Bioretention-pond-containing saline-alkali region water resource regulation and storage utilizing system

Abstract

The invention provides a bioretention-pond-containing saline-alkali region water resource regulation and storage utilizing system, which comprises a soil body and water storage wells. The soil body comprises a planting soil layer, a permeable membrane layer, a water storage layer, waterproof layers and a saline-alkali soil layer which are sequentially arranged from top to bottom; a bioretention pond is formed in the planting soil layer, a pit is formed in the lowest position of the bioretention pond, the depth of the pit extends to the permeable membrane layer, and the pit is filled with a mixture of planting soil and mountain sand; a trench protruding into the saline-alkali soil layer is formed in the lower surface of the water storage layer and internally provided with a concealed conduit; the water storage wells are formed in the soil body at intervals; the planting soil layer is connected with surrounding structures in the slope direction from low to high; and pebble ditches are formed in the upper surfaces of the junctions of the edge of the planting soil layer and surrounding buildings. According to the bioretention-pond-containing saline-alkali region water resource regulation and storage utilizing system, rainwater converged into the bioretention pond after precipitation can be collected very effectively, and salt return of the saline-alkali soil layer to the planting soil layer is avoided; and the greening elevation of saline-alkali land can further be lowered, and meanwhile runoff pollution to surrounding facilities such as roads is reduced.

Description

technical field [0001] The invention belongs to the field of water resources treatment in saline-alkali areas, and in particular relates to a system for regulation, storage and utilization of water resources in saline-alkali areas containing biological retention ponds. Background technique [0002] Rainwater is a very precious freshwater resource, especially for the coastal saline-alkali land, which is a serious water shortage area, and it is even more valuable to collect and utilize rainwater. Due to the lack of water in saline-alkali land, the salt concentration in the soil exceeds the tolerance of plants, forming salt damage. Salt comes with water, and salt goes with water, so sufficient fresh water supply must be ensured, so that saline-alkali land resources can be used sustainably. [0003] The total area of ​​coastal saline-alkali soil in my country is 500×10 4 hm 2 ,. With the development of economy and industry in recent years, saline-alkali areas have become a n...

AI Technical Summary

Problems solved by technology

However, the disadvantage of the existing method of "flooding with stone chips" and "salt drainage through hidden pipes" to control saline-alkali land is that after the rainwater infiltrates into the soil, it enters the saline-alkali layer through the stone chip layer, or is directly discharged into the municipal water. Drainage pipe network, rainwater cannot be effectively used, and at the same time, a large amount of nutrients such as nitrogen, phosphorus, and potassium are also discharged into the municipal rainwater system during the fertilization process, which also causes eutrophication of downstream water bodies; surface runoff that does not have time to infiltrate during rainfall Rainwater flows into low-potential areas such as surrounding roads, which increases road drainage pressure and waterlogging risk. At the same time, the green land soil washes the road surface with the runoff, causing runoff pollution such as mud left on the road after rain; the amount of land for greening is large and uneconomical

Images