It is the left source river of the Chirchiq in the Syr Darya basin.

Its largest tributaries are the Aksuu, Kokuybel, Avletim, Ters and Nayza (Oqbuloq) from the left, and the Karakysmak, Beshterek, Chandalash and Köksuu from the right.

[1] The average rate of water flow near the mouth is 122 cubic metres per second (4,300 cu ft/s), with a maximum 920 cubic metres per second (32,000 cu ft/s).

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