A three-stage rainwater collection, purification and utilization system for a mountain sponge city

Abstract

The invention discloses a mountainous region sponge urban three-section rainwater collection, purification and utilization system which comprises a rainwater collection system, a rainwater purification system and a rainwater utilization system. The rainwater collection system comprises a plurality of afforesting grooves formed from the mountaintop to the mountainside in sequence, a plurality of sand settling ponds and a plurality of water collection tanks; the rainwater purification system is formed by arranging a plurality of primary purification grooves and a plurality of secondary purification grooves in a ladder shape along a mountain body downwards, and the primary purification grooves are provided with an anti-scouring layer, a soil layer, a coarse sand layer and a purification layer from top to bottom in sequence; the secondary purification grooves are provided with a soil layer and a filter layer from top to bottom in sequence; the rainwater utilization system comprises an upper landscape pond and a lower water storage tank, and a concrete partition plate is arranged between the landscape pond and the water storage tank. The mountain body environment can be afforested and beautified, the good landscape effect is achieved, pollutants in rainwater can be absorbed so as to purify water, and the system is particularly suitable for building a mountainous region sponge city with water resource shortage.

Description

technical field [0001] The invention belongs to the field of sponge city construction, and in particular relates to a three-stage rainwater collection, purification and utilization system for a mountain sponge city. Background technique [0002] Sponge city means that a city can be like a sponge and has good flexibility in adapting to environmental changes and responding to natural disasters. It absorbs, stores, seeps and purifies water when it rains, and releases and utilizes the stored water when needed. The construction of sponge cities should follow the principles of ecological priority, combine natural ways with artificial measures, and maximize the accumulation, infiltration and purification of rainwater in urban areas on the premise of ensuring the safety of urban drainage and waterlogging prevention, and promote the utilization of rainwater resources. and ecological environment protection. [0003] Although more and more attention has been paid to the efficient use ...

AI Technical Summary

Problems solved by technology

Due to the large natural slope of the mountain city, a large number of mountain slopes are washed by the rainstorm during the summer rainstorm season. Sometimes a large number of rocks are washed down, and the pine trees on the mountain are also washed down to the ground, and some are even uprooted, affecting the residents near the mountain. Therefore, it is necessary to combine the requirements of ecology, economy and landscape to develop a rainwater collection, purification and utilization system with multiple functions suitable for the construction of mountain sponge cities.

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