Urban heat island effect: Due to the dense urban buildings, asphalt roads and concrete roads have a larger heat absorption rate and a smaller specific heat capacity than the soil vegetation in the suburbs. At the same time, the temperature in urban areas is generally higher than that in surrounding suburbs. High-temperature urban areas are surrounded by low-temperature suburbs, like islands in the ocean. This phenomenon is called the urban heat island effect.

Sponge city: an urban construction concept that uses the natural conditions and engineering measures of the city to adjust the storage and release of rainwater to deal with rainwater natural disasters.

The rainwater module is a product produced in order to alleviate the urban heat island effect and cooperate with the construction of a sponge city.

The rainwater collection module is a part of the rainwater collection and utilization system. Several rainwater collection module units are combined to form an underground storage tank. According to the needs of the project, wrap the anti-seepage geotextile or permeable geotextile around the pool to form different types of storage pools, seepage pools and flood control pools. The rainwater collection module is used to assemble the pool, which is easy to install, has a large bearing capacity, and does not breed mosquitoes, flies and algae. After being used in the temporary construction area, it can be dismantled and moved to other areas for continued use. This equipment is suitable for rainwater collection and utilization in large building districts, industrial parks, squares and workshop areas. The rainwater collection module storage tank can effectively store the collected rainwater. These stored rainwater resources can be used for flushing toilets, cleaning roads, watering lawns, water features, and even circulating cooling water and fire water after treatment.

At present, rainwater recycling is mainly used in the following aspects.

1. Rainwater collection, the rainwater resources collected through the modular water storage tank are used for flushing toilets, watering roads, watering lawns, water features, and even circulating cooling water and fire water. It can alleviate the current shortage of urban water resources and is an effective way to increase income and reduce expenditure.
2. Rainwater infiltration, infiltrating rainwater through the reservoir, replenishing groundwater resources, improving the ecological environment, and replenishing freshwater resources.