Creating an Ecological Water Supply and Drainage System in Guangyang Island, Chongqing
Wang Zhibiao, Vice President of the Environmental Engineering and New Energy Branch of Chongqing Municipal Design and Research Institute Co., Ltd., introduced that the water system on Guangyang Island adheres to the concept of "sponge city" in design, with the concept of "natural accumulation, natural infiltration, natural purification, and circular utilization" of rainwater. It utilizes existing slopes, ponds, and wetlands to store rainwater as miscellaneous water sources and improve the utilization rate of non-traditional water sources.
"The water supply and drainage system is divided into four parts: high-quality water supply, distributed rainwater, reused river water, and zero discharge sewage." Wang Zhibiao said that the drinking water on the island adopts an independent water supply system, using international standard edible grade stainless steel water supply pipes to ensure water supply safety. Distributed direct drinking water systems are installed in various building clusters to meet high-quality drinking water needs.
At the same time, the tail water of the river water source heat pump on Guangyang Island is treated by energy dissipation and cooling before being discharged into lakes and ponds for reuse, achieving "multiple uses of one water". It serves as a source of miscellaneous water and ecological replenishment for water systems, providing strong support for diversified water ecology, utilization of water resources, and vivid water scenery. He also introduced that Guangyang Island has achieved zero discharge of sewage to the environment by establishing a distributed sewage regeneration and utilization system. The internal digestion and resource utilization of sewage, as a supplement to traditional water sources, achieve a 100% recycling rate of sewage.