Low elevation greenbelt suitable for mountainous city washing runoff processing

Abstract

The invention discloses a low elevation greenbelt suitable for mountainous city washing runoff processing. The low elevation greenbelt suitable for mountainous city washing runoff processing comprises a low elevation greenbelt body (3) and low elevation greenbelt plants (4), and further comprises a rainwater collecting side ditch (1), a rainwater flow separating device (A) and a water inlet buffering device (2), wherein the rainwater collecting side ditch (1) is arranged at a rainwater confluence section at the periphery of the low elevation greenbelt body (3), the rainwater flow distribution device (A) is located at the tail end of the rainwater collecting side ditch (1), one branch of the rainwater flow separating device (A) is communicated with the water inlet buffering device (2), the other branch of the rainwater flow separating device (A) is a rainwater flood discharge side ditch (13), and the water inlet buffering device (2) is located in the low elevation greenbelt body (3). The low elevation greenbelt suitable for mountainous city washing runoff processing has the advantages of achieving runoff flow separation of initial rainwater and the middle and later period rainwater, and protects the low elevation greenbelt body from being damaged by heavy rainfalls.

Description

technical field [0001] The invention relates to the field of rainfall runoff control in mountainous cities, in particular to a sunken green space suitable for the treatment of scouring runoff in mountainous cities. Background technique [0002] Urban rainfall runoff has become the third largest pollution source of receiving water bodies such as urban rivers and lakes. In recent years, the use of constructed wetland systems, rapid infiltration systems, and soil aquifer treatment systems to reduce surface water pollution and urban rainfall runoff pollution has received widespread attention. The sunken green space is a kind of green space with a special structure. Its elevation is lower than the road surface, and there is a rainwater outlet whose elevation is lower than the road surface but higher than the green space. The sunken green space can collect rainfall runoff from surrounding roads, roofs, etc., and the runoff in the early stage infiltrates into the ground , the late...

AI Technical Summary

Problems solved by technology

As an efficient source non-point source pollution storage and treatment system, the sunken green space has an obvious effect on the non-point source pollution control of the initial rainfall runoff, but the amount of treated water is limited. Compared with the initial rainwater, the mid-late rainwater has a greatly reduced pollutant content , and its water volume is large, which has exceeded the processing capacity of the sunken green space. The continuous strong hydraulic erosion brought by the rainwater runoff will inevitably cause damage to the structure of the sunken green space. Over time, it will eventually lead to the sunken green space Destruction or even complete loss of system function

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