Behavior of nutrition and phytoplankton in reservoirs

Musty odor occurred in tap water with Oita River as its source in October 2014. Oita city disclosed that the problem was due to plankton in the Serikawa Dam, which is on a tributary of the Oita River. This study was aimed at elucidating the cause of the problem by comparing water quality in 2014 with that in previous years. 2-Methylisoborneol (2-MIB) showed a high concentration in the Serikawa Dam and downstream in 2014. It was found that thermal stratifi cation was absent from November 2014 to January 2015 because no temperature difference between the upper and lower layers was detected. On the other hand, the ammonia nitrogen concentration remained high, 2.3 mg•L-, from November 2014 to January 2015. Iron and manganese ions showed the same pattern as ammonia nitrogen in 2014. This suggests that, in 2014, 2-MIB negligibly decomposed as a result of oxygen depletion caused by the high ammonia nitrogen concentration in the Serikawa Dam Reservoir. It is likely that 2-MIB reached farther downstream without being decomposed.

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An experimental study on the relationship between retention time and algae increase in reservoirs

Kudo¹,

Kawakami²,

Yamada³

2004

JOURNAL OF JAPAN SOCIETY OF HYDROLOGY & WATER RESOURCES

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Behavior of nutrition and phytoplankton in reservoirs

Cited by 4 publications

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Experimental Study on the Water Purification System by Using the Wind Energy (1st Report, Improvement of the System Performance in a Low Wind Velocity Region)

Experimental Study on the Water Purification System by Using the Wind Energy (1st Report, Improvement of the System Performance in a Low Wind Velocity Region)

Impact of Serikawa Dam on Water Quality Downstream: Significance of High 2-MIB Concentration in 2014

An experimental study on the relationship between retention time and algae increase in reservoirs

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