Vegetation Restoration Method in Reservoir Fluctuation Zone

Abstract

The invention discloses a method for restoring vegetations in a water-level-fluctuating zone. The method is capable of effectively preventing and controlling water and soil loss, intercepting and absorbing harmful chemical substances in a water body, reducing eutrophication of the water body and rapidly afforesting the water-level-fluctuating zone, and has the functions of fixing soil and retaining banks. The method comprises the following steps: 1) preparing soil of a riverside slope surface in a fluctuating zone, finishing the fluctuating zone along the contour line to form a step structure, and respectively digging a cuttage ditch on various steps of the step structure; 2) using nutrient soil to cover various cuttage ditches, inserting a plurality of living branch wooden piles, and connecting the adjacent living branch wooden piles on the same step by using a rope to form a whole, wherein planting grooves are formed between two rows of living branch wooden piles on the adjacent steps; 3) sequentially filling a lower mucky soil layer, a water supply layer, an upper mucky soil layer and a nutrient soil layer into the planting grooves from bottom to top so as to form a planting layer; and 4) respectively planting submerged plants, emergent aquatic plants and water-resistant tree shrubs in various planting grooves along the step structure from bottom to top, so that a three-dimensional vegetation restoring space is formed.

Description

Technical field [0001] The invention belongs to the field of environmental geotechnical engineering, and in particular relates to a method for restoring vegetation in the hydro-fluid zone of a reservoir. Background technique [0002] The fluctuation zone of the reservoir is also called the fluctuation zone or fluctuation zone, which refers to a special area where the surrounding submerged land is periodically exposed on the water surface due to seasonal fluctuations of water level. The water level of the reservoir forms a huge ecological isolation zone around the reservoir between the water body and the land bank, which is a special wetland ecosystem of land and water. The periodic fluctuation of its water level will cause soil erosion, vegetation destruction, geological disasters and other hazards, threatening the normal function of water conservancy and hydropower projects, the lives and properties of the people in the reservoir area, and the sustainable development of the rese...

AI Technical Summary

Problems solved by technology

After the formation of the Three Gorges Project's comprehensive impoundment and water-fluctuation zone, the water-fluctuation zone will be eroded by the impact and erosion of reservoir bank runoff and reservoir water waves, causing soil erosion and bank collapse, which will not only fail to protect the water body, but will carry more Pollutants and sediments threaten reservoir water quality and dam safety

These measures cannot effectively control water and soil loss in the water-fluctuation zone; the effect of intercepting and filtering nutrients such as nitrogen and phosphorus in the water body is limited, resulting in increasingly serious water eutrophication in the reservoir area; The ecological relationship between aquatic zones is not considered as a whole ecosystem; the selection and configuration of plants uses a single water-tolerant herb without considering the diversity of plant growth in the water-fluctuating zone. Changes in the amphibious growth environment

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