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Ogólna ocena stanu wód podziemnych na terenie Gdańska i Sopotu : podsumowanie

Lidzbarski M., Karwik A., Kordalski Z., Kowalewski T., Pasierowska B., Sokołowski K., Szelewicka A., Tarnawska E.

Przegląd Geologiczny

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2016

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Vol. 64, nr 6

427--435

EN

This paper synthetically describes results of research conducted in Gdańsk in 2009–2014. The chemical composition of groundwater varies between aquifers. Intermoraine, Miocene and Oligocene aquifers conduct freshwater with a mineralisation of below 600 mg/dm³. These waters preserve natural chemical composition and are characterized by first- and second-class quality. The groundwater of the Cretaceous formation are low-mineralised and represent mainly the HCO₃-Na type and, to a smaller extent, to the HCO₃-Ca type. High concentrations of fluoride ion are also a specific feature of these waters, reaching even 2 mg/dm in some places. The groundwater composition of the Pleistocene-Holocene aquifer is often altered due to the impact of anthropogenic factors. The performed study has enabled identification of zones of past groundwater pollution. The work was focused on determining the type, extent, concentration and the rate of transport of contaminants. Two zones of polluted water have been identified with different specific substances. Based on the study, activities aimed at reducing the risks and improving an appropriate water management have been undertaken, particularly with regard to the endangered groundwater intakes.

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Jakość wód podziemnych w strefie dopływu wód do ujęcia „Czarny Dwór” i „Zaspa Wodna” w Gdańsku

Karwik A., Lidzbarski M., Kordalski Z., Szelewicka A.

Przegląd Geologiczny

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2016

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Vol. 64, nr 6

408--417

EN

The research was aimed at identifying groundwater contaminants in the inflow area of the Gdańsk intakes of “Czarny Dwór” and “Zaspa Wodna”, and determining their origin. The hydrochemical study covered an area of over 12 km2; it also included the vertical variation in the chemistry of the aquifer. The study shows that the most common parameters decreasing the water quality are typical municipal sewage components, communication pollutants and, locally at several locations, compounds derived probably from some industrial plants or service facilities.In most of the area, the poor groundwater quality in the upper part of the aquifer, caused by anthropogenic influence, does not affect the quality of water in the central and lower parts of the aquifer. However, the water is mixed near the intakes, because of the induced groundwater inflow from the entire vertical section to the active wells. Migration of VOC compounds, which are heavier than water and gradually sink toward the aquifer's bottom, occurs in a different way. Based on a hydrochemical model, a prognosis of the time and direction of contaminants migration has been made.

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Ocena jakości wód podziemnych na terenie Gdańska i Sopotu na podstawie badań prowadzonych w latach 2011–2012

Karwik A., Kowalewski T., Sokołowski K., Kordalski Z.

Biuletyn Państwowego Instytutu Geologicznego

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2013

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nr 456 Hydrogeologia z. 14/1

267--274

PL

Ocenę jakości wód podziemnych Gdańska i Sopotu wykonano na podstawie szeroko zakrojonych badań, zarówno pod względem liczebności, jak i zakresu oznaczeń. Przeanalizowano wpływ terenów zurbanizowanych i poprzemysłowych, znajdujących się w strefach dopływu wód do części ujęć oraz obecny stopień oddziaływania słonych wód morskich na warstwy wodonośne. Przy pomocy analizy hydrodynamiki wyznaczono kierunki przepływu wód podziemnych, ze szczególnym wskazaniem kierunków migracji wód zanieczyszczonych.

EN

Groundwater quality assessment for Gdansk and Sopot was based on extensive research, both in number and scope. The stress of urban and post-industrial land, located on the part of water intakes, were considered as well as the influence of salty sea water on aquifer. The analysis of hydrodynamics revealed groundwater flow direction, that let determine the contaminated groundwater flow destination.