Complex sentence: The main river flowing into its basin is the Upper Taymyra, which flows into the lake from the west; other rivers flowing into it are the Zapadnaya, Severnaya, Bikada Nguoma, Yamutarida and Kalamissamo.
Split into simpler sentences: The main river flowing into its basin, from the west, is the Upper Taymyra. Other rivers flowing into it are the Zapadnaya, Severnaya, Bikada Nguoma, Yamutarida and Kalamissamo.