Rainwater harvesting systems has become an important choice for urban water resource management and sustainable development due to its multiple advantages. The core reasons include:
1.Alleviate water shortage: Collect rainwater for non-drinking water purposes such as greening irrigation, road washing, and toilet flushing, reduce dependence on municipal water supply and groundwater, and effectively save freshwater resources (savings of 10%-30%).
2.Alleviate urban waterlogging: By storing peak rainwater flow, reducing drainage network pressure, reducing surface runoff by 25%-40%, and significantly reducing the risk of waterlogging.
3.Reduce water pollution: Reduce rainwater from washing surface pollutants (such as TP, TN) into natural water bodies. Experimental data show that surface pollution can be reduced by more than 60%.
‌4. Improve the ecological environment‌: promote rainwater infiltration to replenish groundwater, alleviate the urban heat island effect, and maintain the balance of water circulation
5.Reduce municipal burden‌: reduce the construction and maintenance costs of drainage pipe networks and sewage treatment costs
6.Drive industrial development‌: promote the development of industrial chains such as green materials (such as PP polypropylene, carbon fiber), intelligent monitoring equipment, and create employment opportunities
The Rainwater harvesting systems has become a key solution to cope with water shortages and urban ecological challenges through resource recycling, disaster prevention and control, economic sustainability and technological innovation, especially suitable for high-density urbanized areas and water-scarce areas. With the popularization of intelligent technology and the strengthening of policies, its comprehensive benefits will be further highlighted