Big cross slope and small downward slope type slope terraced field structure and construction method thereof

Abstract

The invention discloses a big cross slope and small downward slope type slope terraced field structure and a construction method thereof. The structure is as follows: the upper border and the lower border of a sloping surface plot are provided with plant protective ridge terraces, the upper side and the lower side of each terrace are respectively provided with a side ditch and a back ditch, and other periphery of the sloping surface plot is provided with drainage ditches connecting with the upper border terrace back ditches and the lower border terrace side ditches along the slope surface to form a drainage network drain; the sloping surface plot in the drainage network drain is divided into multiple downward slope ridging zones by cross slop damming ditches; a plurality of small ridging downward slopes are evenly distributed in the downward slope ridging zones; a ditch is arranged between adjacent small downward slopes; and all the ditches in the downward slope ridging zones are communicated with the damming ditches and side ditches of the cross slope. The invention has the characteristics of retaining water, reducing erosion, saving labor force and being convenient for operation.

Description

Technical field [0001] The invention relates to a middle-slope terrace structure technology in the field of agricultural technology, in particular to a "large horizontal slope + small downhill" slope terrace structure and a construction method suitable for purple steep slope farmland in the Three Gorges reservoir area. Background technique [0002] The Three Gorges reservoir area has an important strategic position in my country, especially in the social economy, water resources security and ecological barriers of the Yangtze River Basin. The construction and operation of the Three Gorges Project and the resettlement of immigrants in the reservoir area are and will have a significant impact on the ecosystem, surface processes, and social economy of the reservoir area and watershed. After the impoundment of the Three Gorges Reservoir, 389,500 acres of arable land was submerged in the reservoir area, making the conflict between regional development and resources and environmental c...

AI Technical Summary

Problems solved by technology

After the Three Gorges Reservoir was impounded, 389,500 mu of cultivated land was submerged in the reservoir area, making the contradiction between regional development and resources and environmental carrying capacity more acute; The increase in the range not only increases the difficulty of soil and water conservation such as returning farmland to forests (grasslands) and ecological restoration, but also increases the utilization rate and reclamation rate of limited land resources in order to develop the rural economy and increase food production, aggravating soil erosion.

[0005] "Slope to terrace" has always been the focus of projects such as "Changzhi" and "Reconstruction of low- and medium-yielding fields". The ridges of terraced fields occupy a lot of land and require high-intensity manpower and material resources. In the case of a large number of rural laborers going out to work and the cancellation of "two industries", it is a severe challenge to transform most of the sloping farmland into horizontal terraced fields.

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