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Terrace bank construction method for changing slope farmland into level terrace in reservoir area of Three Gorges

A technology of the Three Gorges reservoir area and construction methods, which is applied in the direction of site preparation, excavation, construction, etc., can solve the problems of large amount of construction of horizontal terraces, a large amount of manpower and material resources, and difficulty in realizing it, so as to achieve enhanced farming efficiency and water and fertilizer utilization. Effects of improving and reducing renovation costs

Inactive Publication Date: 2012-03-28
CHONGQING NORMAL UNIVERSITY
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Problems solved by technology

According to the survey, the construction of horizontal terraces has a large amount of engineering (earthwork volume 3000-6000 m 3 / hm 2 ), high cost (30,000-100,000 yuan / hm 2 , excluding supporting investment in slope water systems), and requires a large amount of manpower and material resources, which is difficult to achieve under the background of a large number of rural labor transfers in the Three Gorges Reservoir area

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  • Terrace bank construction method for changing slope farmland into level terrace in reservoir area of Three Gorges
  • Terrace bank construction method for changing slope farmland into level terrace in reservoir area of Three Gorges
  • Terrace bank construction method for changing slope farmland into level terrace in reservoir area of Three Gorges

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with accompanying drawing.

[0024] The method for constructing ridges from slopes to terraces in the Three Gorges reservoir area of ​​the present invention, the sloping cultivated land is composed of a plurality of horizontally divided farming units, and a ridge for solid soil walking is built on the outside of each farming unit. In this method, there are both stone ridges and earth ridges in the ridge, and there is always an earth ridge between the two stone ridges, forming a mixed mode of "rock ridge + earth ridge" interval, and based on the stability requirements of the ridge, (the bottom of the slope) The ridges outside the next level of farming units are always constructed as stone ridges. Ridges are configured according to slope and slope length and thresholds for rill erosion to occur. The construction materials of the stone sill can be block stone, gravel, (hollow) bricks, etc. During the con...

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Abstract

The invention discloses a terrace bank construction method for changing slope farmland into level terraces in the reservoir area of the Three Gorges. The slope farmland consists of a plurality of transversely-partitioned cultivation units; a terrace bank for soil reinforcement walking is built on the outer side of every cultivation unit; all terrace banks include stone banks and soil banks; the soil banks are always arranged between every two stone banks; the terrace bank on the outer side of the cultivation unit on the bottommost layer of a slope surface is a stone bank; every cultivation unit is cultivated by keeping the original slope farmland micro-topographic feature; and the soil banks are positioned on the outer edges of the original cultivation units. The method has the advantages of reduction in the cost investment, convenience for agricultural cultivation, good water and soil conservation effect and easy acceptance by farmers.

Description

technical field [0001] The invention relates to water and soil conservation technology, and specifically refers to a ridge construction method for converting slopes into terraces on sloping farmland in the Three Gorges Reservoir area. This method can reduce construction costs compared with horizontal terraced land with stone ridges, and has better water and soil conservation effects than building all stone ridges. It is more ecological and belongs to the technical field of water and soil conservation. [0002] Background technique [0003] my country's natural conditions are complex, with large areas of mountains and hills, and the per capita arable land area is only 1.38 mu, which is less than 40% of the world average. Especially in the Three Gorges Reservoir area, the per capita arable land area is only 0.81 mu. The existing arable land resources are mainly sloping farmland, and the area of ​​sloping arable land above 15° accounts for 47.6% of the total arable land area. ...

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Application Information

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IPC IPC(8): E02D17/20A01B79/02
Inventor 韦杰金慧芳郑红丽
Owner CHONGQING NORMAL UNIVERSITY
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