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

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