Rainwater Harvesting System The cost of rainwater harvesting systems has, over the years, been affected by outdated rainwater management concepts, incomplete policies and regulations,

unscientific planning and design methods, lack of advanced theoretical guidance, and inadequate management measures. This has resulted in rainwater drainage construction in most cities

in China lagging severely behind urban development, leading to frequent urban waterlogging. Urban stormwater management is currently limited to individual projects in more developed

areas such as Beijing, Shanghai, and Shenzhen, and has not yet formed a systematic urban stormwater management framework. Research on urban stormwater management from the

perspective of the ecological service functions of green infrastructure is still insufficient. Adjusting climate, purifying indoor air, rooftop rainwater harvesting system The cost of rainwater

harvesting systems enhances urban landscaping, prevents stormwater disasters, and utilizes and develops precipitation. Road surface precipitation residues are abundant, and sources of

air pollutants are complex. After initial diversion and rough filtration, sedimentation is still required before it can be discharged into the storage system. This allows the rainwater in the

reuse pump to flush the pipeline of the plastic modular assembled reservoir,

disturbing the sediment settled at the bottom of the plastic modular assembled reservoir. Then, by activating the sewage pump, the turbid rainwater is discharged into the downstream

municipal sewage network. The buried integrated treatment room is also equipped with a sewage pump, which can remove impurities filtered by the filter. Rooftop rainwater harvesting

system The cost of rainwater harvesting systems To prevent the impermeable geomembrane from being punctured by sharp objects such as surrounding stones, which would affect the

reservoir's impermeability, the plastic modular assembled reservoir should be wrapped with polystyrene boards before backfilling with soil. Figure 4-78

shows a schematic plan of the plastic modular assembled reservoir.

Balancing the water resource ecosystem to achieve the goal of green building. In the rainwater resource system of residential communities,

the accumulation and pollution levels of rainwater vary significantly across different regions. Therefore, community rainwater can be categorized into rooftop rainwater, surface

rainwater, initial rainwater, and non-initial rainwater. For rainwater with lighter pollution from roofs, squares, roads, and

green spaces, it can be recycled and reused; for heavily polluted rainwater