关键词: 麦兹巴赫冰川湖, 遥感, 面积变化, 天山

Abstract: The glacial outburst flood of Lake Merzbacher is the serious disaster source of the Aksu River. In this study, utilizing the remote sensing data of Landsat, HJ-1A/B and GF-1 from 1998 through 2017, the lake’s area was abstracted with the method of Munsell HSV Transform. By analyzing and comparing the maximum lake area of different years, it was found that the area of Lake Merzbacher has shrank from 3. 75 km2 to 2.87 km2 in recent 20 years. Lake Merzbacher contains two small lakes, Upper lake and Lower lake. Lower lake which dominates the storage of the whole lake has shrank from 3.3 km² to 1.88 km² during 1998—2017. On the contrary, Upper lake has expanded. As a consequence, the total water capacity has reduced. The relationship between the area of Lake Merzbacher and temperature was examined, and it is found that positive accumulated temperature affected by the lake’s outburst date has strong positive correlation with the area of Lower lake, which means that temperature can make a difference to the lake’s area through impacting meltwater to the lake and the stability of the dam.

Key words: Lake Merzbacher, remote sensing, area change, Tianshan Mountains