Water-fluctuation zone lowland water and soil conservation rapid water discharge method

Abstract

The invention discloses a water-fluctuation zone lowland water and soil conservation rapid water discharge method, which is characterized by comprising the following steps: microtopographic rehabilitation is carried out on lowland in water-fluctuation zone, which is closely connection with ditch-ridge planting water and soil conservation tillage method suitable for the area; natural feature in the water-fluctuation is connected to form variational microtopographic landscape in the lowland, such as ditches, ridges, fields, pits and the like; drainage channels are excavated along the direction vertical to riverway to form drainage gallery of surface water in lowland; a settling basin is mounted in the drainage channel at certain distance interval to filter and deposit sediment; natural materials, such as blocks, bamboo fence and the like are put in the ridge slope of the drainage channel and ridges to reinforce and prevent runoff and wave from washing and erosion to collapse; By the lights of water potential gradient formed by natural land feature of the water-fluctuation slope, progressive percolation of redundant groundwater from high to low can be realized after a little rehabilitation, thus having the advantages of lower cost, rapid water discharge and treating waterlogging.

Description

technical field [0001] The invention belongs to the field of land utilization in a water-fluctuation zone, and in particular relates to a rapid drainage technology for a seasonal wetland in a water-fluctuation zone. Background technique [0002] The seasonally usable land area in the drawdown zone of the Three Gorges Reservoir is 300 square kilometers, and has high production potential and multiple utilization functions. It is a precious land resource for the Three Gorges Reservoir area where the contradiction between man and land is prominent. However, in the gentle slopes, shallow depressions and coastal plains on both banks, after the water level drops in summer, localized and seasonal wetlands are likely to form. The drainage of these seasonal wetlands is difficult due to the influence of the topography. On the one hand, a small area of ​​stagnant ponds is formed, which affects the land in the water-fluctuation zone to be used as soon as possible during the limited expos...

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Problems solved by technology

Only open ditches are used to control waterlogging, because the increase in the depth of the ditch will inevitably increase the width of the mouth. , because the accumulated water subsides too slowly to meet the management requirements of rapid land utilization in the hydrofluctuation zone; organically combining open ditches and hidden pipes can achieve the goal of both waterlogging and land saving, but the drainage of hidden pipes is due to its production The cost is high, and it has the disadvantages of easy blockage and aging. In addition, it requires large-scale land excavation and backfilling, and the construction cost is high. There is not much application space in the seasonal use of land in the water-fluctuating zone.

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