E. LAKE WATER QUALITY (Q) E1 TRANSPARENCY [m] Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec ----------------------------------------------------------------------------------------------------------------- Year 2010* 26.4 26 - 27.5 25.8 - 23.8 19.4 - 19.6 - - 2005* - - - - - - - 14 - 15.9 - - 2000* - - - - - 24 27 17.2 - - - - 1995* - - - - - - - 22.5 - - - - 1990* - - - - - - 21.7 - - - - - 1984-1985 - - - - - 25.4 - 23.3 22.0 23.3 - - ------------------------------------------------------------------------------------------------------------------ * Lake Mashu Long-term Environmental Monitoring, Center for Global Environmental Research, National Institute for Environmental Studies SITE: Station 1 YEAR: 1984-1985 E2 pH Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec ------------------------------------------------------------------------------------------------------------------ Depth [m] 0 - - - - - 7.2 - 7.4 8.0 7.4 - - 30 - - - - - 7.2 - 7.3 7.6 7.2 - - E3 SS [mg l-1] Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec ------------------------------------------------------------------------------------------------------------------ Depth [m] 0 - - - - - <1 - <1 <1 <1 - - 30 - - - - - <1 - <1 <1 <1 - - E4 DO [mg l-1] Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec ------------------------------------------------------------------------------------------------------------------ Depth [m] 0 - - - - - 12.0 - 9.3 9.2 10.1 - - 30 - - - - - 12.2 - 12.8 10.8 12.5 - - E5 COD [mg l-1] Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec ------------------------------------------------------------------------------------------------------------------ Depth [m] 0 - - - - - <0.5 - <0.5 <0.5 0.8 - - 30 - - - - - <0.5 - <0.5 <0.5 0.8 - - E6 CHLOROPHYLL CONCENTRATION [micro l-1] Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec ------------------------------------------------------------------------------------------------------------------ Depth [m] 0 - - - - - 0.26 - 0.35 0.32 0.22 - - E7 NITROGEN CONCENTRATION Total-N [mg l-1] Station 1, 1984-1985 Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec ------------------------------------------------------------------------------------------------------------------ Depth [m] 0 - - - - - <0.05 - <0.05 <0.05 <0.05 - - 30 - - - - - <0.05 - <0.05 <0.05 <0.05 - - E8 PHOSPHORUS CONCENTRATION Total-P [mg l-1] Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec ------------------------------------------------------------------------------------------------------------------ Depth [m] 0 - - - - - <.003 - .003 <.003 <.003 - - 30 - - - - - <.003 - <.003 <.003 <.003 - -