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Pollution control method for farmland drainage in plain tidal river network region

A technology for farmland drainage and pollution control, applied in soil drainage, chemical instruments and methods, biological water/sewage treatment, etc., can solve problems in the initial stage and achieve the effect of restoring biodiversity

Inactive Publication Date: 2014-12-24
SHANGHAI ACADEMY OF ENVIRONMENTAL SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Foreign research on ditches is in the development stage, and some research results have been obtained, but domestic research in this area is still in its infancy

Method used

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  • Pollution control method for farmland drainage in plain tidal river network region
  • Pollution control method for farmland drainage in plain tidal river network region
  • Pollution control method for farmland drainage in plain tidal river network region

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as Figure 1 ~ Figure 3 As shown, this embodiment includes the following steps:

[0028] 1) Remove the original concrete slope protection and floor of the farmland drainage ditches;

[0029] 2) Slope the bottom of the ditch according to the slope of 2% along the discharge direction of the flowing water of the farmland, and at the same time carry out slope treatment on the side slope of the drainage ditch according to 65 degrees. The plate is at an angle of 45 degrees to the horizontal line and built into a square according to the burial depth of 15cm Grid structure, reinforced soil slope.

[0030] 3) Set up a 40cm*30cm*40cm (width*depth*depth) sump where the farmland drainage enters the ditch, and set a 40cm*5cm (width*height) outlet weir at the outlet of the sump.

[0031] 4) Ryegrass is planted in the side slope grid of the ditch, and Bermuda, water bamboo and calamus are planted in sequence at the bottom according to the flow direction of the runoff water in t...

Embodiment 2

[0034] Such as Figure 1 ~ Figure 3 As shown, this embodiment includes the following steps:

[0035] 1) Remove the original stone slab slope protection and floor of the farmland drainage ditches;

[0036] 2) Slope the bottom of the ditch according to the slope of 1.5% along the discharge direction of the farmland flow water, and at the same time carry out slope treatment on the side slope of the drainage ditch according to 60 degrees. The plate is formed at an angle of 45 degrees to the horizontal line and built into a square according to the buried depth of 20cm Grid structure, reinforced soil slope.

[0037] 3) Set up a 45cm*35cm*50cm (width*depth*depth) sump where the farmland drainage enters the ditch, and set a 45cm*5cm (width*height) outlet weir at the outlet of the sump.

[0038] 4) Plant clover clover in the side slope grid of the ditch, and plant tall fescue, canna and water onion at the bottom according to the flow direction of the runoff water in the drainage ditc...

Embodiment 3

[0041] Such as Figure 1 ~ Figure 3 As shown, this embodiment includes the following steps:

[0042] 1) Remove the original concrete slope protection and floor of the farmland drainage ditches;

[0043] 2) Slope the bottom of the ditch according to the slope of 2.5% along the discharge direction of the flowing water in the farmland, and at the same time carry out slope treatment on the side slope of the drainage ditch according to 70 degrees. The plate is formed at an angle of 45 degrees to the horizontal line and built into a square according to the buried depth of 15cm Grid structure, reinforced soil slope.

[0044] 3) Set up a 45cm*30cm*45cm (width*depth*depth) sump where the farmland drainage enters the ditch, and set a 45cm*5cm (width*height) outlet weir at the outlet of the sump.

[0045] 4) Vetiver was planted in the side slope grid of the ditch, and clover clover, canna and quince were planted in sequence at the bottom according to the flow direction of the runoff wa...

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Abstract

The invention belongs to the technical field of environmental protection, and discloses a pollution control method for farmland drainage in a plain tidal river network region. The method includes the steps that a drainage ditch is primarily neatened first, then slope settling treatment is conducted on the bottom and the side slope of the ditch in the discharge direction of run-off water in farmland, and an ecological drainage ditch is made; afterwards, reinforcement treatment is carried out on the side slope of the ecological drainage ditch through slabstone or porous water pervious plates; then, turf is planted on the side slope of the ecological drainage ditch, and mixed planting in the sequence of turf planting, shrub planting and hygrophyte planting is performed at the bottom of the ecological drainage ditch in the flow direction of the run-off water in the ecological drainage ditch; at last, a water collecting groove is formed in the connecting position of a farmland drainage ditch and the ecological drainage ditch, an effluent weir is arranged at the water outlet end of the water collecting groove, and the run-off water flows into a river after being purified by the ecological drainage ditch. The pollution control method for farmland drainage in the plain tidal river network region is simple and convenient to use, practical, good in purifying effect and good in landscape effect.

Description

technical field [0001] The invention relates to a method in the technical field of environmental protection, in particular to a pollution control method for farmland drainage in plain tidal river network areas. Background technique [0002] A ditch is a waterway located on both sides of a road or between farmlands for drainage (flood discharge) or irrigation. Its formation process is a water channel dug artificially by human beings to meet the needs of production and life safety. Ditch is one of the common landscape elements in agricultural areas, which has an important impact on agricultural production and ecological environment. It is a semi-natural wetland ecosystem under the influence of human activities. The irrigation and drainage function of ditches is an important guarantee for agricultural ecological security. With the increasingly serious water environment problems, the role of ditches in the prevention and control of water environmental pollution and the protectio...

Claims

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Application Information

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IPC IPC(8): E02B11/00C02F3/32
CPCY02W10/10
Inventor 唐浩黄沈发王敏谭娟吴健吴建强白杨阮俊杰
Owner SHANGHAI ACADEMY OF ENVIRONMENTAL SCIENCES
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