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The Changes of Water Quality in Space and Time in the Mekong river, bassac river and Adjacent Waterways

Journal of Life Sciences 2014年第6期8卷 481-488页

作者： Luu Duc Dien Ma Tu Lan Nguyen Dinh Hung Research Institute for Aquaculture No. 2 116 Nguyen Dinh Chieu Street District 1 Hochiminh City 70000 Vietnam

Catfish （Pangasianodon hypophthalmus） farming along Mekong river and bassac river depends heavily on water quality of the two rivers, whereas water quality of these rivers are affected by the waste of aquaculture activities, agricultural production, industrial and municipal waste. This report analyzes the monitoring data on Mekong river, bassac river and adjacent waterways in the period of 2011-2012, focusing on parameters of organic pollution to assess the current quality of these two rivers. Based on the results, the water quality in the river-head was generally better than in the middle and at the end of the river, and the quality of water of the Mekong river was better than bassac river. In terms of time, water quality in July was considered the best in all the basins. At adjacent natural rivers and canals, ammonia levels increased and exceeded the Vietnamese standard in April, and BOD values were also much higher compared to two major rivers. The results of the model also showed that the levels of pollution index of the Mekong and bassac river were very low （1.33 and 1.47）, and the values （Y） in the canals were higher （1.63-1.67） but still in permitted level. Therefore, the water quality of the Mekong and bassac river in the period 2011-2012 was generally still quite good.

关键词： bassac river catfish Mekong river model water quality.

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