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Table 1 Mean values of physicochemical factor values in Buk (BC) and Hangae (HG) streams of Gangwon-do, Korea, from May to November 2011

From: A study of low-temperature and mountain epilithic diatom community in mountain stream at the Han River system, Korea

Parameter Buk stream (mean ± SD) Hangae stream (mean ± SD)
Upper
(BC01–06)
Middle
(BC07–09)
Lower
(BC10–13)
Altitude (m) 579.2 ± 160.6 351.2 ± 60.0 185.9 ± 41.2 503.8 ± 219.9
Velocity (cm s−1) 65.8 ± 19.5 35.0 ± 16.1 13.7 ± 12.8 54.6 ± 4.8
Dissolved oxygen (mg L−1) 9.3 ± 2.1 9.1 ± 0.1 10.1 ± 0.3 8.8 ± 0.4
pH 6.5 ± 0.4 7.8 ± 0.7 8.0 ± 0.1 7.4 ± 0.2
Conductivity (μS cm−1) 25.9 ± 4.2 61 ± 12.8 60.9 ± 6.3 64.1 ± 19.4
Turbidity (NTU) 0.8 ± 1.0 1.2 ± 1.2 12.0 ± 4.1 0.6 ± 0.6
Chlorophyll a (μg L−1) 0.2 ± 0.1 1.2 ± 0.4 13.3 ± 5.6 0.6 ± 0.2
BOD5 (mg L−1) 0.6 ± 0.1 1.6 ± 1.0 2.0 ± 0.8 0.5 ± 0.0
Total nitrogen (mg L−1) 1.386 ± 0.140 1.283 ± 0.138 1.891 ± 0.152 1.323 ± 0.302
Total phosphorus (μg L−1) 17.7 ± 8.3 22.1 ± 3.4 49.5 ± 6.7 17.1 ± 1.1