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Title: Human factors and tidal influences on water quality of an urban river in Can Tho, a major city of the Mekong Delta, Vietnam
Authors: Ozaki, Hirokazu
Cô, Thị Kính
Lê, Anh Kha
Phạm, Việt Nữ
Nguyễn, Văn Bé
Tarao, Mitsunori
Nguyễn, Hữu Chiếm
Lê, Việt Dũng
Nguyễn, Hiếu Trung
Sagehashi, Masaki
Lim, Sachi Ninomiya
Gomi, Takashi
Hosomi, Masaaki
Takada, Hideshige
Keywords: Can Tho
Water quality of urbancanal
Household effluent
Dilution effect
Flow direction
Issue Date: 2014
Series/Report no.: Environmental Monitoring and Assessment;186 .- p.845-858
Abstract: In this study, we focused on water quality in an urban canal and the Mekong River in the city of Can Tho, a central municipality of the Mekong Delta region, southern Vietnam. Water temperature, pH, electrical con- ductivity, BOD₅, CODCᵣ, Na⁺ , C1ˉ, NH₄⁺-N, SO₄²ˉ -S, NO₃ˉ-N, and NO₂ˉ-N for both canal and river, and tide level of the urban canal, were monitored once per month from May 2010 to April 2012. The urban canal is subject to severe anthropogenic contamination, owing to poor sewage treatment. In general, water quality in the canal exhibited strong tidal variation, poorer at lower tides and better at higher tides. Some anomalies were observed, with degraded water quality under some high-tide con- ditions. These were associated with flow from the up- stream residential area. Therefore, it was concluded that water quality in the urban canal changed with a balance between dilution effects and extent of contaminant sup- ply, both driven by tidal fluctuations in the Mekong River.
Appears in Collections:Tạp chí quốc tế

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