E2 pH (7) YEAR: 2015 SOURCE: Environmental White Paper 2016, Shiga Prefecture SITE1: Off Imazu (North Lake) Depth [m] Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 0.5 7.5 7.5 7.5 7.6 7.6 7.9 8.6 8.5 8.0 7.8 7.6 7.5 5 7.5 7.5 7.6 7.5 7.6 7.9 8.6 8.5 8.0 7.8 7.6 7.6 10 7.5 7.6 7.6 7.5 7.6 7.9 8.0 8.5 7.9 7.8 7.6 7.7 20 7.5 7.6 7.6 7.5 7.5 7.6 7.6 7.5 7.4 7.7 7.6 7.6 40 7.6 7.6 7.5 7.4 7.5 7.5 7.4 7.4 7.4 7.4 7.3 7.3 80 7.2 7.2 7.5 7.4 7.4 7.4 7.3 7.3 7.2 7.3 7.2 7.1 Btm 7.2 7.1 7.5 7.4 7.3 7.4 7.3 7.3 7.2 7.3 7.1 7.2 SITE2: Off Karasaki (South Lake) Depth [m] Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 0.5 7.7 7.7 7.7 7.6 8.1 8.8 8.4 8.6 7.9 7.9 7.5 7.6 YEAR: 2010 SOURCE: Environmental White Paper 2011, Shiga Prefecture SITE1: Off Imazu (North Lake) Depth [m] Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 0.5 7.6 7.7 7.7 7.8 8.3 8.5 9.0 9.0 8.5 8.1 7.8 7.8 5 7.6 7.6 7.7 7.9 8.3 8.5 9.1 9.0 8.5 8.1 7.9 7.8 10 7.6 7.6 7.7 7.8 8.1 8.5 8.6 8.7 7.7 7.7 7.8 7.7 20 7.6 7.6 7.7 7.8 7.9 7.8 7.6 7.7 7.6 7.5 7.8 7.7 40 7.5 7.6 7.6 7.8 7.7 7.6 7.5 7.5 7.5 7.4 7.4 7.4 80 7.4 7.6 7.7 7.6 7.5 7.4 7.5 7.3 7.4 7.2 7.3 7.2 bottom 7.4 7.6 7.6 7.6 7.5 7.4 7.3 7.3 7.2 7.1 7.2 7.2 SITE2: Off Karasaki (South Lake) Depth [m] Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 0.5 7.9 8.0 8.2 8.2 8.0 8.7 8.9 8.8 8.5 8.2 7.9 8.0 YEAR: 1982 - 1986 SITE1: Station 1 (N. Lake) Depth [m] Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 0.5 7.4 7.4 7.4 7.7 8.2 8.2 8.7 8.9 8.7 8.1 7.7 7.6 5 7.7 7.5 7.4 7.7 8.2 8.3 8.7 9.0 8.7 8.1 7.7 7.6 10 7.4 7.4 7.4 7.7 8.1 8.2 8.3 8.7 8.5 8.1 7.7 7.6 15 7.4 7.5 7.4 7.7 7.8 7.8 7.8 7.6 7.6 7.6 7.7 7.6 20 7.4 7.4 7.4 7.7 7.7 7.5 7.5 7.5 7.4 7.3 7.6 7.5 30 7.4 7.5 7.4 7.6 7.6 7.4 7.4 7.3 7.3 7.2 7.3 7.3 40 7.4 7.5 7.4 7.6 7.5 7.4 7.7 7.3 7.3 7.2 7.1 7.1 60 7.2 7.4 7.7 7.6 7.6 7.4 7.4 7.3 7.3 7.2 7.0 7.0 80 7.0 7.4 7.3 7.6 7.5 7.4 7.4 7.1 7.1 7.1 6.9 6.9 bottom 6.9 7.4 7.7 7.5 7.4 7.3 7.2 7.0 7.0 7.0 6.9 6.9 SITE2: Station 2 (S. Lake) Depth [m] Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 0.5 7.6 7.6 7.5 8 8.7 8.9 8.5 8.8 8.7 8.8 8 7.8 bottom 7.6 7.6 7.5 8.1 8.6 8.8 8.6 8.8 8.7 8.6 8 7.7