EREQ |
See Table 26
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|
Temporal dimension of EREQ |
See Table 26
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|
Spatial unit (SU), type and size (if relevant) |
Ponds with surface area of 10 m2 to 2 ha |
Implicitly averaging over whole surface area of pond is considered acceptable |
Statistical population of SUs |
All ponds in‐field or edge‐of‐field of treated agricultural fields in area of use of substance |
|
Multiyear temporal statistical population of EREQ values for one spatial unit |
Series of tens of years of annual maxima of time‐weighted average concentration in pond water in years of treatment |
Consider only concentration durations and periods that are relevant, i.e. for AMA (21 days) and LAGDA (NF 8–10 up to 10 weeks after NF 62, i.e. approximately 4 months) in their relevant periods (spring/early summer) |
Desired spatio‐temporal percentile of the statistical population of EREQ values |
Overall 90th percentile of the statistical population of each EREQ |
Percentile can easily be changed if needed |