天山奎屯河源高寒地带自然灾害特征

Some Characteristics of Natural Disasters in Alpine Region of the Kuitunhe River Source in the Tianshan Mountains

在天山独库公路穿过的奎屯河源海拔1800～3400m的河谷中,分布着一系列自然灾害现象,如冰川泥石流、融雪泥石流、雪崩、岩崩和路基融冻沉陷等,它们具有显明的地带性特征。阐述了它们的形成条件,并提出了相应的防治建议。

The field and laboratory studies show that along the length of 532 km of the Duku Highway across the Tianshan Mountains from north to south, disasters mainly distribute in the valleys between 1 800 and 3 400 m a.s.l. at the source of the Kuitunhe River in the north part of the highway. The disasters often occur in Summer and Autumn. All the disasters, such as snow melt debris flow, snow avalanches, solifluction of highway foundation and frozen weathering and so on. have close relationship with alpine landform, climate, rock type and water sources. The various suggestions for disasters prevention are put forward according their causes and types.