Vent-hole-containing undrained saline-alkali region water resource collecting and utilizing system

Abstract

The invention discloses a vent-hole-containing undrained saline-alkali region water resource collecting and utilizing system, which comprises a soil body, vent holes and water storage wells. The soilbody 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; the vent holes extend downwards to the permeable membrane layer from the planting soil layer; a trench protruding into the saline-alkali soil layer is formed in the lower surface of the water storage layer andinternally provided with a concealed conduit; the concealed conduit is connected and communicates with the water storage wells in the slope direction; the water storage wells are formed in the soil body at intervals, the depths of the water storage wells extend to the lower part of the trench from top to bottom, and walls of the water storage wells are each of an impermeable structure; and junctions of the system and surrounding buildings or structures are inversely packed through the lateral waterproof layers. Rainwater permeating into the planting soil layer after precipitation can be effectively collected, and salt return of the saline-alkali soil layer to the planting soil layer is avoided.

Description

technical field [0001] The invention belongs to the field of water resource treatment in saline-alkali land, and in particular relates to a non-drained saline-alkali water resource collection and utilization system with ventilation holes. Background technique [0002] my country's per capita water resource consumption is only 30% of the world level, and most areas are short of water or severely short of water. In recent years, with the further deepening of urbanization, the demand for water resources is increasing. How to develop efficiently Utilization of water resources has become a challenge that the whole society needs to face together. [0003] In order to explore the path of sponge city construction under different natural environments and urban forms, the country has carried out two batches of 30 sponge city pilot projects. At present, the construction of sponge cities has been carried out in full swing across the country, and different rainwater is used for different ...

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