【7/12更新】2022年4月1日からのCiNii ArticlesのCiNii Researchへの統合について

Chemical properties of ground water in chinena village, central zambia

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Water samples were collected and analyzed chemically in the Chinena village, central Zambia. There are four main dambos in this village. The ground water of the upper area has a low concentration of chemical constituents, and the ground water of the middle part has a high concentration of chemical constituents. The ground water which has high electric conductivity indicates high concentrations of Ca^<2+> and Mg^<2+>. The ground water which indicates high pH contains high concentrations of HCO_<3> and Mg^<2+>. The concentration of Na^<+> has a mutual relation with the concentration of Cl^<->. There are two types of ground water in the village; i.e. NaCl type and MgCO_<3> or CaCO_<3> type. Water holes are classified by using the chemical property of sampled water. As the first step of classification, the principal components analysis is adopted. The first principal component is thought to be factor which expresses the ratio of NaCl type water. The second principal component is considered to be factor which expresses the alkalinity of water. The third principal component is thought to be factor which expresses the effect of fertilizer and chemicals on water quality. As the second step of classification of chemical property of ground water, the cluster analysis is adopted. Five groups are classified by a criterion of the squared Euclidean distance. Distribution of each group is almost parallel with contour lines. This distributions are thought to be affected by the lithologic conditions and the flow pattern of ground water in the Chinena village.

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