Uy (Irtish). Uy — Rossiyaning Novosibirsk va Omsk viloyatlaridagi daryo. Uy — Irtishning oʻng irmogʻi hisoblanadi. Uning uzunligi va u 6,920 kilometr havzani quritadi. Uning havzasidagi iqlim asosan qorli, apreldan iyungacha suv toshqini kuzatiladi. Irmoqlari. Krapivka (26 km), Qargachi (35 km), Boborovka (55 km), Shchelkanovka (58 km), Medvedevka (71 km), Yermakovka (80 km), Unarka ( 104 km), Intsiss (123 km), Urmanka (134 km), Bolgun (144 km), Uchug (149 km), Tereul (197 km), Kainsass (207 km), Stanovaya (217 km) ), Mali Kainsass (230 km), Kainsass (236 km), Keizess (243 km), Shaitanka (256 km), Kalantsass (271 km), Tunguzka (287 km), Iksashka (299 km), Kuitra (309 km), Taitas (324 km), Salym (356 km), Razvily (360 km). Bu uning irmoqlari hisoblanadi.