Lakes and Watercourses

TABLE 48.
(Contd.)
Proportion of salmonids (flow = < 0.2 - 0.7 m/s – Flowing)
Class Description 0 – 99 m ab. 100 – 299 m ab. 300 – 700 m ab. > 700 m ab.
1 No or insign. deviat. ≥ 0.76 ≥ 0.62 ≥ 0.90 ≥ 0.99
2 Slight deviation 0.58 – 0.76 0.34 – 0.62 0.68 – 0.90 0.90 – 0.99
3 Significant deviation 0.38 – 0.58 0.15 – 0.34 0.40 – 0.68 0.88 – 0.90
4 Large deviation 0.17 – 0.38 0.05 – 0.15 0.14 – 0.40 0.54 – 0.88
5 Very large deviation < 0.17 < 0.05 < 0.14 < 0.54
Proportion of salmonids (flow = < 0.7 m/s – Fast-flowing)
Class Description 0 – 99 m ab. 100 – 299 m ab. 300 – 700 m ab. > 700 m ab.
1 No or insign. deviat. ≥ 0.78 ≥ 0.43 ≥ 0.95 ≥ 0.98
2 Slight deviation 0.60 – 0.78 0.25 – 0.43 0.80 – 0.95 0.90 – 0.98
3 Significant deviation 0.37 – 0.60 0.11 – 0.25 0.45 – 0.80 0.50 – 0.90
4 Large deviation 0.19 – 0.37 0.05 – 0.11 0.16 – 0.45 0.25 – 0.50
5 Very large deviation < 0.19 < 0.05 < 0.16 < 0.25
Salmonid reproduction 3
Class Description
1 No or insignificant deviation 1.00
2 Slight deviation 0.67 – 1.00
3 Significant deviation 0.50 – 0.67
4 Large deviation 0.33 – 0.50
5 Very large deviation < 0.33
Presence of species and stages sensitive to acidification 4
Class Description
1 No or insignificant deviation a)
2 Slight deviation b)
3 Significant deviation c)
4 Large deviation d)
5 Very large deviation e)
Contd. ➤
79