Electronic Journal of Polish Agricultural Universities (EJPAU) founded by all Polish Agriculture Universities presents original papers and review articles relevant to all aspects of agricultural sciences. It is target for persons working both in science and industry,regulatory agencies or teaching in agricultural sector. Covered by IFIS Publishing (Food Science and Technology Abstracts), ELSEVIER Science - Food Science and Technology Program, CAS USA (Chemical Abstracts), CABI Publishing UK and ALPSP (Association of Learned and Professional Society Publisher - full membership). Presented in the Master List of Thomson ISI.

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Czaban S. , Kajewski I. , Kowalski J. 2004. INFLUENCE OF GROUNDWATER EXPLOITATION ON WATER QUALITY. RETKÓW–STARA RZEKA INTAKE CASE STUDY, EJPAU 7(1), #02.
Available Online: http://www.ejpau.media.pl/volume7/issue1/environment/abs-02.html

ABSTRACT

Extensive exploitation of groundwater from quaternary deposits of fluvioglacial origin, reaching annually over 1.5 mln m³ in Retków–Stara Rzeka water intake, affected both chemical composition and physical properties of water. Detrimental changes in water quality were manifested mainly by an increased alkalinity, hardness, electrolytic conductivity as well as by raised concentration of iron and manganese ions or sulphates. The value of water alkalinity has increased from below 1 meq/dm³ to over 4.5 meq/dm³ in 1986 and 1994, respectively. Conductivity, strongly related to overall mineralisation of water (Total Dissolved Solids – TDS content), over the same period increased on average from about 150 µS/cm to over 550 µS/cm, and in some wells reached nearly 900 µS/cm. Total water hardness increased in the respected period from 60 mg CaCO₃/dm³ to 300 mg CaCO₃/dm³, sporadi

Key words: groundwater intake, groundwater quality..

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