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Application of the River Habitat Survey method to assessment and classification of hydromorphological state of rivers and streams in south Poland, in accordance with requirements of the water framework directive

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Bielak S. R. , Kulig N. , Ścieńska E.

In accordance with legacy of the Water Framework Directive membership countries of the EU are obliged to reach at least good ecological state of running waters until 2015. One of the three basic components of assessing ecological state is the determination of hydromorphological conditions occurring in river channels and valleys. In this paper an effort has been taken to check usefulness for such evaluations River Habitat Survey (RHS) – British research method, which is used in Poland for classification of ecological quality of surface waters from the view-point of their actual hydromorphological state. Research was conducted in four upland and lowland rivers and streams of south Poland while each watercourse belonged to another abiotic type. The research released both advantages and disadvantages of the RHS method whereas results of this evaluation pointed at need of developing this method by adding to it, not regarded as yet, the characteristic of hydrological regime