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Abstract
Water Quality Monitoring of Bang Yai Canal in Phuket Province
Saithan Thongphrom1* and Chirawan Lenthas2
Water qualities of Bang Yai canal in Phuket province were studied. The physical, chemical and biological properties were determined in 14 parameters; temperature, color, pH, conductivity, salinity, turbidity, TDS, SS, DO, BOD, NO3--N, NH3-N, Pb and Total Coliform Bacteria. Water samples of four stations; Kathu waterfall, Rong Lao bridge, Bangkok hospital and Gojan bridge from upstream to downstream 20 km along the canal were collected by grab sampling method. Four collections of the water samples in two frequency periods of the dry season (March, 2010) and the rainy season (June-July, 2010) were investigated. It was found that the water quality in the dry season decline more than the rainy season. Water quality in each station was compared. Result shown that only Kathu waterfall station (upstream) had the best water quality, in contrast to the others stations had very degraded water quality when it flow through community and enterprise moreover wastewater was untreated before draining into Bang Yai canal.