Integrated system of decentralized rainwater runoff net storage and drainage in built-up area and its application method

Abstract

The invention provides a purification-storage-drainage integrated system for dispersed rainfall runoffs of a built-up area and an application method of the purification-storage-drainage integrated system. The purification-storage-drainage integrated system comprises a primary rain pre-purification pond and a moderate rain storage pond, wherein a residue blocking region, a solid separating region, an oil floating region, a particle filtering region, an aerobic mixing region, a secondary filtering region and a water collecting region are sequentially arranged in the primary rain pre-purification pond; and a sewage blocking region, a storage pond and a draining region are sequentially arranged in the moderate rain storage pond. According to the purification-storage-drainage integrated system, rainwater dispersively discharged in neighbors of the built-up area is conveyed into the primary rain pre-purification pond and the moderate rain storage pond through a riverside confluence main pipe, respectively, so that the total runoff of the river is reduced, the occurring time of a runoff peak value is delayed, and the water logging control pressure of the region is relieved; polluted rainwater is primarily purified in the primary rain pre-purification pond, so that runoff pollutants entering the river are effectively reduced, and the water quality of the river is improved; and clean rainwater in the moderate rain storage pond can be directly recycled, so that the clean rainwater resource is effectively utilized.

Description

technical field [0001] The invention relates to the fields of hydraulic engineering and environmental engineering; [0002] In particular, it relates to an integrated system for dispersing rainwater runoff, net storage and drainage in built-up areas; [0003] The present invention also relates to an application method of the integrated system for dispersing rainwater runoff, net storage and drainage in the built-up area. Background technique [0004] Building a "sponge city" with natural accumulation, natural infiltration and natural purification is the latest urban construction concept in my country and an important part of ecological civilization construction. The slow-release effect adopts various technical measures such as "seepage, stagnation, storage, purification, use, and drainage" to realize the control of the total amount of runoff, the time of peak runoff, runoff pollution, and the improvement of rainwater resource utilization, reflecting urbanization and urbaniza...

AI Technical Summary

Problems solved by technology

[0006] The built area is basically developed in a piece. When the rainwater discharge is not restricted by the terrain, the principle of nearby discharge is mostly adopted. The rainwater pipes in the neighborhood are scattered and discharged into the river nearby. It is unrealistic to take measures at the end of each rainwater pipe. Rainwater mains, because there is no site or road along the river to arrange rainwater mains, especially some buildings in the old city are directly built on the revetment of the river, and it is very difficult to implement

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