A method and system for observing dynamic changes in vertical water temperature in the backwater area of ​​a reservoir

Abstract

The invention discloses an observation method and system for the vertical water temperature dynamic change of backwater areas of a reservoir. The method comprises the steps of observing period distribution, the working accuracy and the working representative actuality according to the water level and water temperature change characteristics of the reservoir and different water temperatures, observing the spatial distribution law and the time distribution law of the vertical water temperature dynamic change of the backwater areas of the reservoir according to the vertical water temperature dynamic change law of characteristic areas of the backwater areas of the reservoir, and distributing observation vertical lines and vertical line measurement points of the vertical water temperature dynamic change of the backwater areas of the reservoir. The system comprises the all-year reservoir backwater area, the fluctuating reservoir backwater area and the reservoir backwater terminal area, a plurality of observation sections of the spatial distribution law of the vertical water temperature dynamic change are respectively arranged in the all-year reservoir backwater area, the fluctuating reservoir backwater area and the reservoir backwater terminal area, and a water temperature observation instrument is arranged in each observation section. According to the method and the system, the systematicness, the representativeness and the reliability of the observation results of the vertical water temperature dynamic change law of the backwater areas of the reservoir are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of hydrological observation of water conservancy and hydropower projects, and in particular relates to a method and system for observing the dynamic change of vertical water temperature in a backwater area of ​​a reservoir. Background technique [0002] After the construction of water conservancy and hydropower projects and other hydraulic constructions that block rivers, the hydrological situation and water environment of the reservoir area have been changed. The reservoir not only regulates and stores water, but also stores heat, which will lead to stratification of water temperature in the reservoir area. Theoretically, the river Stratified reservoirs are generally divided into three water temperature distribution characteristic areas in the longitudinal direction of the river channel: the water temperature stratification area in front of the dam, the water temperature transition area in the reservoir, and...

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Problems solved by technology

[0004] However, theoretically, the three "water temperature distribution characteristic areas" of the water temperature stratification area in front of the dam, the water temperature transition area in the reservoir, and the water temperature mixing area at the tail of the reservoir area of ​​the water conservancy and hydropower project are different from the actual near-dam section of the backwater area of ​​the reservoir. The research on the coupling effect relationship between the three "water level operation characteristic areas" of the backwater area, the variable backwater area in the reservoir, and the backwater end area at the end of the reservoir, as well as the related impact research, is still in a blank stage. It is aimed at the observation and research of vertical water temperature dynamic changes and related effects in the reservoir backwater area. The technical methods and requirements for the observation of vertical water temperature dynamic changes in the reservoir backwater area lack effective unification of relevant guidelines or specifications, and the quality of observation results is generally systematic. It is of little reference significance for improving the mathematical model research on water temperature change laws of rivers, reservoirs and other water bodies in China, the improvement of empirical formulas and the development of calculation software, etc., and it cannot be a good guide for water conservancy and hydropower. The scientific development of the research work on the environmental impact system of the project reservoir area

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