A water storage and sediment discharge separation system for large and medium-sized reservoirs in sandy rivers during the flood season

Abstract

The invention relates to a large and medium-sized reservoir for a sandy river, in particular to a reservoir for solving the problem of insufficient water storage in the subsequent flood season caused by precipitation and sediment discharge in the flood season, belonging to the field of water conservancy engineering, and its IPC classification number is E02B1 / 00, E02B 3 / 02. The invention divides a single reservoir area into a water storage area, a sand discharge area and a regulation area by building a "flood season water storage and sand discharge separation system" in the reservoir, and the three are connected through rubber dam groups. The water storage area stores clean water for a long time, and when the precipitation in the sand discharge area washes away, it can ensure that the water storage area still has a certain amount of backup water resources; using the adjustment area, it is convenient and flexible to use the clean water in the water storage area or sand discharge area to generate electricity , to prevent the damage to the power station caused by the flow of coarse sand in the sand discharge area. The "flood season water storage and sediment discharge separation system" system of the present invention solves the contradiction between large and medium-sized reservoir water storage for profit and flood discharge and sediment discharge, and does not affect the overall flood control operation of the reservoir during flood season.

Description

technical field [0001] The invention relates to a large and medium-sized reservoir for a sandy river, in particular to a reservoir for solving the problem of insufficient water storage in the subsequent flood season caused by precipitation and sediment discharge in the flood season, belonging to the field of water conservancy engineering, and its IPC classification number is E02B 1 / 00, E02B 3 / 02. Background technique [0002] There are a large number of large and medium-sized reservoirs in my country, which are widely distributed and play a huge role in power generation, irrigation, water supply and flood control. However, with the passage of time, many large and medium-sized reservoirs in sandy rivers have reduced their storage capacity due to severe sedimentation, and their water storage capacity has weakened, resulting in the ineffective use of rainwater resources. If mechanical desilting technology is used to discharge all the silt deposited in the reservoir, not only ...

AI Technical Summary

Problems solved by technology

The operation of lowering the water level during the flood season is beneficial to the sediment discharge of the reservoir, but it affects the water storage in the reservoir area during the flood season, which in turn affects the function of the reservoir, thus inducing the contradiction between the flood discharge and sediment discharge of large and medium-sized reservoirs and the water storage in the reservoir area.

At the same time, since a large amount of coarse-grained sediment is often deposited near the water inlet of the power station, when water is diverted for power generation, this part of the deposited sediment enters the hydropower station, causing serious abrasion to the turbine.

At present, there is no precedent for large and medium-sized reservoirs of sandy rivers to store clean water for a long time in the reservoir area in front of the dam, adjust the water diversion of the power station in the regulation area, and restore the storage capacity by precipitation and sand discharge in the sand discharge area.

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