Step sand-blocking dam ecosystem for reservoir desilting and sand prevention

An ecosystem and sand dam technology, applied in the direction of dams, barrages, barrages, etc., can solve the problems of serious reservoir siltation, affecting the safety and normal operation of the reservoir, and achieve the effect of good ecological function, good water permeability and easy promotion

Inactive Publication Date: 2015-11-18
NANJING HYDRAULIC RES INST
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Problems solved by technology

[0004] The current reservoir dredging technology is basically blank, and more than 90,000 reservoirs in China currently have sedimentation problems, especially in the northwest region due to serious soil erosion, and the reservoirs are seriously silted. For example, the Kizil reservoir in Xinjiang has a design storage capacity of 700 mil

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  • Step sand-blocking dam ecosystem for reservoir desilting and sand prevention
  • Step sand-blocking dam ecosystem for reservoir desilting and sand prevention

Examples

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Embodiment 1

[0035] Example 1, such as figure 1 As shown, in the upstream channel outside the backwater area of ​​the reservoir, according to the terrain conditions, select a reasonable location as the dam site for the construction of the sand retaining dam, and perform simple regional leveling on the dam site for the construction of the sand retaining dam; use the reservoir to clear the silt As the filling material, the large-scale filling bag technology is used to fill the lower dam body of the sand retaining dam with 2 to 4 layers (1 to 2m high) in layers; the upper part of the sand retaining dam is constructed with gabion nets on the upper part of the sand retaining dam filled with bags The body of the sand retaining dam shall be protected and ecologically restored by adopting ecological protection for the surface of the dam body and the upstream and downstream areas using reasonable ecological protection and restoration technologies. This technology invented the use of local materials...

Embodiment 2

[0038] Example 2, such as figure 2 After the first-level ecological sand-retaining dam 10 in the adjacent reservoir area is filled with sand, adopt the present technology to build ecological sand-retaining dams 11, 12..., The upper-level ecological sand-retaining dam adopts large-scale filling bag technology to construct the sand-retaining dam. The filling material required for the construction of the sand-retaining dam directly uses the sediment formed by the retention of the lower-level sand-retaining dam, and builds a cascaded sand-prevention ecological system in the upstream river of the reservoir that needs anti-silting and dredging. Combined with other ecological protection technologies of the reservoir, including the control and protection technology of water and soil loss in the reservoir area and the ecological prevention and control technology of the bank slope of the reservoir area, the level of ecological protection of the reservoir will be improved, and on the bas...

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Abstract

Provided is a step sand-blocking dam ecosystem for reservoir desilting and sand prevention. According to topographical conditions, a reasonable position is selected, in the outer river segment of the upstream backwater area of the reservoir area, as a dam site where a sand-blocking dam is built. The dam site where the sand-blocking dam is built is leveled by areas. The lower filling bag dam body of the sand-blocking dam is built by segments and layers on a cleared and leveled river bed by adopting large reservoir desilting soil filling bag technology; the upper dam body of the sand-blocking dam is built by adopting gabion boxes. Ecological restoration and protection are conducted on the surface of the sand-blocking dam, and ecological restoration is conducted on rivers in the upstream and downstream areas of the sand-blocking dam. According to the step sand-blocking dam ecosystem for reservoir desilting and sand prevention, reservoir area desilting soil is used for building the dam and an ecological protection slope surface, so that not only is building cost reduced, but also ecological management and protection are combined into a whole by using local resources; water and soil loss in the reservoir area can be reduced, the ecological environment of the reservoir upstream area and surrounding areas is significantly improved. The step sand-blocking dam ecosystem for reservoir desilting and sand prevention is suitable for siltation prevention and treatment and ecological management work of reservoirs with heavy vegetation damage, ecological environment deterioration and heavy water and soil loss in large reservoir areas in central and western regions.

Description

technical field [0001] The invention belongs to the field of water conservancy engineering, and in particular relates to a cascaded sand retaining dam ecological system for reservoir dredging and sand prevention. Governance work. [0002] This patent is funded by the Ministry of Water Resources' public welfare industry scientific research project "Complete technology research on ecological control of small and medium-sized rivers and their bank slopes in the west (No: 201301022)". Background technique [0003] Reservoir siltation is an unresolved major problem in water conservancy and hydropower construction in the world. In recent years, the International Conference on Large Dams, the International Conference on Irrigation and Drainage, the International Conference on Hydraulics and many countries have begun to pay attention to the research of this subject. Reservoir siltation is that after the water flow enters the reservoir area, because the water depth increases along ...

Claims

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Application Information

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IPC IPC(8): E02B7/06
Inventor 何宁张桂荣何斌汪璋淳李登华钱亚俊王国利周彦章张宏科阿不都沙拉木．玉山徐凯陶茂松陈超张中流许滨华姜彦彬梅聚福张贤黄宙晟倪明
Owner NANJING HYDRAULIC RES INST
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