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Regulation and control method for improving retention potential of nutritive salt in stream ditch

A nutrient salt and stream technology, which is applied in the field of regulation to improve the retention potential of nutrient salt in streams and ditches, can solve problems such as the reduction of water body self-purification ability, and achieve the effects of convenient implementation, prolonging hydraulic retention time, and easy calculation and determination

Pending Publication Date: 2021-10-19
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, with the burning of fossil fuels, excessive fertilization of farmland, and the acceleration of urbanization, the nutrient (such as nitrogen, phosphorus, etc.) The self-purification ability of the water body is gradually reduced, which leads to limitations in the retention potential of nitrogen, phosphorus and other nutrients in traditional natural streams and ditches, especially in rivers with a high degree of nutrition, which has a great impact on alleviating nitrogen and phosphorus pollution and eutrophication of downstream water bodies. is very disadvantageous

Method used

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  • Regulation and control method for improving retention potential of nutritive salt in stream ditch
  • Regulation and control method for improving retention potential of nutritive salt in stream ditch
  • Regulation and control method for improving retention potential of nutritive salt in stream ditch

Examples

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Effect test

Embodiment 1

[0022] A control method for improving the retention potential of nutrient salts in stream ditches, comprising the following steps:

[0023] (1) Mix hollow bricks with a particle size range of 5cm-10cm, a fineness modulus of 3.1-3.7, and coarse sand and soil with an average particle size of more than 0.5mm according to a mass ratio of 1:1:8. The spur dam structure is made by putting it into a nylon bag, and the soil is a layer of loose material on the surface, which is composed of various granular minerals, organic matter, water, etc. Among them, the organic matter content accounts for 1.5% of the dry weight of the soil, and the humus accounts for organic matter. 82.1% of the total.

[0024] (2) The above-mentioned spur dike structure is arranged on one side of the stream to set a plurality of laying sections with an interval of 6m, and the laying section width is 30cm, the height is 10cm above the water surface, and the length is 40% of the stream width.

Embodiment 2

[0026] A control method for improving the retention potential of nutrient salts in stream ditches, comprising the following steps:

[0027] (1) Mix hollow bricks with a particle size range of 5cm-10cm, a fineness modulus of 3.1-3.7, and coarse sand and soil with an average particle size of more than 0.5mm according to a mass ratio of 1:1:8. The spur dam structure is made by putting it into a nylon bag, and the soil is a layer of loose material on the surface, which is composed of various granular minerals, organic matter, water, etc. Among them, the organic matter content accounts for 1.5% of the dry weight of the soil, and the humus accounts for organic matter. 82.1% of the total.

[0028] (2) The above-mentioned spur dam structure is arranged on one side of the stream to set a plurality of laying sections at intervals of 6m, and the laying section width is 30cm, the height is 10cm above the water surface, and the length is 60% of the stream width.

Embodiment 3

[0030] A control method for improving the retention potential of nutrient salts in stream ditches, comprising the following steps:

[0031] (1) Mix hollow bricks with a particle size range of 5cm-10cm, a fineness modulus of 3.1-3.7, and coarse sand and soil with an average particle size of more than 0.5mm according to a mass ratio of 1:1:8. The spur dam structure is made by putting it into a nylon bag, and the soil is a layer of loose material on the surface, which is composed of various granular minerals, organic matter, water, etc. Among them, the organic matter content accounts for 1.5% of the dry weight of the soil, and the humus accounts for organic matter. 82.1% of the total.

[0032] (2) The above-mentioned spur dike structures are arranged on one side of the stream to set a plurality of placement sections with an interval of 6m, and the width of the placement sections is 30cm, and the height is 10cm above the water surface. The lengths of two adjacent placement section...

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Abstract

The invention provides a regulation and control method for improving the retention potential of nutritive salt in a stream ditch, and relates to the technical field of water environment ecological restoration. The regulation and control method mainly comprises the steps that gravel, coarse sand and soil serve as materials and are put into nylon bags according to different proportions, and spur dike structures are manufactured; then, placing sections are arranged along a stream river channel at intervals of 6 m, one spur dike structure with the width ratio of 40%-60% is arranged on each placing section, or the spur dike structures with the width ratios of 40%-50% and 50%-60% are arranged on every two adjacent placing sections respectively, and all the spur dike structures are placed at the same side of the stream; and a spur dike structure group is formed in the river channel. According to the method, the defects in the prior art are overcome, the riverbed characteristics and the water flow layout of the stream ditch are changed, the hydraulic retention time of the nutritive salt in the stream is prolonged, and the method is easy to operate, low in operation cost, obvious in benefit, environmentally friendly and worthy of wide application and popularization.

Description

technical field [0001] The invention relates to the technical field of water environment ecological restoration, in particular to a control method for improving the retention potential of nutrients in streams and ditches. Background technique [0002] As an important part of the basin ecosystem, source streams account for 70% to 80% of the total length of rivers and river networks; , stagnant water areas and transient storage areas formed by various other factors (low-quality streams, channel shapes, etc.). Therefore, in the basin water ecosystem, the stream plays an important environmental ecological function of nutrient retention, transformation and removal. Numerous studies have shown that more than 60% of the nutrients are stranded in streams with lower grades, while only about 10% are stranded in rivers with higher grades. Therefore, the study of nutrient retention in streams is of great significance to control and reduce the transport of nitrogen and phosphorus nutri...

Claims

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Application Information

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IPC IPC(8): E02B3/00E02B3/10E02B7/00E02B8/00C02F9/02
CPCE02B3/00E02B3/106E02B3/108E02B7/00E02B8/00C02F1/001C02F1/286
Inventor 李如忠刘超傅扬
Owner HEFEI UNIV OF TECH
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