摘要：The paper attempts an examination of the relationships between water chemistry and depth of hand- dug wells in a densely populated (16,679-people/km 2 ) part of Ibadan, Nigeria. Multivariate procedures of multiple and stepwise regression analyses were adopted. Results of the multiple regression and correlation shoed that Coliform count., pH , total hardness (TH), calcium (Ca + ),magnesium (Mg + ), iron (Fe + ) and chloride (Cl - )increase with increasing depth while nitrate (NO 3 - )and bicarbonate (CO 3 - ) 2 reduce with depth. All the examined parameters were significant at 0.05. Further, the result of R 2 showed that the relationship explains 68.88% of the variance; while, the stepwise regression suggest chloride to be the most important chemical parameter (R 2 of 38.11%). That is related to well's depth. The paper calls for further research.
关键词：Dispersion; leachates; diffusion; stockpiles; contamination; well depth
