River segments

Sample 1 (S1)

Sample 2 (S2)

S1 ∩S2

Sorensen Index

Level of similarity

RHU × RUW

20

26

16

0.70

Moderate

RHU × RFP

20

26

14

0.48

Low

RHU × PUU

20

26

15

0.65

Moderate

RHU × USP

20

29

17

0.69

Moderate

RHU × PUD

20

27

14

0.60

Moderate

RUW × RFP

26

26

22

0.85

High

RUW × PUU

26

26

21

0.81

High

RUW × USP

26

29

20

0.73

Moderate

RUW × PUD

26

27

19

0.72

Moderate

RFP × PUU

26

26

23

0.89

High

RFP × USP

26

29

22

0.80

High

RFP × PUD

26

27

19

0.73

Moderate

PUU × USP

26

29

20

0.73

Moderate

PUU × USP

26

29

20

0.76

Moderate

USP × PUD

29

27

22

0.79

Moderate