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Hydromorphological quality elements

For high status to be achieved, the Directive requires that there are no more than very minor human alterations to the hydromorphological quality elements. At good, moderate, poor and bad status, the required values for the hydromorphological quality elements must be such as to support the required biological quality element values for the relevant class. Each of the four surface water categories is ascribed specific hydromorphological quality elements (Table 3.1).