Deliverable 6.2

Abstract: Development of impact matrix at catchment scale

In this Deliverable a simple two-dimension impact matrix which records the major environmental impacts on freshwaters is presented for each catchment together with the intensity of the impact. The list of impacts is restricted to the effects caused to the hydromorphology, physical and chemical properties of water bodies by each major anthropogenic pressure. The intensity of impacts is defined as severe if the identified impact alone can cause the water body’s status to be classified as poor or bad, moderate if the water body’s status is classified as moderate and minor if the water body’s status is classified as good or high. Section 2 presents impact matrices completed by each partner for all six case study catchments and for each one of the major anthropogenic activities identified in each catchment. Section 3 summarizes findings by constructing short, simple tables that identify major drivers and impacts specific for each catchment. Results obtained by the impact matrices for each case study are compared. The most severe impacts are felt within the classes ‘hydromorphological characteristics’ and ‘physical-chemical’. The Morsa and Orlik catchments have the highest number of ‘severe’ impacts followed by Louros and Thames, while the catchments of Dee and Pyhajarvi/Ylaneenjoki have the highest number of ‘minor’ impacts.

This is an internal deliverable, targeted mainly at those working on the cost effectiveness analysis in WP6 and the modelling in WP5.

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