Subsurface flow landscape saline-alkali soil greening system based on river

Abstract

The invention discloses a subsurface flow landscape saline-alkali soil greening system based on a river, and belongs to the technical field of municipal water conservancy. The system comprises a reservoir, a water inlet is arranged on one side of the reservoir, the water inlet communicates with the upstream of an external river channel, a water separation dam is arranged on the other side of the reservoir, a water channel is arranged on the other side of the water separation dam, a water suction pump is arranged in the water channel, a plurality of overflow holes communicate with a water outlet of the water suction pump, the overflow holes communicate with a subsurface flow landscape system, a brine pool is arranged on the other side and provided with a water outlet, and the water outlet communicates with the downstream of the external river channel; and the system comprises a planting soil layer, a first permeable layer is laid at the bottom of the planting soil layer, a first salt discharging pipe is arranged in the first permeable layer, a plurality of open holes are formed in a pipe body of the salt discharging pipe, and a first salt discharging opening is further formed in one end of the first salt discharging pipe and communicates with the brine pool. Depending on greening projects around the river channel, the system can greatly delay the alkali efflorescence time of the planting soil, reduce the frequency of replacing the planting soil, and save social resources.

Description

technical field [0001] The invention relates to the technical field of water conservancy greening, in particular to a river-based underflow landscape saline-alkali land greening system. Background technique [0002] Saline-alkali land refers to land with high saline-alkali value (soil ph value), especially in coastal areas of my country. Due to the influence of geographical environment and climate, the salinity-alkali value of land is generally high, and in greening projects, saline-alkali land cannot be bypassed , For some land with high salinity, commonly used greening plants cannot survive. Therefore, land salinization has brought great difficulties to greening construction. [0003] The general method of the existing technology to solve the problem of the inability to grow green plants in saline-alkali land is to replace the saline-alkali soil with planting soil, and then lay salt drainage pipes and salt drainage wells at the bottom of the planting soil. It will be infil...

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Problems solved by technology

Although the existing technology can reduce the salinity value of the planting soil through the scouring effect of natural precipitation on the planting soil, but because the land salinity will continuously infiltrate the planting soil from all directions, the frequency of natural precipitation is not fixed, and the amount of saline-alkali infiltration is much larger Due to the amount of rainwater erosion, therefore, the planting soil will still be salinized, and the salinization time is short. After the planting soil is salinized, the soil has to be replaced and the greening construction will be carried out again, which brings unnecessary waste of resources.

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