Arctic hydrologist. 
Born in the city of Togul, Tomsk Province, in the family of an agronomist. Chernyavsky's childhood passed in the lap of nature, already in his youthful years he became a passionate hunter, fisherman, and tracker. 
In 1930, Cherniavsky graduated with honors from a high school in Vladivostok and the following year entered the Leningrad State University at the hydrological department of the Faculty of Geography. As a third-year student, he got into practice in the Arctic sailing on the Yermak icebreaker and became interested in the North. 
After graduating from Leningrad State University, Chernyavsky as an employee of the  GUSMP and the Arctic Research Institute before the war managed to take part in several Arctic voyages. 
In 1936, for participation in hydrological work on the icebreaker "G. Sedov” he was awarded the Order “Badge of Honor”. In 1938, Cherniavsky again as part of a research expedition on the "Sedov". During the drift, he was included in the staff of lecturers who gave lectures to students of the Hydrographic Institute, who underwent marine practice and were forced to stay for the winter. Together with B.A. Morzhov he conducted a course of hydrology. 
Judging by the published scientific works, Chernyavsky was a talented researcher, who had a great future. The scope of his scientific interests included primarily tidal processes. He studied in graduate school, but did not have time to finish it because of the outbreak of war. In the days of the siege of Leningrad, Chernyavsky, like many other members of the Arctic Research Institute, volunteered for the front and fought in a partisan unit. Few of these volunteers returned home. Partizan Fedor Kryukov wrote a letter to Chernyavsky's wife, Tamara Pavlovna: “... You lost a loved one, and we, including myself, are the best comrade, a wonderful combat comrade. I was his constant companion. He has three enemy trains. Dozens of destroyed Nazis".

A plaque on the building of the Arctic Research Institute