Method for renovating damaged ecological system of hydro-fluctuation belt of reservoir and bank belt with cynodon dactylon

Abstract

A method for repairing the damaged ecological systems at a hydro-fluctuation zone and a riparian zone of a reservoir with wire grass relates to an engineering technology of ecological repairing at the hydro-fluctuation zone and riparian zone of the reservoir, which firstly filters to acquire the wire grass that can not only grow in drouthy and poor soil, but also can survive by submerging for 1 to 6 months with a submerging depth of 0 to 40 meters, as well as fast resume to grow after the water level falls as a repairing plant, and plants or transplants the plant to a repairing area after adopting asexual propagation or sexual propagation; then maintains the plant so as to ensure the growth in the next year. The invention can rebuild and resume the ecology at the hydro-fluctuation zone and riparian zone, which has the functions of improving the riverside sight, maintaining water and soil, cutting off the surface source contaminations and improving the water body and quality, stabilizing soil, protecting banks, absorbing contaminations in the water in hydroperiod and fast covering the plant on the bank after the water level falls; thereby reaching the effects of resuming and rebuilding the environment at the hydro-fluctuation zone and riparian zone of large-scale reservoirs; the invention has broad application prospect and excellent environment benefit.

Description

technical field [0001] The invention relates to an engineering technique for ecological restoration of a water-fluctuation zone and a riverbank zone of a reservoir. It belongs to the technical field of ecological environment protection and governance. Background technique [0002] After the completion of the reservoir, due to the needs of operation, the water level regulation mode of storing in winter and releasing in summer is often adopted, so that a water level drop of tens of meters and an area of ​​tens or even hundreds of square kilometers will be formed around the reservoir. For example, after the completion of the Three Gorges Reservoir, a vertical distance of 30m and an area of ​​440km will be formed around the reservoir. 2 the sinking zone. The sinking area is a special ecological environment under human disturbance. Compared with the natural riparian zone, the flooding time of some areas can even be as long as 6 months, and the flooding time changes from the sum...

AI Technical Summary

Problems solved by technology

This change will cause devastating damage to the old plant ecosystem in the area, and it is difficult to establish a new vegetation ecosystem in a short period of time.

If it is not handled properly, it will bring a series of ecological and environmental problems, such as soil erosion, geological disasters, non-point source pollution, eutrophication of near-shore water quality, and damage to the natural landscape on both sides of the strait, which will accelerate the deterioration of the ecological environment of the entire reservoir area.