Publication: The Chao Phraya river basin: Water quality and anthropogenic influences
Issued Date
2019-08-01
Resource Type
ISSN
16070798
16069749
16069749
Other identifier(s)
2-s2.0-85067431701
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Mahidol University
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SCOPUS
Bibliographic Citation
Water Science and Technology: Water Supply. Vol.19, No.5 (2019), 1287-1294
Suggested Citation
Nuanchan Singkran, Pitchaya Anantawong, Naree Intharawichian, Karika Kunta The Chao Phraya river basin: Water quality and anthropogenic influences. Water Science and Technology: Water Supply. Vol.19, No.5 (2019), 1287-1294. doi:10.2166/ws.2018.167 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/50908
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Title
The Chao Phraya river basin: Water quality and anthropogenic influences
Abstract
© IWA Publishing 2019. Land use influences and trends in water quality parameters were determined for the Chao Phraya River, Thailand. Dissolved oxygen (DO), biochemical oxygen demand (BOD), and nitrate-nitrogen (NO3-N) showed significant trends (R2 0.5) across the year, while total phosphorus (TP) and faecal coliform bacteria (FCB) showed significant trends only in the wet season. DO increased, but BOD, NO3-N, and TP decreased, from the lower section (river kilometres (rkm) 7–58 from the river mouth) through the middle section (rkm 58–143) to the upper section (rkm 143–379) of the river. Lead and mercury showed weak/no trends (R2 < 0.5). Based on the river section, major land use groups were a combination of urban and built-up areas (43%) and aquaculture (21%) in the lower river basin, paddy fields (56%) and urban and built-up areas (21%) in the middle river basin, and paddy fields (44%) and other agricultural areas (34%) in the upper river basin. Most water quality and land use attributes had significantly positive or negative correlations (at P 0.05) among each other. The river was in crisis because of high FCB concentrations. Serious measures are suggested to manage FCB and relevant human activities in the river basin.