TY JOUR TI Prospects for the use of water resources of the Niger river within the Republic of Guinea KW water resources KW Niger River KW Guinea KW West Africa KW precipitation KW river runof JO Melioration and Water Management AU Silla, A.. AU Matveeva, T.I. AU Vladimirov, S.O. AU Perminov, A.V. PY 2026 IS 2025 PB ANO Editorial Board Melioration and water management