New data on morphology of small lakes of the Zaonezhskiy Peninsula (Lake Onego, Karelia)

The article examines morphological features of unstudied small lakes located in the south-east of Karelia within the historic-geographical region of Zaonezhye (the Zaonezhsky Peninsula, Lake Onego). Morphology is one of the most significant features that can characterize the nature of lakes. It largely determines the functioning of lake ecosystems, influencing various lacustrine processes (hydrophysical, hydrochemical, sedimentation, etc.). Morphological features of lakes are expressed through morphometric characteristics and indicators calculated on their basis. During field studies, we conducted geomorphological and bathymetric surveys of 10 small lakes. The morphometric characteristics were determined using satellite images and topographic maps. The horizontal and vertical dissection indicators were calculated in accordance with accepted methods. It has been shown that the studied lakes are distinguished by a diversity of morphometric characteristics. This diversity explained by differences in the features of morpholithogenesis of the lakes. Four morphogenetic types of small lakes were identified of the basis on the data from previous and contemporary studies. Lake types morphometric characteristics are presented in the article.