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Details of Hydrochemical Variations in Flowing Wells
Author(s) -
Marsh J. Marcus,
Lloyd John W.
Publication year - 1980
Publication title -
groundwater
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.84
H-Index - 94
eISSN - 1745-6584
pISSN - 0017-467X
DOI - 10.1111/j.1745-6584.1980.tb03411.x
Subject(s) - aquifer , artesian aquifer , flushing , hydrogeology , water well , casing , groundwater , geology , saturation (graph theory) , hydrology (agriculture) , soil science , petroleum engineering , geotechnical engineering , medicine , mathematics , combinatorics , endocrinology
Due to chemical reactions between steel casing and stored water in capped artesian wells, the pH, Eh, TDS, major and trace ion concentrations and saturation indices can be significantly, but relatedly altered from their aquifer values. To obtain true aquifer water samples, either all the stored water must be flushed from the well or a sampling tube must be used to ensure that the water is taken from within the aquifer. Flushing time can be calculated from well dimensions and best be monitored in the field by measuring temperature and electrical conductivity. This study has been made of confined wells in a fissured limestone, but the reactions which occur are likely to be common to aquifers of different hydrogeology.