Table 2.3: Relationship between degree of hydrological alteration and total abstraction expressed as % of MALF for various risk classifications (Table 2.2) based on stream size and species composition
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| Risk of deleterious effect | Degree of hydrological alteration |
|||||
|---|---|---|---|---|---|---|
Low risk and high baseflow |
Low risk and low baseflow |
Moderate risk and high baseflow |
Moderate risk and low baseflow |
High risk and high baseflow |
High risk and low baseflow |
|
<20% |
<15% |
<15% |
<10% |
<15% |
<10% |
Low |
20–40% |
15–30% |
15–30% |
10–25% |
15–30% |
10–20% |
Medium |
>40% |
>30% |
>30% |
>25% |
> 30% |
>20% |
High |
