河川水質の統計学的研究-2-長野県内千曲川水質への多変量解析の適用

概要

論文の詳細を見る
We tried to investigate the fluctuation of water Qualities of CHIKUMA River in NAGANO Prefecture, by means of the correlation analysis, the principal compoents analysis and the factor analysis. Numerical values were obtained from the Tables of the water analysis of the public area from 1973 to 1977. As the fluents, the values of water temperature, pH, DO, BOD, COD and SS were used. The following items were summarized: 1. The correlation analysis suggested that the organic materials detected in the fraction of SS were mainly measured to be COD. 2. From the principal components analysis, the first principal components were the character of the total pollution, the second ones were those of the pollution by the organic substances, the third ones were those of pH and water temperature. 3. From the factor analysis, we classified the ten points measured into the four groups and clarified the progress of the pollution along the lower parts of the stream.
信州大学農学部の論文