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The Ükök catchment is drained by Ükök rive a right tributary of the Chüy river. The Ükök is mainly fed by glacier melt water from May to August, but also by snow melt water and rainwater. Hence, the lowest mean monthly discharge is from October to March with a minimum in January. From April to August the mean monthly discharge is getting gradually higher, reaching a maximum in the period of glacier melt in August.

Due to the fact that the period with the highest discharge is the period with maximum evaporation, the river regime is suitable for irrigation farming.