Page 187 - Freshwater-Biology-and-Ecology-Handbook
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Identify relevant classification results
Assess the statistical certainty of the
classification and its reliability
Review the evidence base and commission
new investigations where appropriate
STAGE 1 –
STOP – Investigation No Unsure
complete – update Is there a genuine Collect more
Catchment Planning System environmental investigative evidence
problem?
Yes
No
Gather further information or STAGE 2a –
evidence on local pressures Can we identify the
pressures?
Yes
STAGE 2b –
No Is there sufficient
Gather more evidence on evidence to identify
potential causes
the reasons for
failure?
Yes
STAGE 3 –
No Are additional
Continue to implement measures required
existing measures
to address the
problem?
Yes
STAGE 4 – Apply Water Appraisal Guidance
(to identify additional measures, update cost-benefit
analysis and update objectives)
STAGE 5 – Assess affordability
END – Delivery
Apply a programme of measures and undertake
operational monitoring
Figure 4.2
The investigation process for catchment management – from Environment Agency
Freshwater Biology and Ecology Handbook | 187
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