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

An ecosystem, bermudagrass technology, applied in the fields of botanical equipment and methods, applications, horticulture, etc., can solve the problems of eutrophication of lost water nearshore water, difficulty of new vegetation ecosystems, destruction of old plant ecosystems, etc. , to achieve the effect of improving water quality, beautifying river bank landscape, and good soil and water.

Inactive Publication Date: 2008-07-16
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In the drawdown area of ​​a large reservoir in western my country, the experimental site covers an area of ​​0.4 hectares, close to the Yangtze River, and the land is relatively flat with a slope of 20-25°. The annual average temperature in this area is 17.1-19.5°C, the annual active accumulated temperature is 6500-7000°C, the annual precipitation is 1100mm, and the frost-free period is more than 320 days.

[0028] The Cynodon Dactylon established by cuttings and seed planting in the previous year was used as a backup species bank for the reconstruction of the ecological environment of the water-fluctuation zone of the reservoir. Simultaneously, 20 kilograms of bermudagrass (Cynodon Dactylon) seeds are purchased in the market (Shanghai Tiancheng Grass Industry Company).

[0029] Then choose April to carry out connected concrete slab revetment at the part near the water surface of 1-3 meters, place cultivated plant modules directly in the gap between stones or concrete o...

Embodiment 2

[0032] In the riparian zone of a large river in southern my country, the experimental site covers an area of ​​0.1 hectares. It is close to the Yangtze River. The land is relatively flat with a slope of 20-25°. The annual average temperature in this area is 12.1-17.5°C, the annual active accumulated temperature is 5500-7100°C, the annual precipitation is 1000mm, and the frost-free period is more than 310 days.

[0033] Bermudagrass (Cynodon Dactylon) is used for the reconstruction of the ecological environment of the riparian zone. The method is: use the spare species bank established by cutting and seed planting in the previous year, and buy (Shanghai Tiancheng Grass Industry Company) Bermudagrass (Cynodon Dactylon) at the same time. 20 kg of seeds; from February to March, at 1-3 meters near the water, carry out connected concrete block revetment, place cultivated plant modules directly in the gap between stones or concrete or transplant living bermudagrass plants with soil, o...

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G1/00
Inventor 马利民赵建夫
Owner TONGJI UNIV
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