Rainwater grates capable of separating initial rainwater runoffs

Abstract

The invention relates to rainwater grates capable of separating initial rainwater runoffs. The rainwater grates capable of separating initial rainwater runoffs comprises a concrete base plate (7) and water-permeable ports (6) formed in the concrete base plate, wherein water passing galleries (5) are formed at the two sides of each water-permeable port (6), the scale height of each water-permeable port (6) is larger than that of each water passing gallery (5), and arc water catchment ports (4) are formed in the two ends of each water passing gallery (5). The rainwater grates capable of separating initial rainwater runoffs has the advantages of being capable of separating the initial rainwater runoffs from the runoffs in the middle and later periods, reducing the water amount entering the city rainwater pipe network and lightening the water processing load of sewage plants on one hand, making full use of the potency that roadside green detain and absorb the initial rainwater runoffs so that road surface source pollutants can be reduced on the other hand, and being capable of effectively relieving even solving the problem of city surface source pollution due to the fact that rainwater runoffs scour roads in the rainfall process.

Description

technical field [0001] The invention belongs to the technical field of urban non-point source pollution control, and in particular relates to a rainwater grate capable of separating initial rainwater runoff. Background technique [0002] At present, with the continuous expansion of the scale of cities in our country, the type of land use has undergone tremendous changes, a large number of impermeable surfaces have appeared, the surface runoff coefficient has increased significantly, and the runoff formed by urban rainfall is much larger than in the past. Urban non-point source pollution caused by rainwater runoff scouring roads during rainfall has become one of the main reasons for the deterioration of urban water quality. Urban roads have a large traffic load and occupy a large area, and the generation intensity of their non-point source pollution load is greater than that of roofs, squares and other impermeable underlying surfaces, so they should be the key objects of urba...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a rainwater grate that can separate the initial rainwater runoff, which replaces the existing roadside rainwater grate, and can lead the initial runoff containing a large amount of road surface source pollutants to the roadside greening On the one hand, it realizes the separation of the initial road runoff from the middle and late runoff, and on the other hand, it fully utilizes the sewage purification potential of the roadside green belt to absorb and degrade the pollutants in the initial runoff, effectively reducing the surface runoff coefficient and being able to treat part of the runoff pollutants , effectively alleviate or even solve the problem of urban non-point source pollution caused by rainwater runoff scouring roads during rainfall

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