Wave dissipating method for improving basic environment of large shallow lake

A shallow water and lake technology, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as poor wave dissipation effect, influence of growing season, and vulnerability to wind and wave damage

Active Publication Date: 2014-12-03
NANJING INST OF GEOGRAPHY & LIMNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Flexible material wave dissipation method, the wave dissipation effect is relatively poor, especially floating aquatic higher plants are also vulnerable to damage by wind and waves, and are affected by the growing season

Method used

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  • Wave dissipating method for improving basic environment of large shallow lake
  • Wave dissipating method for improving basic environment of large shallow lake
  • Wave dissipating method for improving basic environment of large shallow lake

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Analysis of the main environmental factors affecting floating plants

[0033] Wind and waves have a major impact on the growth of floating plants, causing direct mechanical damage. If effective measures are not taken, it will be difficult for plants to grow in the wind and wave area of ​​the lake. Experiments have shown that the introduction of Litella philodendron into the enclosure, the coverage is 100%, and the cumulative loss reaches 60% in less than a month, which shows that it is not easy to restore floating plants in the stormy area of ​​the lake. This is due to the up-and-down motion of the waves, which causes the roots, stems and leaves of floating plants to move relative to each other and damage each other. In the natural state, the amount of damage is much greater than the amount of growth, so it is almost impossible to survive normally. There is no precedent for long-term successful cultivation. Therefore, the implementation of wave suppression projects...

Embodiment 2

[0051] Compared with Example 1, the only difference is that the concrete piles adopt a single row of piles, the piles are arranged in a diamond shape in the direction of facing waves, and the distance between two adjacent piles is 10cm. The observation results show that the wave penetration rate of the single row of piles for various wave heights is between 0.63-0.74, and the wave dissipation effect is significantly lower than that of Example 1. Therefore, the layout of double-row concrete piles is more conducive to wave dissipation.

Embodiment 3

[0053] Compared with Example 1, the only difference is that the distance between the two piles in the front row is 50cm, the piles in the back row are inserted evenly between the piles in the front row in turn, and the distance between the piles in the front row and the pile row direction is It is 10cm. Observation found that the wave transmission rate of this interspersed concrete pile laying method is above 0.7, which is significantly higher than that of Example 1. Therefore, it is better to arrange the concrete piles in two rows and maintain a certain distance between them.

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Abstract

The invention belongs to the technical field of ecological restoration and provides a wave dissipating technology for improving basic environment for restoration of aquatic plants in a large shallow lake. Specific to that wind wave perturbance of the large shallow lake is large, an engineering wave dissipating member comprises concrete piles and bamboo rafts, the concrete piles are distributed around a defense area to defend stormy waves, and matched with the bamboo rafts inside the defense area to improve defense effect. The concrete piles are distributed in a staggered manner to form wave dissipating zones to baffle, reflect and break waves and friction of water and the piles so as to reduce waves in the target area; the wave dissipating bamboo rafts are fixed on anchor piles, and waves are broken and eliminated by relative motion of floating floor members of the bamboo rafts and the water body. By the wave dissipating technology, wave affection of the lake can be reduced, resuspension of sediments is controlled, the basic environment is provided for restoration of the aquatic plants in the lake, and a purpose for improving water quality is achieved.

Description

technical field [0001] The invention belongs to the technical field of ecological restoration, and relates to a wave dissipation method for improving the basic environment of large shallow lakes. Background technique [0002] Wind and waves have very complex effects on aquatic higher plants. The survey found that the higher aquatic plants in Taihu Lake are generally distributed in the coast, bays and other waters, and the water depth is generally within 2m. In open water areas, it is difficult to have higher aquatic plants. Only in lakes and bays and other waters with less wind and waves in Taihu Lake can higher aquatic plants grow and develop; while in open waters such as West Taihu Lake, almost no aquatic higher plants can be seen, only occasionally found on the edge of the net where fishermen cast their nets Sporadic submerged plants, or only when the surrounding environment undergoes essential changes, will aquatic higher plants grow. [0003] Wind and waves have dire...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B3/06C02F3/32
Inventor 秦伯强董百丽胡维平
Owner NANJING INST OF GEOGRAPHY & LIMNOLOGY
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