RESEARCH IN ABANDONED WELL QUESTIONS THE PRACTICE OR WELL REPRESENTATIVITY CRITERIA USED IN SELECTING FOR GROUNDWATER MONITORING SITES
Journal Title: Biuletyn Państwowego Instytutu Geologicznego - Year 2013, Vol 456, Issue 456
Abstract
The object of research is well No. 5p (UE_ID: PL06G110_004) located in Sokołowsko (the Sudetes, SW Poland). Since completing the well in 1980, it has never been included in water services due to poor water quality, but simply abandoned. The abandonment, lasting already 32 years, has established an unintended long-term experiment in the well. Of the four screened water-bearing horizons, two lower ones run more pressurized sulphate mineral water, which has generated a permanent upward flow within the well and pollution of fresh water in upper ones. The consequences are much wider, as the combination of hydraulic and geochemical settings formed an in-hole natural laboratory in which bio-geochemical processes affect the water quality and the contamination by hydrocarbons enhanced by human activity. The well should ultimately be closed down. Because the well has been included in the national monitoring network for over 20 years, these results also impel to postulate for establishing: 1) a more strong procedure for testing the representativity of observation points in the monitoring network, 2) a revision programme for already existing points, and 3) amendments to the regulations to explicitly solve the case of “orphans” due to the risk they may cause.
Authors and Affiliations
Dariusz DOBRZYŃSKI, Jan MITRĘGA
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