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The Interreg IVB North Sea Region Programme

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Zonation of the TIDE estuaries


by Lindsay Geerts, Kirsten Wolfstein, Sander Jacobs, Stefan van Damme & Wouter Vandenbruwaene

3d. 2d. Zonation per estuary - Humber

The zonation of the Humber differs from that of the other three estuaries. A nested approach was not applied. However, besides the shown zonation (fig. 6), zonation schemes have been developed to meet new management needs, or schemes have been suggested e.g. under HARBASINS. It should be noted that Natural England do not very often divide the estuary up, considering instead, that it should be treated as a single system. However, when they do, they use the Environment Agency CHaMP zonations e.g. for saltmarsh conservation objectives and condition assessment the estuary is split into inner, middle and outer based on the fact that the saltmarshes are different in these sections of the estuary. The zones used are inner to the bridge, middle to Grimsby/ Hawkins Point and then the Outer estuary.

Nevertheless for the TIDE focus, a zonation scheme is adopted, as a starting point for an objective interestuarine comparison. This was based upon calculations for salinity (see further, table 10). A map (fig. 7) and table (table 6) give an overview of this new zonation approach.

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Important to know

Reports / Measures / Tools

Tool: Zonation of the TIDE estuaries (Recommendation)

Management issues

What is important in establishing a zonation for estuaries?


SalinityVenice-systemZonation approach