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Method of artificial construction of root holes in wetland

A wetland and artificial technology, applied in chemical instruments and methods, aerobic and anaerobic process treatment, water/sludge/sewage treatment, etc., can solve the problems of difficult renewal, high soil viscosity, low hydraulic conductivity, etc. Improved hydraulic conductivity, high retention efficiency, and reduced soil bulk density

Active Publication Date: 2011-07-06
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of high soil viscosity and low hydraulic conductivity in general wetlands, and to overcome the shortcomings of traditional artificial wetland matrix filler media such as difficult renewal and easy blockage, the present invention provides a method for artificially constructing wetland root holes, namely Artificial root pores are formed at the initial stage of wetland construction. Through the transition between artificial root pores and natural root pores and the continuous renewal of wetland root pores, the self-renewal of the wetland matrix filler medium is realized, so that no blockage occurs

Method used

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  • Method of artificial construction of root holes in wetland

Examples

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Effect test

Embodiment 1

[0037] figure 2 Example 1 of the present invention is shown, wherein the total thickness of the constructed wetland soil layer is about 60 cm. Among them, two layers of dry straw are pre-embedded at the bottom of the wetland. The selected plant straw is composed of corn straw and rape straw, and its water content must be lower than 20%. The volume ratio of the two is 75%:25%. After calculation, the amount of straw per unit area of ​​wetland is: 18 tons / ha of corn straw; 12 tons / ha of rapeseed straw. The corn stalks used are 1.6-2m in length and 2-3cm in diameter, and the leaves are removed. Rapeseed straw has a length of 0.6-1m and a diameter of 2-5mm. The plant straw layer 4 in the wet area is constructed in a thick-thin + thin-thick laying pattern. The specific method is: after the bottom elevation of the wetland plant bed reaches the theoretical digging depth and is leveled, lay the first layer of straw (9 tons / ha of corn straw, covered with 6 tons / ha of rape straw); 1...

Embodiment 2

[0040] Figure 3 to Figure 6 Example 2 of the present invention is shown, wherein the slope ratio of the wetland plant bed slope is 1:6, the slope ratio of the wetland ditch slope is 1:3, and the depth of the wetland plant bed construction soil layer is 55cm. The range of plant straw laying is inside the wetland plant bed, and the outer distance of the edge laying is 0.5m inward from the edge of the plant bed slope. The width of the wetland plant bed is 21.7m, and the length varies in different areas of the wetland, ranging from 22m to 220m. When constructing large-scale artificially constructed root hole wetlands, there is a 40cm difference in elevation between the wetland plant bed surface 6 and the ditch bottom 8 in different areas of the wetland. The higher side flows to the lower side of the wetland, and the total slope ratio of the whole wetland is about 1:1750. In this embodiment, 4 layers of plant stalks are laid in the soil layer of the wetland plant bed. Figure 6...

Embodiment 3

[0042] Figure 7Embodiment 3 of the present invention is shown, in which the laying manner of plant straws in the wetland plant bed is coarse-fine-fine-coarse. This embodiment differs from Embodiments 1 and 2 in that each individual straw layer is laid in a coarse-fine-fine-coarse (4 sub-layer) mode, and the plant straw is in the corresponding layer Evenly distributed in the soil; the coarse-fine and fine-coarse arrangement of the plant stalks in Example 1 is symmetrically distributed, but there is a layer of 10cm natural soil layer in the middle; the plant stalks are alternately fine-coarse in Example 2 Arranged in a pattern, there is also a natural soil layer about 10cm thick in the middle. The laying mode of Embodiment 3 will be described in detail below. The total depth of the wetland plant bed construction soil layer is about 65cm, in which two layers of plant straw are laid, and the thickness of each layer is 15cm. These two straw layers are respectively laid in the s...

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Abstract

The invention discloses a method of artificial construction of root holes in wetland, and the method comprises: in the primary stage of wetland construction, plant straws are imbedded in the sublayer of wetland soil; aquatic plants or wetland plants which can form natural root holes are planted in the wetland bed imbedded with plant straw; in the wetland, artificial root holes form after the plant straw decays; and water flow is filtered from the root hole system in the wetland bed due to the presence of a hydraulic head difference between the two sides of the wetland bed. In the primary stage of artificial wetland construction, the method can accelerate the development of biological macro-pores in soil; strong transverse / lateral filter network is formed and promoted by artificial work, and moisture is rapidly conducted to internal part of the wetland soil, thus the processing efficiency of wetland is greatly raised; the self-renewal of the substrate packing media of the wetland is achieved by continuously updating the wetland root holes and the transition between artificial root holes and natural root holes; and the disadvantage that obstruction is easy to happen in packing media for common artificial wetland is overcome, and the method provides a good foundation for the healthy substitution of wetland.

Description

technical field [0001] The invention relates to a method for constructing wetlands, in particular to a method for artificially constructing root holes in wetlands. Background technique [0002] Constructed wetland technology has been widely used at home and abroad because of its various forms, high treatment rate, and strong adaptability. It has become an effective way for developed countries and regions to explore and solve the problems of water pollution and water resources shortage. Traditional constructed wetlands are mainly composed of soil, matrix fillers (such as gravel, etc.) and aquatic plants planted above the wetland bed, forming a unique ecosystem with water treatment functions and performing corresponding functions. Constructed wetlands overcome the disadvantages of general wetlands that the soil is formed by sedimentation, high viscosity, and low hydraulic conductivity. However, the matrix filler of traditional constructed wetland technology is mainly composed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32C02F3/34C02F3/30
CPCY02W10/10
Inventor 王为东尹澄清赵洪涛李静
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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