The width of the shallow part, m

Rocks of the shallow part

Number of days (water temperature of 18˚C - 22˚C)

Flow rate, m/s

Area occupied by aquatic plants, per 100 m%

Criteria

Points

Criteria

Points

Criteria

Points

Criteria

Points

Criteria

Points

5 - 10

4

Sandy

4

Over 80

4

0

4

0

4

10 - 20

3

Pebbly

3

60 - 80

3

0 - 1

3

0 - 10

3

20 - 40

2

Rocky

2

50 - 60

2

1 - 2

2

10 - 50

2

40 - 100

1

Muddy

1

30 - 50

1

2 - 3

1

50 - 80

1

Over 100

0

Clay

0

Under 30

0

Over 3

0

Over 80

0