Human factors and tidal influences on water quality of an urban river in Can Tho, a major city of the Mekong Delta, Vietnam
| Autor: | Viet Nu Pham, Sachi Ninomiya-Lim, Mitsunori Tarao, Takashi Gomi, Anh Kha Le, Huu Chiem Nguyen, Viet Dung Le, Masaaki Hosomi, Van Be Nguyen, Thi Kinh Co, Hirokazu Ozaki, Hieu Trung Nguyen, Masaki Sagehashi, Hideshige Takada |
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| Rok vydání: | 2013 |
| Předmět: |
Hydrology
geography geography.geographical_feature_category General Medicine Management Monitoring Policy and Law Pollution Tide level Residential area Anthropogenic pollution Rivers Vietnam Water temperature Water Supply Mekong river Environmental science Humans Sewage treatment Water Pollutants sense organs Water quality Cities Mekong delta General Environmental Science Environmental Monitoring |
| Zdroj: | Environmental monitoring and assessment. 186(2) |
| ISSN: | 1573-2959 |
| Popis: | 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 conductivity, BOD5, CODCr, Na+, Cl−, NH4 +−N, SO4 2−−S, NO3 −−N, and NO2 −−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 conditions. These were associated with flow from the upstream residential area. Therefore, it was concluded that water quality in the urban canal changed with a balance between dilution effects and extent of contaminant supply, both driven by tidal fluctuations in the Mekong River. |
| Databáze: | OpenAIRE |
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