TY - JOUR N2 - The purpose of the study presented in the article is to implement modern hydrographic characteristics of freshwater of the Shatsk Lakes (28 lakes in Volyn Polissya, Ukraine) by typing water bodies according to the requirements of the EU Water Framework Directive, assessment of the chemical composition of lake water and bottom sediments (sapropel), determination of the opportunity for their recreational use in the special status of the district as a national park. Despite the presence of the two large lakes (Svityaz – 26.2 km 2 and Pulemetske – 15.5 km 2), very small lakes with a water surface area of less than 0.5 km 2 (64%) are dominating in the Shatsk group. Mineralisation of calcium-hydrocarbonate lake waters is 115–303 mg∙dm –3 and calcium-sulphate aqueous extract of sapropel is – 318–1451 mg∙dm –3. Using a Piper diagram, it was found that there is genetic homogeneity between surface and groundwater, indicating a significant share of groundwater in the water supply of lakes. There are eight species of sapropel deposits in 19 lakes of the district. A wide range of chemical composition and physical and mechanical properties of sapropel deposits of the Shatsk Lakes allow us to consider them as an important resource for agriculture and industry. We found that sapropel from Shatsk Lakes meets the requirements for therapeutic mud and can be used for therapeutic and health purposes. L1 - http://journals.pan.pl/Content/124460/PDF-MASTER/2022-01-JWLD-23.pdf L2 - http://journals.pan.pl/Content/124460 PY - 2022 IS - No 54 EP - 193 DO - 10.24425/jwld.2022.141571 KW - bottom sediments KW - lake KW - sapropel KW - Shatsk Lakes A1 - Khilchevskyi, Valentyn A1 - Ilyin, Leonid A1 - Pasichnyk, Mykhailo A1 - Zabokrytska, Myroslava A1 - Ilyina, Olga PB - Polish Academy of Sciences; Institute of Technology and Life Sciences - National Research Institute DA - 2022.09.28 T1 - Hydrography, hydrochemistry and composition of sapropel of Shatsk Lakes SP - 184 UR - http://journals.pan.pl/dlibra/publication/edition/124460 T2 - Journal of Water and Land Development ER -