Seasonal Changes and Land Use Conditions of Water Quality of Shallow Well Water Southern Thailand

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Vichit Rangpan, Abdulloh Hayeeyapha

Résumé

Water sampling from each of 16 selected wells was periodically performed 7 times from February to August 2010. Observing data were compared with that of drinking water standard and analyzed by using statistical software including means, standard deviation, t-test, and f-test distribution. It was found, that means highest temperatures during dry and rainy seasons were 27.75OC and 28.00OC respectively. The highest water pH was 7.42 and 7.41. The conductivity of water was 153.56 µS/cm in the dry season and 131.15 µS/cm in the rainy season. Water turbidity was highest at 14.26 NTU, and 14.65 NTU respectively. Its chloride content was highest at 3.12 mg/L in the dry season and 3.17 mg/L in the rainy season, whereas its hardness in dry and rainy seasons was 5.43 mg/L, and 5.90 mg/L respectively. Coliform count in dry and rainy seasons was 1533.75 MPN/100ml, and 1142.50 MPN/100ml, whereas fecal coliform was 895.93 MPN/100ml, and 1303.33 MPN/100 mL. The biological properties of water in these shallow wells were, therefore, higher than the standard. 

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