About OKAMURA TAKASHI
About 滋賀県水産試験場研究報告
About lake
About Shiga prefecture
About lake water
About Water Quality
About water quality test
About time course
About transparency
About surface water
About shallow groundwater
About hydrologic survey
About water temperature
About air temperature
About dissolved oxygen
About nitrate nitrogen
About phosphorus
About Plankton
About biota
About species specificity
About Phytoplankton
About dominant species
About species composition
About bottom water
About Lake Biwa
About surface water
About long term fluctuation
About Lake pollution
About Fishing grounds and fishing conditions
About 琵琶湖
About 水質
About 水
About 象
About 長期変動