Features of the Maximum Water Flows of the Arpa River Under Modern Conditions Varduhi Margaryan, Levon Azizyan, Amalya Misakyan, Ekaterina Gaidukova, Gennady Tsibul’skii and Ksenia Raevich E3S Web Conf., 333 (2021) 02006 Published online: 21 December 2021 DOI: 10.1051/e3sconf/202133302006