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Risk analysis in the process of setting the protection zone for the “Osowa” and “Dolina Radości” groundwater intakes in Gdańsk

The article presents the method of risk assessment for the purpose of establishing a protection zone for underground water intakes in Gdańsk. It was made based on additions to hydrogeological documentations. It was necessary to carry out field works, laboratory tests and model tests. On this basis, the main factors threatening the groundwater intakes were selected. The risk analysis was developed using risk assessment matrices, taking into account the dependence of the likelihood of a threat on its effects.