Confined groundwater is an indispensable resource for the urban security of Shanghai, China, where multi-layer aquifer structures and human activities create a complex environment. An understanding hydrochemical characteristics evolutionary mechanisms necessary its protection effective utilization will be explored in this study. A total 87 samples were collected from five confined aquifers. Hyd...


 The purpose of this study is to analyse the hydrochemical regime and surface water quality upper reaches Tisza River from its source Tiachiv, which also includes transboundary section river. data Borys Sreznevskyi Central Geophysical Observatory State Emergency Service Ukraine for period 1984-2018, as well results route surveys during 2015-2018 served materials study. hydrological parame...

Major ions and selected environmental tracers (D, 18O, 3H and chlorofluorocarbons (CFCs)) were employed to determine the source, flow rates, and hydrochemical evolution of groundwater in an alluvial fan along the front of the Qilian Mountains, which serves as an important groundwater reservoir in northwest China. Temporal and spatial variations in ion concentrations were limited near the upper ...