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Deterioration of the quality of groundwater under urban areas has become a major environmental concern worldwide. This paper presents a pilot case study (in the Taipei urban area) using multiple stable isotopes (δDH2O and δ18OH2O, δ15NNO3 and δ18ONO3, δ34SSO4 and δ18OSO4, and 87 Sr/ 86 Sr) with the aim of understanding the subsurface nature and environmental status of such areas. A...
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