一、前言辽宁东部山区的特点是由北向南逐渐山多坡陡,土壤瘠薄,岩石裸露,跳石较多;地壳处于上升过程中,外力作用强烈,岩石破坏迅速。由于山地较高,气温低、温差大,不仅降雨量多而且集中,地表迳流强度大,集水迅速,一旦森林遭到破坏,遇降暴雨,巨大洪流冲击山坡的砾石岩块,随山洪奔腾而下,极易于发生滑坡和山啸。然而这些年来,在林业生产上却没有完全按上述 I. INTRODUCTION The mountainous region in the east of Liaoning is characterized by steep mountainous slopes from north to south, with infertile soil and exposed rocks and more jumping stones. The crust is in the process of ascension, the external force is strong and the rock is destroyed rapidly. Due to the high mountain, low temperature and large temperature difference, not only the rainfall is more and more concentrated, the intensity of surface flow is high and the water catchment is rapid. Once the forest is damaged and heavy rains and heavy torrent impact the hillside gravel blocks, The next, very prone to landslides and tsunami. However, in the past few years, forestry has not fully complied with the above