天山独(山子)库(车)公路北段泥石流研究

STUDY ON THE DEBRIS FLOW AT THE NORTHERN SECTION OF DUSHANZI-KUQA HIGHWAY THROUGH TIANSHAN MOUNTAINS

通过对天山独库公路北段泥石流的考察和半定位观测，研究了该地段泥石流的分布特征、危害方式和危害程度以及泥石流的形成条件、类型、发有趋势等，并为泥石流治理提出应采取的措施和原则．

Within 172 km long of the northern section of Dushanzi - Kuqa Higway through the Tianshan Mountains, there are 48 debris flows in total. of which 30 debris flows belong to the valley type, and 18 the slope-surface type. From the point of view of genesis, they can be divided into 39 rainstorm debris flows and 9 glacial ones. The formation of debris flow is affected by several factors including geological, geomorphological, hydrological, meteorological and glaciation conditions. Debris flqws occur here in successive years since 1980s.They destroy the highway and bridges and block up traffic frequently. The developing history of the debris flows there can be traced back to 13 500±530 a. B. P. by 14C dating of its deposited materials. They are now still active, and maybe go on hereafter. The principle for preventing the debris flows is the engineering measures combining the damming with draining.