Table 1. Physical characteristics and hydrological environments at the study stations in the surveyed stations, Korea, 2021

St.	River width (m)	Water width (m)	Water depth (cm)	Bottom strusture (%)*						Water temperature (℃)	Conductivity (μs/cm)	DO (mg/cm)	pH
				B	C	P	G	S	M
1	10～15	3～4	30～50	40	30	20	10			15.4	77	10.3	8.0
2	100～120	20～30	20～50	10	30	30	20	10		17.0	131	9.7	7.3
3	20～30	2～3	10～30	10	20	30	30	10		19.6	137	9.2	7.7
4	30～40	1～3	10～20	10	40	30	20			17.6	121	9.5	7.5
5	50～60	3～7	10～30		10	10	20	60		20.1	257	10.2	7.9
6	80～100	5～10	10～50	30	40	20	10			18.3	200	9.5	7.5
7	120～150	30～50	10～50	10	30	20	20	20		19.5	162	9.2	9.1
8	20～30	2～3	10～20	40	20	30	10			16.2	141	9.9	7.5
9	50～70	3～5	20～50	10	30	30	20	10		17.0	163	9.7	7.5
10	40～60	15～20	10～20	10	40	30	10	10		15.9	137	10.1	7.8

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).