Pollution control method of farmland drainage in plain tidal river network area

A technology for farmland drainage and pollution control, applied in soil drainage, chemical instruments and methods, botanical equipment and methods, etc., can solve problems such as lack of technical support for ecological ditches, and achieve the effect of restoring biodiversity and reducing effective interception

Inactive Publication Date: 2011-04-13
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are few reports on the ecologicalization of ditches in plain tidal river network areas, a

Method used

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  • Pollution control method of farmland drainage in plain tidal river network area
  • Pollution control method of farmland drainage in plain tidal river network area
  • Pollution control method of farmland drainage in plain tidal river network area

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] First, remove the original concrete slope protection and floor of the farmland drainage ditches;

[0027] Such as figure 1 As shown, the bottom of the ditch is sloped according to the slope of 2% along the discharge direction of the farmland, and the side slope of the drainage ditch is sloped according to 65 degrees. Build a square grid structure and reinforce the soil slope 1.

[0028] Simultaneously, 40 centimeters * 30 centimeters * 40 centimeters (width * depth * depth) sump 2 is set at the place where the farmland drainage enters the ditch, and the outlet weir of 40 centimeters * 5 centimeters (width * height) is established at the sump 2 water outlets.

[0029] Such as figure 2 and image 3 As shown, ryegrass 3 is planted in the ditch slope grid, and Bermuda 4, water bamboo 5 and calamus 6 are planted sequentially at the bottom according to the flow direction of runoff water in the drainage ditch.

[0030] The monitoring results of Example 1 show that the buf...

Embodiment 2

[0032] First remove the original stone slab slope protection and floor of the farmland drainage ditches;

[0033] Then slope the bottom of the ditch according to the slope of 1.5% along the discharge direction of the flowing water in the farmland, and at the same time slope 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 burial depth of 20 cm. Grid structure, reinforced soil slope 1.

[0034] Simultaneously, 45 centimeters * 35 centimeters * 50 centimeters (width * depth * depth) sump 2 is set at the place where the farmland drainage enters the ditch, and the water outlet weir of 45 centimeters * 5 centimeters (width * height) is established at the sump outlet.

[0035] Flower clover is planted in the side slope grid of the ditch, and tall fescue, canna and water onion are planted in sequence at the bottom according to the flow direction of the runoff wat...

Embodiment 3

[0038] First, remove the original concrete slope protection and floor of the farmland drainage ditches;

[0039] Then slope the bottom of the ditch according to the slope of 2.5% 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 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 15 cm. Grid structure, reinforced soil slope.

[0040] At the same time, set 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.

[0041] Vetiver is planted in the side slope grid of the ditch, and clover clover, canna and quince are planted in sequence at the bottom according to the flow direction of the runoff water in the drainage ditch.

[0042] The monitoring results of Example 3 show tha...

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Abstract

The invention relates to a pollution control method of farmland drainage in a plain tidal river network area, belonging to the technical field of environmental protection. The pollution control method comprises the following steps of: preliminarily clearing up a drainage ditch, and respectively sloping the bottom and the side slopes of the ditch along the farmland runoff water drainage direction to prepare ecological drainage ditch; then, reinforcing the side slopes of the ecological drainage ditch by using slates or porous water-permeable plates, and cultivating ecological plants on the side slopes and the bottom of the ecological drainage ditch in sequence; and finally, arranging a water collection tank at the junction part of the farmland drainage and the ecological drainage ditch. Runoff water flows into a river after being purified by the ecological drainage ditch. The invention has the characteristics of simplicity, convenience, practicability, good purification effect, good landscape effect and the like.

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 using ecological drainage ditches. 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 environ...

Claims

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Application Information

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IPC IPC(8): E02B11/00E02B5/00E02B5/02C02F3/32A01G1/00
CPCY02W10/10
Inventor 邱卫国唐浩邱江平
Owner SHANGHAI JIAO TONG UNIV
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