Farmland underground water drainage design method

Abstract

The invention relates to a farmland underground water drainage design method. Underground water drainage ditches are vertically distributed in a check field along the water irrigation direction, and the tail ends of the underground water drainage ditches which are vertically distributed are communicated with underground water drainage ditches which are transversely arranged, wherein the depth of each underground water drainage ditch is 0.8-1.2m; each underground water drainage ditch is internally and fully paved by straws or wheat straw fillers to be rolled for 3-5 times back and forth along the ditch by using a stone roller, and soil is gradually filled to be compacted layer by layer after the rolling; a general water drainage pipe is arranged at the middle positions of the underground water drainage ditches which are transversely arranged and an outlet is placed into a farming ditch; and surplus farmland underground water is discharged out. The farmland underground water drainage design method can effectively solve the problem of reducing immersion of a southern region farmland, improves a farmland soil-steam ratio, and increases the ground temperature; and meanwhile, a simple and feasible operation method is provided for comprehensive utilization of the straws. Compared with the prior art, the farmland underground water drainage design method utilizes the pure natural straws or wheat straws, uses local materials, is simple to construct and has a low construction cost, so that materials and used lands are saved; the water drainage effect is obvious; and the farmland underground water drainage design method is good for increasing the production of grains and can be popularized and applied in a large area.

Description

technical field [0001] The invention relates to an underground drainage method for farmland. The compact rice straw or wheat straw is used to bury it in the underground drainage ditch with a rectangular section, and a connected and stable underground drainage channel is formed with a grid field as a unit, and a drainage outlet is arranged in each grid field. , to discharge the farmland groundwater to achieve the purpose of farmland waterlogging. The inventive method is particularly suitable for the treatment of waterlogged fields in southern my country, and belongs to the field of agricultural engineering. Background technique [0002] Farmland underground drainage refers to the artificial measures to remove excess soil water and groundwater in the farmland, improve the relationship between water, fertilizer, air and heat in the soil, and facilitate the growth of crops. Both paddy fields and dry land have underground drainage problems. Especially in southern China, rainfall...

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Problems solved by technology

The use of underground pipe drainage measures has the advantages of not occupying land, being convenient for farming, ensuring the depth of drainage, and facilitating management and maintenance. The disadvantage is that the one-time investment in engineering construction is large, and many building materials are used, which is easy to be blocked and aging; the rat track is based on tractors. The power traction rat plow squeezes the soil to form an unprotected tunnel drainage, which has the advantages of small investment and convenient construction, but the disadvantage is that the service life is short; the vertical well drainage means that the well group is arranged to pump groundwater, which is suitable for the soil layer with good water permeability , can control the groundwater level to a large extent, but the disadvantage is that it consumes energy and is not suitable for underground drainage of farmland in the south

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