Lowest navigable water level generating method of downstream river of reservoir

Abstract

The invention discloses a lowest navigable water level generating method of a downstream river of a reservoir; and the method comprises a step of determining designed navigable flow of the downstream river of the reservoir, a step of predicating same-flow water level drop in a dry period of the river and a step of figuring out the lowest navigable water level of the river. Compared with the traditional method, the lowest navigable water level generating method disclosed by the invention has the advantages as follows: to suit the actual scouring and silting process of the downstream river of the reservoir, the design water level of the river at one time in the future can be more simply and accurately predicated through analyzing the water level variation rule and water level variation causes of the river and using adaptive methods for different rivers; moreover, the data needed by the method are easier to collect than those needed by the traditional method, and stronger practicability is achieved.

Description

technical field [0001] The invention relates to the technical field of water conservancy waterways, in particular to a method for generating the lowest navigable water level of a river downstream of a reservoir. Background technique [0002] The minimum navigable water level of a river is a basic parameter of channel planning and design, and is also an important indicator of channel regulation projects. The correctness of the minimum navigable water level is directly related to the navigation safety and navigation benefits of the channel. Therefore, the research on the generation method of the minimum navigable water level is extremely important. important. The current determination method of the water level is based on the condition that the river bed has little change in erosion and siltation, and is directly calculated by using the statistical method of the river water level data. The construction and water storage of the reservoir changes the water and sediment conditio...

AI Technical Summary

Problems solved by technology

The construction and water storage of the reservoir changes the water and sediment conditions in the downstream sections of the dam. On the one hand, the regulation and storage of runoff by the reservoir changes the annual process of the incoming water downstream of the dam. On the other hand, the sand blocking effect of the reservoir will cause clear water to discharge, the downstream riverbed will be scoured from top to bottom, and the large-scale deformation of the riverbed will cause the adjustment of the water level and flow relationship in the river section. The dry water level of the section is in a state of change and adjustment for a long time, so the existing natural river design water level calculation method is no longer applicable

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