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- W2399212839 abstract "Variations of water quality parameters with seasonal changes in the Phong watershed were explored. Water quality parameters including turbidity, suspended solids (SS), total dissolved solids (TDS), nitrate, phosphate, alkalinity, conductivity and total coliform were directly measured on site or analyzed at a laboratory twice a year in January (dry season) and in July ( wet season) for two years (2004 and 2005). The results revealed a significant influence of seasonal changes on the Phong water quality. It was significantly evident for the concentrations of turbidity, SS, NO:- and POe'- between wet and dry seasons. In addition, the water turbidity had strong positive correlations with SS and Phosphate (POot ), especially during the wet season in both the upstream and downstream of the Phong watershed where human activities have a high influence on land use patterns. While the middle Phong watershed, a location of the Ubolratana Dam, turbidity had very weak correlation with SS (0.14) in the dry season. However, it had very strong correlation with SS (1.00) in the wet season indicating that the dam plays an important role of settling down SS. Moreover, the significant positive correlations of turbidity, SS and POa3- especially in the wet season clearly indicated the phenomena of naturally occurred soil erosion with exacerbation by human induced soil erosion. This results in transformation of the forest land to the agricultural land which has been occupied in the Phong watershed. Therefore, these water quality parameters (turbidity, SS and PO4'-) should be focused on for monitoring human impacts on water quality in the Phong watershed." @default.
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- W2399212839 date "2007-01-01" @default.
- W2399212839 modified "2023-09-26" @default.
- W2399212839 title "Assessment of Seasonal Variations of Surface Water Quality in the Phong Watershed, Thailand" @default.
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