摘要
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。
High dam discharge may cause the supersaturation of dissolved oxygen for downstream water,which will bring great impacts on the aquatic organism in downstream.The weighing of the main influencing factors in dissolved oxygen supersaturation at the downstream of Three Gorges and Gezhouba dam is analyzed by using principle component analysis method.Conclusion is drawn that the main influence factor is the system of flood discharge,the total flood discharge of flood releasing structure,the dissolved oxygen saturation above the dam,the discharge of hydropower station,the water lever of upper and lower reaches.It can provide reference for effective control of the total dissolved gas supersaturation downstream of the Three Gorges and Gezhouba dam.
出处
《水电能源科学》
北大核心
2010年第11期94-96,173,共4页
Water Resources and Power
基金
国家杰出青年基金资助项目(50925932)
国家自然科学基金资助项目(50979050)
关键词
大坝泄流
溶解气体饱和度
影响因子
主成分分析法
dam discharge
dissolved gas saturation
influencing factor
principle component analysis
