A compound drainage and salt control system for saline-alkali land

Abstract

The invention discloses a combined draining and saline controlling system for a saline and alkaline land. The combined draining and saline controlling system comprises underground draining subdrains, surface draining open channels, intra-channel controlling gates, water collecting wells, water pumps and reservoirs, wherein the underground draining subdrains are arranged in a farmland in a staggered mode; the surface draining open channels are perpendicular to the underground draining subdrains; the water collecting wells are arranged at joints of the underground draining subdrains; the water pumps are arranged in the water collecting wells; the reservoirs are arranged at tail ends of the surface draining open channels; and the intra-channel controlling gates are arranged between the surface draining open channels and the reservoirs. According to the combined draining and saline controlling system, a horizontal draining system and a vertical draining system are integrated, so that draining and saline reducing effects are achieved, and the common problems that water is drained unsmoothly, the excavation area is large, collapse easily occurs and the like are solved.

Description

technical field [0001] The invention belongs to the technical field of farmland water conservancy engineering, and in particular relates to a compound drainage and salt control system for saline-alkali land. Background technique [0002] Saline-alkali land often has the problems of poor drainage, soil back-salting and secondary salinization. The drainage effect is not good, which is not conducive to the growth of crops. To prevent salinization of the soil, the groundwater table should be kept at a relatively high depth. Field engineering to control the groundwater level has both horizontal and vertical drainage forms. Among them, horizontal drainage can be divided into two types: open ditch and hidden pipe. The use of open ditch drainage in field engineering requires a large amount of excavation, and there are problems such as easy collapse, easy silt, and easy growth of weeds. The use of hidden pipe drainage in field engineering can reduce the occupation of cultivated la...

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Problems solved by technology

However, the underground pipe drainage technology generally uses local material pipes or plastic pipes, and the project cost is relatively high, and the one-time investment is relatively large, so it has not been widely used in my country.

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