Novel rainwater garden

Abstract

The invention discloses a novel rainwater garden. The rainwater garden comprises a covering layer and a gravel layer from top to bottom; the novel rainwater garden further comprises a mixing layer which is located between the covering layer and the gravel layer, the mixing layer comprises a biochar material and soil, and the biochar material comprises 55%-65% of carbon, 35%-40% of organic matter and 5%-10% of nutrient elements. The novel rainwater garden has the advantages of being good in purification effect, capable of turning waste to wealth and the like.

Description

Technical field [0001] The present invention relates to the preparation of charcoal materials, in particular to rain gardens using novel biochar materials. Background technique [0002] The rain garden is a shallow recessed green space formed naturally or manually. It is used to gather and absorb rainwater from the roof or the ground. The rainwater is purified through the comprehensive action of plants and sand, and it gradually penetrates into the soil to conserve groundwater, or Make it replenish urban water such as landscape water and toilet water. It is an ecologically sustainable rainwater control and rainwater utilization facility. In actual structures, rain gardens often include gravel layers, sand layers, planting soil layers, overburden layers and aquifers. The role roughly covers the control of water volume and water quality: the upper part of the water volume is retention, that is, to ensure a certain hydraulic retention time and reduce the pressure of urban drainage...

AI Technical Summary

Problems solved by technology

The control of water quality is the most difficult to achieve. Due to the large number of rainwater pollutants and complex components, the mechanism of traditional removal methods is equivalent to the mechanism of soil removal of pollutants, but the ability of soil to remove pollutants is limited, especially for some heavy metals or organic pollution. The adsorption capacity of pollutants is low, which will cause the water body containing pollutants to enter the groundwater through the soil filter layer and sand layer, causing groundwater pollution

In addition, because landscape plants need to be planted on the rain garden, the role of plants can absorb pollutants in the water body on the one hand, and can also play a role in landscaping on the other hand. However, in terms of plant maintenance, pesticides and chemical fertilizers need to be sprayed. The runoff will enter the groundwater, which will aggravate the pollution of groundwater

[0003] Therefore, the current traditional rain garden has the following deficiencies: the ability to remove heavy metals and organic pollutants contained in rainwater is limited; the plants in the rain garden can effectively absorb pollutants; in addition, the application of pesticides and fertilizers will bring In addition, rain gardens need to be poured from time to time due to the poor water retention capacity of the soil in sunny days, resulting in waste of water resources

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