Luniachek, V.E., Sinna, O.I., Borysenko, K.B. and Popov, V.S. 2019. Optimization of the method of hydrological and geomorphological research as an instrument in the formation of a modern geographer`s special competences. Problems of Continuous Geographic Education and Cartography. 29 (Jul. 2019), 6-16. DOI:https://doi.org/10.26565/2075-1893-2019-29-01.