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针对高坝泄洪可能造成大坝下游水体溶解氧过饱和给下游水生生物带来较大影响的问题,采用主成分分析法对三峡—葛洲坝坝下近坝区溶解氧过饱和主要影响因素的权重进行了分析,得出对坝下近坝区溶解氧饱和度影响最大的是泄洪方式、泄洪建筑物总泄洪量、坝上溶解氧饱和度、水电站泄流量、上下游水位。可为有效控制三峡—葛洲坝区域下游近坝区气体过饱和问题提供借鉴。
In view of the problem that discharge from high dam may cause the supersaturation of dissolved oxygen in the downstream of the dam to have a greater impact on downstream aquatic organisms, the weight of the main influencing factors of dissolved oxygen supersaturation near the Three Gorges-Gezhouba dam by principal component analysis The analysis shows that the most influential factors on dissolved oxygen saturation in dam area near the dam are flood discharge mode, total discharge of flood discharging buildings, dissolved oxygen saturation at dam, discharge amount of hydropower station and upper and lower water level. It can provide reference for effectively controlling the gas supersaturation in the dam area downstream of the Three Gorges-Gezhouba Dam.