Siltation reduction method for reservoir

Abstract

The invention relates to a siltation reduction method for a reservoir, and belongs to a general method in the field of water conservancy. The IPC of the siltation reduction system is E02B1 / 00 and E02B9 / 02. According to the method, a submerged sediment control dam is built in the reservoir to divide the reservoir into a clear water reservoir region and a muddy water reservoir region, a sand conveying culvert is adopted to discharge water flow containing sand far away from the upstream of the dam out of the reservoir, dual purposes of water storage of the reservoir and sand discharging are achieved, and the reservoir precipitation erosion distance is widened; tiny particle silt turning over the submerged sediment control dam to the reservoir region in front of the dam is discharged out of the reservoir through dam flood discharging tunnels in a submersible sand pump reservoir dredging manner; and for wide, shallow and curved deposition forms in the watercourses of the reservoir regions, smooth and straight reservoir river channels beneficial to density flow transport are built in a submersible sand pump sand-excavating dredging manner, and the natural sand discharging effect is improved. The siltation reduction system is suitable for heavy sediment-laden river reservoir building and deposited waste reservoir reformation engineering.

Description

Technical field: [0001] The invention relates to a method for general water conservancy engineering, in particular to a method for reducing siltation in sandy river reservoirs. Its IPC international patent classification numbers E02B1 / 00 and E02B9 / 02 belong to the field of water conservancy. Background technique: [0002] With the development of economy and society, human beings have more and more demands on the development and utilization of rivers, and more and more water conservancy projects are built on rivers. In particular, a considerable number of reservoirs in sandy rivers have lost their normal water storage function due to severe sedimentation. The dams and their ancillary buildings built for water storage and profit also lost their functions, resulting in a shortage of resources. Serious waste; at the same time, with the endless development of rivers by human beings, there are fewer and fewer dam sites suitable for building reservoirs on rivers, which are far from...

AI Technical Summary

Problems solved by technology

[0002] With the development of economy and society, human beings have more and more demands on the development and utilization of rivers, and more and more water conservancy projects are built on rivers. In particular, a considerable number of reservoirs in sandy rivers have lost their normal water storage function due to severe sedimentation. The dams and their ancillary buildings built for water storage and profit also lost their functions, resulting in a shortage of resources. Serious waste; at the same time, with the endless development of rivers by human beings, there are fewer and fewer dam sites suitable for building reservoirs on rivers, which are far from meeting the requirements of social development for the development and utilization of water resources, and further development and utilization of water resources are needed Support the sustainable development of the economy and society; on the other hand, with the strengthening of environmental protection and the improvement of people's living standards, soil and water conservation has made considerable progress and remarkable results, coupled with the continuous advancement of sediment resource utilization and silt land reclamation , the amount of sediment entering the reservoir is significantly reduced, and it is possible to use the natural sediment discharge of the reservoir combined with manual dredging and dredging to maintain the sustainable use of the reservoir

In the past, the construction of water conservancy projects mostly consisted of building a dam to form a single reservoir, mainly using the dead storage capacity to retain sediment and discharge sand with different density currents. Some reservoirs have also carried out simple manual dredging and dredging of reservoirs. There is no precedent for the construction or reconstruction of water conservancy projects in two reservoir areas of clear water and muddy water by combined use of sediment-retaining submerged dams, and there is no precedent for reservoir dredging to be discharged out of the reservoir through the supporting buildings of the dam

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