CAJ | 학술논문

运用聚类分析和主成分分析方法，对向家坝水库蓄水期间金沙江干流6个断面11个水质参数的变化情况进行了分析。分析认为，金沙江干流采样断面可分为两组，即上游断面和中下游断面，其中，上游断面水质参数可概括为4个主成分，中下游断面可概括为5个主成分。此外，结合向家坝库区蓄水情况，分析了上游断面4个主成分随水位的变化规律，结果表明，随着库区水位上升，由于水体中泥沙的沉降作用以及上游来水的稀释作用，各水质参数含量明显降低，蓄水后水质明显优于蓄水前。
운용취류분석화주성분분석방법，대향가패수고축수기간금사강간류6개단면11개수질삼수적변화정황진행료분석。분석인위，금사강간류채양단면가분위량조，즉상유단면화중하유단면，기중，상유단면수질삼수가개괄위4개주성분，중하유단면가개괄위5개주성분。차외，결합향가패고구축수정황，분석료상유단면4개주성분수수위적변화규률，결과표명，수착고구수위상승，유우수체중니사적침강작용이급상유래수적희석작용，각수질삼수함량명현강저，축수후수질명현우우축수전。
This paper analyzes the changes of 11 water quality parameters at 6 sections in the mainstream of Jinsha River dur-ing impoundment of Xiangjiaba Reservoir by cluster analysis and main composition analysis. It is considered that the sampling sections can be divided into two groups, namely, upper sections and mid-lower sections;the former has 4 main components for parameters and the latter has 5 main components. The changing rules of 4 main components of the upper sections are analyzed with consideration of the impoundment of Xiangjiaba Reservoir. The result indicates that the content of each water quality parame-ter is obviously lowered and the water quality after impoundment is apparently better than before along with the rising water level of reservoir, because of the effect of sedimentation and the dilution of water from upper reaches.