Table 1. Physical characteristics and hydrological environments at the study stations in the surveyed stations, Korea, 2019

Stations	River width (m)	Water width (m)	Water depth (m)	Bottom strusture (%)*						Water temperature (°C)	Conductivity (μs/cm)	DO (mg/cm)	pH
				B	C	P	G	S	M
1	60~70	40~50	1~2					70	30	25.6	1,353	8.2	7.1
2	7~10	0.5~1	0.05~0.1		10	20	30	40		19.3	389	10.2	7.7
3	5~7	1~1.5	0.05~0.1		10		20	60	10	19.0	334	10.5	7.4
4	50~70	20~30	0.1~0.3	10	10	30	20	30		25.2	564	8.2	7.3
5	3~4	0.5~1	0.05~0.1				10	70	20	25.4	312	8.4	7.1
6	7~8	0.3~0.5	0.05~0.1	40	30			30		23.4	261	8.7	7.0
7	15~20	2~2.5	0.05~0.1	40				50	10	30.1	330	9.9	7.2
8	60~80	30~40	0.3~1.5			10	10	70	10	28.3	495	7.8	7.0

B: Boulder (>256mm), C: Cobble (64~256mm), P: Pebble (16~64mm), G: Gravel (2~16mm), S: Sand (0.1~2mm), M: Mud (<0.1mm) - modified Cummins (1962).