THE GEOCHEMICAL DIVERSITY OF LACUSTRINE SEDIMENTS OF THE SUCHEDNIÓW WATER RESERVOIR (ŚWIĘTOKRZYSKIE VOIVODESHIP, POLAND) - PRELIMINARY RESULTS

The research area is located in central Poland, in the Świętokrzyskie Voivodeship (Kielce-Sandomierz Upland). Once heavily industrialized as the former Old Polish Industrial District area, there were many forges and iron furnances developed here. For this purpose, on many rivers of this area the industrial ponds were built. They functioned mainly until the collapse of the metallurgical industry and the water mills as well. Built in 1974 on the Kamionka River in Suchedniów, the water reservoir was use for retention and recreational purposes. Since its construction, the reservoir has never been thoroughly dredged. In 2017, large-scale hydrotechnical works on the reservoir began, aimed at its deepening. Draining the Suchedniów water reservoir made it possible to carry out detailed sedimentological and morphological analyzes of its bottom. A large differentiation of the sedimentary environment types in the reservoir basin has been recognized. The collected samples also provided material for geochemical analyzes. The analysis was made for the content of such trace elements as Pb, Cd, Cr, Co, Cu, Mn, Ni, Zn, Sr, As, Al and Fe. The known industrial history of this area and the use of the modern reservoir, allows to attempt explain the content changes in the lacustrine sediments.