Method and system for observing water temperature structural damage effect under reservoir flood impact

Abstract

The invention discloses a method and system for observing water temperature structural damage effect under reservoir flood impact. The method comprises following steps: time distribution regularity and space distribution regularity of the water temperature dynamic change under reservoir flood impact are observed, and the space distribution regularity of river way cross section observation vertical lines of water structural damage effect under reservoir flood impact is observed on the basis of the reality of a flood occurring process, a developing process and a dying away process when flood enters a reservoir, and in combination with river way longitudinal and cross section vertical water temperature dynamic change regularity in three water temperature distribution characteristic regions, wherein the water temperature distribution characteristic regions are a dam front water temperature layering region, a middle reservoir water temperature intermediate region, and a tail reservoir water temperature mixing region of a layering reservoir; the system comprises multiple observation sections and observation perpendicular lines uniformly distributed in the dam front water temperature layering region, the middle reservoir water temperature intermediate region, and the tail reservoir water temperature mixing region. The method and system are of great importance in increasing the technical level and achievement quality of water temperature change and distribution regularity systematic observation work of water bodies such as rivers and reservoirs, and are of great importance in pushing the industry technology development.

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 damage effect of water temperature and structure under flood shock of a reservoir. Background technique [0002] Water conservancy and hydropower projects and other river-blocking hydraulic structures have changed the hydrological situation and water environment in the reservoir area. The reservoir not only adjusts the water storage capacity but also stores heat, which may lead to the stratification of water temperature in the reservoir area and the stratification of river water temperature. Type reservoirs are generally divided into three water temperature distribution characteristic areas on the longitudinal channel: the water temperature stratification area in front of the dam, the water temperature transition area in the reservoir, and the water temperature mixing ar...

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Problems solved by technology

[0008] At present, there are few studies on the mechanism of the influence of different flood inflow processes on the three water temperature distribution characteristics of the water temperature stratification area in front of the stratified dam, the water temperature transition area in the reservoir, and the water temperature mixing area at the tail of the reservoir, especially for water temperature stratified reservoirs. Under the impact of floods (a flood with more than half of the total storage capacity of water-temperature-stratified reservoirs, that is, β>0.5), the vertical distribution of the reservoir channel and the water temperature structure of the layered distribution on the vertical section of the reservoir are destroyed The observation and research of the effect of water temperature is still in a blank stage. The technical methods and requirements for the observation of the effect of water temperature structure damage under the impact of reservoir floods lack the effective unity of relevant guidelines or specifications, and the quality of observation results is generally systematic, representative, and unreliable. It is of little reference significance to improve the mathematical model research on the water temperature change law of rivers and reservoirs in my country, the improvement of empirical formulas and the development of calculation software, and it cannot guide the research work of the environmental impact system of water conservancy and hydropower engineering reservoir areas. Scientific development

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