Forecasting water discharges on the mountain river Arpa (Armenia) Ekaterina Gaidukova, Varduhi Margarian, Vagif Mirzoev, Anna Batmazova and Igor Vinokurov E3S Web Conf., 623 (2025) 01011 Published online: 08 April 2025 DOI: 10.1051/e3sconf/202562301011