Water Quality Survey at Monitoring Stations of Enviromental Quality Standard Values for Rivers in Kofu City

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  • 甲府市内の環境基準点の水質測定値に関する考察
  • コウフ シナイ ノ カンキョウ キジュンテン ノ スイシツ ソクテイチ ニ カンスル コウサツ
  • コウフシ ナイ ノ カンキョウ キジュンテン ノ スイシツ ソクテイチ ニ カ

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In a field of water quality management it is essential to get a daily average value of water quality because average values should be compared with goal values set as environmental quality standards. We made whole day surveys, sampling water every two or three hours. The result indicates that sampling at 10 a. m. and 2 p. m. gives lower values than daily average values and sampling at 6 a. m., 12 a. m., 6 p. m., and 12 p. m. gives good values enough to represent daily average values. We find no difference between two average values measured for 15 years at the same monitoring station by two different organizations including our laboratory, finding some difference every year.

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