Measures Against the Predicted Degradations of Water Quality of Makio Dam Reservoir by the Volcanic Eruption of Mt. Ontake

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  • 御嶽山噴火に伴う牧尾ダム貯水池の水質対応
  • ミタケサン フンカ ニ トモナウ ボクビ ダム チョスイチ ノ スイシツ タイオウ

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<p>Mt. Ontake erupted on September 27, 2014 and it was the second time in recorded history. The distribution and volume of products by the volcanic eruption were almost similar to those of the previous in 1979. Therefore, the influence of the eruption on the water quality of Makio Dam reservoir, where Mt. Ontake is located in its catchment, was estimated to continue over a long period. In response to this situation, Japan Water Agency (JWA) has collaborated with local governments concerned and water users to implement not only efficient water quality monitoring but also appropriate measures for water quality conservation while making accurate forecast of discharged turbidity. As a result, the dam has kept supplying water to the downstream continuously without any particular trouble in water use.</p>

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