System and method integrating road surface runoff collection, purification, storage and utilization for plants

Abstract

The invention relates to a system and a method integrating road surface runoff collection, purification, storage and utilization for plants. A biological planting groove lower than a road surface is used for collecting and processing road surface runoff at an initial stage and formed by stacking a planting soil layer, an infiltration filtering layer, a supporting layer, a water storage layer, an impervious layer and the like from the top to the bottom. The road surface runoff at a later stage is collected in a level observing well separated in the groove through an overflowing groove on the side of the biological planting groove and can be discharged directly through a lateral wall water discharging pipe. The collected road surface runoff at the initial stage is calculated according to an area rainstorm intensity formula and collecting time, and on the basis of the calculated road surface runoff at the initial stage, filling material texture and thickness, soil infiltration capacity, a soil surface distance and an overflow distance are combined to distribute filling materials of the planting soil layer and the water storage layer. Storage water is extracted by an extraction device and utilized for road surface plants. The system and the method are applicable to collection, processing and comprehensive utilization of the road surface runoff which is at the initial stage and has a pollution effect and emergency management of a road environment under the condition of leakage of dangerous goods during transportation.

Description

technical field

[0001] The invention belongs to the road surface runoff treatment system and method in the technical field of road environmental protection, and particularly relates to a system and method for collecting road surface runoff, purifying, storing water and utilizing it for plants. Background technique

[0002] Relevant studies at home and abroad have shown that pavement runoff contains a large number of complex pollution components. Generally speaking, road surface runoff pollution components include heavy metals, mineral oils, chlorides, chemical oxygen demand (COD), suspended solids (SS), BOD, polycyclic aromatic hydrocarbons (PAHs), etc., the content of SS is high, while the content of COD is relatively low, and the content of petroleum and heavy metals is high.

[0003] Relevant research results show that during the rainfall process, the content of heavy metals and suspended solids in the pavement runoff gradually decreases with the continuation of the rainf...

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