Assessment of physical properties and pH of selected surface waters in the northern part of Western Siberia

One of the undisputed natural resources of Western Siberia is a countless number of surface waters. They can be found in the form of all sorts of lakes from the smallest thermokarst ones with a surface area of only 1 m² to large post-glacial lakes or high-mountain lakes. Besides, the world’s largest wetland is the peat bogs in the Western Siberia. Other equally impressive forms of surface waters are streams and rivers with the Ob River at the head making it the seventh largest river in the world. All these water bodies pose a tremendous challenge for research into their ecology.