Several large drainages from short-lived lakes occurred in the Teskey Range in 2006-2014. The large drainages are caused due to closure and opening of ice-tunnel which developed inside of debris landforms at glacier front. To understand a drainage system of the short-lived lake, we investigated the timing of appearance of the short-lived lakes in the northern part of the Teskey Range using satellite images in 2013-2018. We identified 160 short-lived lakes,out of which 42 lakes appeared in spring (May-June) and 118 lakes appeared in summer (July-September)
during 2013-2018. All short-lived lakes appear on the debris landforms including buried ice when ice tunnel closes due to freezing of stored water inside of ice tunnel during winter (freezing type) or the blockages of collapse of the debris-mixed ice (collapsing type). The short-lived lakes appeared in spring might be freezing-collapsing type, the lakes appeared during melting season of summer might be collapsing type. Among of
the 160 short-lived lakes, 30 lakes (6 in spring and 24 in summer) had been repeated138 over six years. Some of them changed their type (freezing-collapsing) during six years. In the field survey, the changes of water level at the Kormudu glacial lake during 2016- 2017 showed the lake was collapsing type, which appeared in mid-July. The daily discharge of the glacial lake was quite small.