Hydraulic resistances of derivation channels of hydropower facilities Bakhtiyor Uralov, Sanatjon Khidirov, Farokhiddin Uljaev, Ikboloy Raimova, Khumoyun Kholmatov and Alisher Allanazarov E3S Web Conf., 274 (2021) 03010 Published online: 18 June 2021 DOI: 10.1051/e3sconf/202127403010