The volume of environmental research has increased in the Geological Survey of Finland (GTK) during the 1990's. The surveys of groundwater areas have played a remarkable role in them, because of the municipal needs for groundwater. The growing risk of pollution, environmental accidents etc. requires information about the flow and storage capacity of groundwater. Geophysical methods have tumed out to be a useful tool in giving regional information of bedrock topography and the thickness of overburden. In these studies GTK has worked as a consult and contractor for cities, municipalities and regional environment centers.


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