Rules of Engagement: 3

The hierarchical assessment framework for hydromorphology is deliberately open-ended and adaptable so that (i) best use can be made of pre-existing information, and (ii) elements of the approach can be tailored to local circumstances. Therefore, the framework should be treated as ‘guidance’ rather than a ‘fully specified set of tools’. In particular, chapters 5 and 6, which consider the spatial and temporal characterisation of spatial units, and the accompanying thematic annexes, aim to give a range of options that can be considered rather than a shortlist of tools.