岷江上游崩塌滑坡分布规律研究

STUDY ON THE RKEGULARITIES GOVERNING THE DENSITY DISTRIBTION OF COLLAPSES AND LANDSLIDED ON THE UPPER MING JIANG RIVER BASIN

岷江为长江—级支流，上游长３３０ｋｍ，自１９８６年以来，发生崩塌滑坡２００余处，体积约２．１亿ｍ￣３。作者研究了岷江上游崩塌滑坡的分布规律。采用统计指标法，将岷江上游分为三种不同的崩塌滑坡分布密度区：①ＵＸＳ．高密度区；②ＭＸＳ，中密度区；③ＬＸＳ＿３低密度区。

The Ming Jiang River is a first-grade tributary of the Yangtze River.The upperreaches of Ming Jiang River is 330 km in length.Since 1986,over 200 collapses and land-slides have occurred,and the total volume reached about 2.1×10￣8m￣3.In this paper,thewriter studies the regularities governing the density of collapse and landslide on the upperMing Jiang River Basin. Three different type areas of density distribution were noticed,onthe basis of statistical index method First UXS_1,high degree density area;Second MXS_2 middle degree density area;Third LXS_3 low degree density area.