A silt reduction system for sandy river reservoirs

Abstract

The invention relates to general hydraulic engineering, in particular to a silting reduction system for a heavily silt-carrying river reservoir. The IPC numbers are E02B1 / 00 and E02B9 / 02. According to the system, a silt-blocking submerged dike is constructed in the reservoir, the reservoir is divided into a clean water reservoir area and a muddy water reservoir area, a silt conveying culvert is utilized for efficiently draining silt-carrying flow in the distance of the upstream of the dike out of the reservoir, the aims of water storage and silt discharging are achieved at the same time, and the rainfall washing distance of the reservoir is enlarged; fine-particle silt turned and overflowed to the area, in front of the dike, of the reservoir through the silt-blocking submerged dike is discharged out of the reservoir through a dike tunnel spillway in a submerged silt pump reservoir desilting mode; according to a wide, shallow and bent silting form occurring on a reservoir area riverway, a reservoir area straight river channel facilitating density flow transport is built in a submerged silt pump dredging mode, and the natural desilting effect of the reservoir is improved. The system is applicable to heavily silt-carrying river reservoir construction and silting waste reservoir reconstructed projects.

Description

Technical field: [0001] The invention relates to a general water conservancy project, in particular to a project for reducing sedimentation in sandy river reservoirs. The IPC International Patent Classification No. E02B 1 / 00, E02B 9 / 02 belongs 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 meeting the r...

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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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