Ecological permeability reducing method and ecological permeability reducing soil for river

Abstract

The invention relates to an ecological permeability reducing method and a new ecological permeability reducing material for a river. The international patent classification (IPC) number of the invention is E02B3 / 00. The ecological permeability reducing method for the river comprises the main steps of: preparing ecological permeability reducing soil, clearing the river, compacting a foundation, spreading a permeability reducing layer, and backfilling a protective layer. The ecological permeability reducing soil is prepared by mixing local soil and bentonite, wherein the dry weight content of the local soil is 80 to 90 percent, and the dry weight content of the bentonite is 20 to 10 percent. Two natural materials are adopted in the method, and the soil serving as a main component can be taken locally, so the manufacturing cost is low; the soil is integrated with the natural river, so the ecological repair, permeability reducing and water holding requirements of the river can be met, andhealthy development of the ecological system of the river can be kept; and the method has certain water purification effect on the permeated water of the river using regenerated water as source water. The method can be applied to the permeability reducing engineering of rivers, lakes and wetlands, and has remarkable economic, social and ecological benefits.

Description

1. Technical field [0001] The invention relates to a new material for river channel seepage reduction, which is especially suitable for ecological seepage reduction projects of sand and gravel river channels in the northern arid region. Its IPC international patent classification number is E02B 3 / 00. 2. Background technology [0002] The sand and gravel rivers and lakes involved in the arid areas are generally located in the middle and upper reaches of the river basin, and the riverbed is mainly composed of sand, gravel or pebbles, with high water permeability. However, in arid areas, water resources are often scarce, and a small amount of river water is mostly due to the high water permeability of the riverbed. It is in a state of subsurface flow. Affected by global climate change and social and economic development, the shortage of water resources has become more serious. The time and space ranges affected by drought have been significantly expanded, and many rivers are of...

AI Technical Summary

Problems solved by technology

Although the former two can play a good anti-seepage effect, they have adverse effects on the natural ecosystem of the river course, damage the interconnection of water phase, soil phase, gas phase and biological phase, destroy the natural ecosystem of the river, and the river water loses its self-purification. capacity, water quality deterioration is accelerating; the third material has slightly less impact on the natural ecosystem than the first two, but it adds a layer of refractory foreign matter in the river, which is not in harmony with the natural river. At the same time, once it is washed by floods, it may be destroyed. The fourth material, clay layer, has a good ecological effect for anti-seepage, but it has the disadvantage of weak erosion resistance in sand and gravel river courses in mountainous areas, and there is also a shortage of clay resources in some areas.

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