Report on Harmonisation of freshwater biological methods
Report on Harmonisation of freshwater biological methods
Report on Harmonisation of freshwater biological methods
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Bulgaria44. In Bulgaria, the Danube and its tributaries have been studied <strong>on</strong> the basis <strong>of</strong>benthic invertebrate data for more than twenty years. The nati<strong>on</strong>al method for<strong>biological</strong> water quality assessment <strong>of</strong> running waters is a biotic index based <strong>on</strong> theIrish Quality Rating System. The Saprobic Index was formerly prescribed in theCOMECON 9 agreement, but today it is <strong>on</strong>ly used in the frame <strong>of</strong> scientific analyses(Peev and Gerassimov, 1999).Cyprus45. In Cyprus the biodiversity <strong>of</strong> the macroinvertebrate fauna is being quantifiedaccording to the Sequential Comparis<strong>on</strong> Index (SCI) methodology and an estimate <strong>of</strong>a Species Deficit Score (SDS), comparing the local number <strong>of</strong> species with thenumber <strong>of</strong> species at a reference or upstream area. Organic polluti<strong>on</strong> is beingevaluated according to the method prescribed by the Biological M<strong>on</strong>itoring WorkingParty (BMWP).Czech Republic46. Sapro<strong>biological</strong> m<strong>on</strong>itoring based <strong>on</strong> investigati<strong>on</strong>s <strong>of</strong> the benthic invertebratefauna is used for the standardised assessment <strong>of</strong> organic polluti<strong>on</strong> in Czech rivers. Thedegree <strong>of</strong> polluti<strong>on</strong> is evaluated according to the technical norm SN 75 7716 (1998)and is applied in a large m<strong>on</strong>itoring network (approx. 1450 sites).47. Since 2002 small watercourses have been m<strong>on</strong>itored by using the PERLApredicti<strong>on</strong> system. Here, the observed fauna is compared with an expected streamtype-specific reference fauna in order to assess <strong>biological</strong> quality.48. Besides the PERLA system, a multimetric approach has been elaborated, which isa Czech modificati<strong>on</strong> <strong>of</strong> the AQEM system (Brabec et al., 2004). In this study organicpolluti<strong>on</strong> and morphological degradati<strong>on</strong> have been assessed <strong>on</strong> three small and midsizedstream types. For WFD implementati<strong>on</strong> the applicati<strong>on</strong> <strong>of</strong> both predictive andmultimetric assessment are under discussi<strong>on</strong>.Denmark9 Council for Mutual Ec<strong>on</strong>omic Assistance77