Spiral type low elevation greenbelt capable of efficiently reducing runoff pollutants
A spiral, pollutant technology, applied in the direction of water pollutants, runoff/rainwater treatment, sewage discharge, etc., can solve the problems of imperfect water volume regulation, insufficient pollution filtration and absorption, incomplete absorption of pollution elements, etc., to achieve pollution absorption Various types, prolonging the hydraulic retention time, and improving the effect of cutting rate
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Embodiment 1
[0038] Although there are more and more researches on sunken green spaces, the existing sunken green spaces can meet the treatment of rainfall runoff pollutants to some extent, but there are still obvious defects and deficiencies, (1 ) In the selection of plants in the current concave green space, there is no targeted selection of certain aquatic plants that have a great effect on water purification, which is not conducive to the absorption and utilization of certain polluting elements by vegetation. (2) The hydraulic retention time of the current concave green space is relatively short, which is not conducive to the full absorption and filtration of pollutants by plants and soil fillers; at the same time, the short hydraulic retention time is also not conducive to the storage of rainwater and the Regulation of downstream peak flow.
[0039] The invention provides a spiral sunken green space for efficiently reducing runoff pollutants, which can realize the effects of various t...
Embodiment 2
[0047] Such as Figure 1-4 As shown, a spiral sunken green space for efficiently reducing runoff pollutants includes a spiral sunken green space 1 and a water-retaining filter wall 2, the water-retaining filter wall 2 is rounded, and the spiral sunken green space 1 Including spiral plant belt 3 and bottom plant belt 4. The design elevation of the spiral concave green space 1 is 250mm lower than the surrounding road surface. Aquatic plants are planted on the spiral plant belt 3 and the plant belt 4 at the bottom of the concave green space. The selected aquatic plants have strong nitrogen and phosphorus absorption capacity and water purification. High capacity aquatic canna and iris.
[0048] The vertical slope of every half circle of the spiral plant belt 3 is designed to be 8°~10°. Here, the vertical slope of each half circle of the spiral plant belt 3 is designed to be 8°. Due to the effect of gravity, when the upstream surface runoff and rainwater flow through the spiral s...
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