Accumulated rainwater storage and permeation promotion method for urban green land

Abstract

The invention relates to an accumulated rainwater storage and permeation promotion method for an urban green land. The method includes the following steps of firstly, selecting a place where people can not get close or a hidden place for punching at the position, close to a roadside or the edge of a green land module, at the low position of the green land, wherein holes are distributed in a linear or arc mode, 0.5-1 hole is formed in each square meter, or the distance between the holes is 1-3 m, and the diameter of the drilled holes is 12-15 cm; secondly, filling the holes with composted organic compounds, and mixing the organic compounds with a water-retaining agent, wherein the water-retaining agent accounts for 0.1-0.2% of the organic compounds; thirdly, observing the preservation amount of filler in the holes, and supplementing the water-retaining agent according to the addition amount in the second step if the preservation amount is smaller than 30%. According to the method, by drilling holes in the soil body of the green land and filling the holes with the appropriate quantities of water-retaining agent and organic compounds, the green land can sufficiently absorb rainwater, rainwater is provided for growth of plants, the rainfall runoff is reduced, and the fresh water resource for irrigating the green land is saved.

Description

technical field [0001] The invention relates to a method for absorbing and utilizing rainwater in urban construction, in particular to a method capable of drilling holes in the ground of green space soil and its surrounding compacted layers or impermeable layers, and filling them with water-retaining agents and soil improvement compounds. It is beneficial to the method of collecting, absorbing, infiltrating and utilizing rainwater. Background technique [0002] With the continuous acceleration of the urbanization process, the urban population has increased sharply, and the urban construction area has expanded rapidly, making the underlying surface of the city more and more covered by cement and asphalt, which has led to an increase in the impermeable area of ​​the city, especially the central urban area. In turn, it hinders the infiltration of rainwater, increases the surface runoff coefficient, shortens the peak confluence time, increases the peak flow, and poses a serious ...

AI Technical Summary

Problems solved by technology

[0005] At present, the impermeable pavement in the city has caused a large amount of urban rainwater runoff, and the rainwater cannot be fully absorbed by the underlying surface and the soil of the green space. It is stagnant, infiltrated, purified, and is wasted in vain or discharged into the sewage well. For this reason, it is proposed to build a sponge In cities, rainwater must be "naturally accumulated, naturally infiltrated, and na