Kolsai Lakes The river originates in Kolsay Kungei Alatau and falls by one in three lakes: Top, Mynzholki and Bottom. Fresh water in the lakes is tough, with sodium sulfate. The bottom is shallow place, without rocky ledges. In the summer the water temperature is +10°C. The triad of alpine lakes like pearls strung with thread adorns the northern Tien Shan.