About OKAMOTO TAKAHIRO
About 滋賀県琵琶湖環境科学研究セ
About 水環境学会誌
About water quality standard
About bottom layer
About dissolved oxygen
About transparency
About fluctuation and variation
About lake
About lake pollution
About water quality test
About water quality management
About environmental monitoring
About long term fluctuation
About Lake Biwa
About water quality monitoring
About Lake pollution
About 水質環境基準
About 琵琶湖
About 底層
About DO
About 沿岸
About 透明度
About 長期変動
About 傾向
About 評価