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 |