Water temperature distribution changing observation method and system after confluence of reservoir muddy water density flow

Abstract

The present invention discloses a water temperature distribution changing observation method and system after confluence of reservoir muddy water density flow. The method provided by the invention is configure to observe the dynamic changing rules of water temperature structures of the vertical direction, the section horizontal direction and the water body vertical direction of a downstream reservoir area according to the flow, the parameter mixing development and the changing conditions of the reservoir muddy water density flow of the temperature layering reservoir area branch confluence along the way at the downstream after the confluence of temperature layering reservoir muddy water density flow to ensure the systematicness, the representativeness and the reliability of water temperature structure distribution changing observation accomplishment after the confluence of the reservoir muddy water density flow. The system comprises a plurality of observation sections and a plurality of observation vertical lines laid at the reservoir area, and corresponding observation points laid on the observation vertical lines, and the observation points are provided with corresponding water temperature observation instruments. According to the invention, the system observation work technology level and the accomplishment quality of water temperature changing and distribution rules of water bodies such as rivers, reservoirs and the like, and the deficiencies in the prior art are overcome.

Description

technical field [0001] The invention relates to a method and system for observing changes in water temperature distribution after muddy water inflows and confluences of different concentrations in a reservoir, and belongs to the technical field of hydrological observation of water conservancy and hydropower projects. Background technique [0002] Hyperpycnal flow refers to the stratified flow caused by the difference in fluid density in the gravity field, also known as density flow or gravity flow. In terms of water flow, the hyperpycnal flow formed due to the flow of sediment is called muddy water hyperpycnal flow, in which: the turbid river water flowing into the reservoir dives into the bottom of the reservoir, moves forward along the bottom of the reservoir under the clear water of the reservoir, and forms a reservoir Muddy-water hyperpycnal flow: When two rivers meet, when the sediment content of each flow is different, layered movement can occur at the junction, formin...

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Problems solved by technology

[0004] At present, there are few studies on the mechanism of the influence of the hyperpycnal flow of muddy water from the tributaries of the water temperature stratified reservoir area on its influence on the water temperature distribution structure of the water temperature stratified reservoir area within a certain range downstream, especially for the muddy water of the reservoir. The systematic observation and research on the change of water temperature structure distribution after the hyperpycnal inflow and influx is still in a blank stage. The technical methods and requirements for the observation of the water temperature structure distribution change after the hyperpycnal inflow and influx of reservoirs lack the effective unity of relevant guidelines or norms, and the observation results The quality generally has problems such as systematicness, representativeness, and low reliability. It has little reference significance for improving the mathematical model of the water temperature change law of rivers and reservoirs in my country, the improvement of empirical formulas, and the development of calculation software. Guiding the scientific development of the research work on the environmental impact system of the reservoir area of ​​water conservancy and hydropower projects

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