IDENTIFYING TRENDS IN GROUNDWATER QUALITY USING RESIDENCE TIME INDICATORS : AN EXAMPLE FROM THE PERMIAN AQUIFER OF DUMFRIES, SCOTLAND

BALL D. F. / DARLING W. G. / MACDONALD A. M. / et al. - ARTICLE DE PERIODIQUE - 2003

Geological and hydrogeological setting of fractured sandstone and breccias aquifer. Sampling and analysis of Chlorofluorocarbons and sulphur hexafluoride in groundwater and evaluation of residence time. Maps of percentage of modern water and major cations are discussed. Trends in nitrate concentrations are compared with modern water. Conceptual hydrogeological cross section.