlogging in heavy rain and ponding in light rain, and realizing the recycled utilization of water resources.
Solution: Sponge‑City Concept & System Integration
As a key demonstration project of Zhengzhou Yayuan Rainwater Utilization Technology Co., Ltd., the square in front of Kaifeng Railway Station was built under the guidance of the sponge‑city philosophy. The overall survey and design were undertaken by Changsha Planning & Design Institute Co., Ltd., while Zhengzhou Yayuan Technology provided professional technical support for the rainwater harvesting system.
Given the heavy pedestrian flow and extensive hard‑paved areas of the square, Zhengzhou Yayuan Technology adopted a PP rainwater harvesting module system with the following core advantages:
- Efficient water storage for peak‑runoff regulation: High‑strength underground water storage tanks are assembled from PP modules to retain rainwater runoff from the square, relieve pressure on municipal drainage pipelines and lower urban waterlogging risks.
- Eco‑friendly material & water recycling: Made of acid‑ and alkali‑resistant polypropylene (PP), the modules are long‑lasting and will not contaminate stored water. After simple treatment, the harvested rainwater can be reused for square greening irrigation, road washing and landscape water replenishment, greatly saving freshwater resources.
Project Highlights: Station‑City Integration with Green Development as a Priority
The design of the landscape urban living‑room square fully implemented the sponge‑city principles: infiltration, detention, storage, purification, reuse and drainage. Yayuan’s rainwater harvesting system resolved the conflict between underground waterproofing and rainwater storage. Its modular assembly structure adapts to complex underground pipeline layouts, greatly shortening the construction period and cutting long‑term maintenance costs.
Compliant with Kaifeng’s sponge‑city construction specifications, the rainwater collection and reuse system integrates eco‑friendly concepts into the transport hub, delivering the goal of station‑city integration and green mobility.
Conclusion
The rainwater harvesting project for Kaifeng Railway Station Square marks another milestone project of Zhengzhou Yayuan Technology, following successful projects such as Shuanghehu Central Park in Zhengzhou Airport Economy Zone. Zhengzhou Yayuan will continue to deepen its footprint in the sponge‑city sector, delivering one‑stop solutions for rainwater resource utilization for more urban renewal projects with technological innovation.