Willow dragon planting system and method for three gorges reservoir area hydro-fluctuation belt

Abstract

The invention belongs to the technical field of hydro-fluctuation belt treatment, and discloses a willow dragon planting system and method for a three gorges reservoir area hydro-fluctuation belt. A willow dragon framework is provided with a wavy flooding-resistant tree planting area, a central axis of the willow dragon framework is overall in a transverse waveform trend, vertical fluctuation amplitude of the central axis is 15-25 m, curve radius is 18-28 m, and average width of the flooding-resistant tree planting area is 8m; the central axis is overall in the transverse waveform trend, the vertical fluctuation amplitude of the axis is 15-25 m, and the curve radius is 18-28 m. According to the willow dragon planting system and method for the three gorges reservoir area hydro-fluctuation belt, a novel willow dragon planting structure suitable for the three gorges reservoir area hydro-fluctuation belt is arranged, water level variation of the three gorges reservoir area hydro-fluctuation belt and top-free submerging during summer flood transit can be adapted, and functions of stable protection of a river bank, conservation of biological diversity and interception of surface runoff are meet; the planting structure has artistic modeling and seasonal phase change at the same time, and the effect of landscaping a hydro-fluctuation belt can be achieved.

Description

technical field [0001] The invention belongs to the technical field of water-fluctuation zone control, and in particular relates to a system and method for planting willow dragons in the water-fluctuation zone of the Three Gorges reservoir area. Background technique [0002] At present: The Three Gorges reservoir area is the key to the great protection of the Yangtze River, and the restoration and management of the water-fluctuation zone is the top priority. Due to the needs of flood control, dredging and shipping, the Three Gorges Project implements the operation mode of "storing clear water and discharging turbidity", that is, low water level operation (145m) in summer and high water level operation (175m) in winter. Therefore, on both banks of the reservoir area at an elevation of 145-175m, a reservoir ebb and flow zone is formed which is opposite to the fluctuation season of the natural river and whose fluctuation range is as high as 30m. At the same time, summer floods...

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Problems solved by technology

At the same time, summer floods pass through the border, and the water level varies every year. Taking 2018 as an example, the water level of the summer flood crossing in the main urban area of ​​Chongqing reached a maximum of 184.3 meters. This is also a major test for the growth of plants in the two river banks. The current plant planting structure is mostly strip-like or sheet-like planting, mainly covered with simple greenery, lacks innovation and aesthetics, and cannot adapt to the water level change and the control function of the hydrofluctuation zone.

[0003] Through the above analysis, the problems and defects of the existing technology are: the existing plant planting structure is mostly planted in strips or sheets, mainly covered with simple green, lacks innovation and aesthetics, and cannot adapt to the water level changes in the ebb and flow zone and water-fluctuation zone management function

[0004] The difficulties in solving the above problems and defects are as follows: the plant planting project in the water-fluctuation zone of the Three Gorges Reservoir area faces the double test of high water level submersion in winter and flood passage in summer. The formation time of the water-fluctuation zone is still short, and the planting technology of the water-fluctuation zone is not yet mature. Based on the current technology, a single tree species is mostly selected for matrix strip or sheet planting to adapt to seasonal inundation, and at the same time, it can have a certain degree of erosion resistance. ability

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