E1 TRANSPARENCY [m](Q)
SITE: Average of 7 sites
YEAR: 2012
SOURCE: Shimane Prefectural Government Water Quality Measurement Report
E2 pH
Month Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar
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Depth [m]
0.5 8.6 8.7 8.4 8.4 8.7 9.4 9.4 8.1 8.9 7.8 7.9 8.4
* 8.5 8.4 8.1 8.3 8.4 8.9 8.9 8.1 8.8 7.8 7.9 8.3
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* 1 meter above the bottom
E3 SS [mg l-1]
Month Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar
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Depth [m]
0.5 9.9 8.1 6.7 7.3 6.8 11.9 7.1 5.1 9.6 3.7 4.4 6.8
* 13.6 8.4 7.0 6.8 6.0 7.9 3.9 b 4.5 9.4 5.1 4.6 7.6
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* 1 meter above the bottom
E5 COD [mg l-1]
Month Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar
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Depth [m]
0.5 5.1 5.8 5.5 5.9 5.5 8.8 7.1 5.4 6.9 3.6 4.2 5.2
* 5.6 5.3 5.4 5.5 5.3 6.8 6.0 5.2 6.7 4.0 4.2 5.6
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* 1 meter above the bottom
E7 NITROGEN CONCENTRATION
Total-N [mg l-1]
Month Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar
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Depth [m]
0.5 0.548 0.479 0.391 0.411 0.401 1.048 0.802 0.873 0.530 0.634 0.668 0.675
* 0.553 0.446 0.411 0.396 0.463 0.843 0.876 0.860 0.544 0.673 0.656 0.716
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* 1 meter above the bottom
E8 PHOSPHORUS CONCENTRATION (Q)
Total-P [mg l-1]
Month Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar
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Depth [m]
0.5 0.061 0.092 0.076 0.090 0.187 0.280 0.315 0.293 0.117 0.043 0.046 0.047
* 0.076 0.087 0.077 0.090 0.215 0.320 0.353 0.280 0.118 0.053 0.047 0.053
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* 1 meter above the bottom
SITE : Station 1
YEAR : 1985
SOURCE: Data Book of World Lake Environments
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
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1.5 1.0 0.7 1.5 1.4 0.7 1.4 2.0 0.9 1.1 1.4 1.0
E2 pH (Q)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
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Depth [m]
0.5 7.4 7.6 8.7 8.0 8.0 7.6 8.8 8.5 8.5 8.3 7.6 7.4
5.5 7.6 7.6 8.7 8.1 7.5 7.2 8.5 7.4 8.3 7.9 7.5 7.5
E3 SS [mg l-1](Q)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
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Depth [m]
0.5 7 6 10 4 4 10 6 4 7 5 4 6
5.5 6 8 8 5 6 5 7 3 6 6 9 6
E4 DO [mg l-1](Q)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
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Depth [m]
0.5 13 14 14 8.6 8.7 8.8 9.7 7.4 10.9 9.2 10 -
5.5 13 14 13 8.7 7.6 <0.5 7.2 - 9.2 8.9 10 -
E5 COD [mg l-1](Q)
Determined by KMnO4 method.
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
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Depth [m]
0.5 5.0 3.6 4.3 3.6 3.7 4.3 4.1 4.9 5.1 4.4 2.9 3.2
5.5 3.9 4.0 4.0 3.6 3.5 3.7 4.3 4.5 4.3 4.1 3.0 3.2
E6 CHLOROPHYLL CONCENTRATION [micro l-1](Q)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
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Depth [m]
0.5 29 9.6 41 11 9.8 18 20 20 12 40 13 21
5.5 21 9.8 49 13 8.3 10 10 30 4.8 30 9.3 21
E7 NITROGEN CONCENTRATION (Q)
Total-N [mg l-1]
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
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Depth [m]
0.5 0.56 0.70 0.51 0.26 0.40 0.57 0.48 0.58 0.53 0.46 0.40 0.33
5.5 0.52 0.68 0.70 0.29 0.44 0.62 0.40 0.72 0.34 0.50 0.42 0.30
E8 PHOSPHORUS CONCENTRATION (Q)
Total-P [mg l-1]
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
--------------------------------------------------------------------------------------------------------------
Depth [m]
0.5 .056 .042 .053 .021 .027 .054 .029 .051 .046 .037 .038 .024
5.5 .048 .051 .046 .025 .037 .099 .055 .012 .044 .038 .042 .026
E9 CHLORIDE CONCENTRATION [ ](Q)
Chlorinity
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
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Depth [m]
0.5 4.0 3.5 1.8 1.2 1.3 1.0 0.66 1.1 1.5 1.4 2.0 2.1
5.5 4.4 9.4 2.2 1.2 2.3 4.1 0.76 5.2 1.7 1.4 2.0 2.1
