河西走廊地质灾害成因分析与防治对策

Analysis on Causes of Geological Disasters in Hexi Corridor and the Countermeasures

河西走廊是一个地质灾害多发区,其主要灾害有滑坡、泥石流、土地沙漠化、水土流失和土地盐渍化等。本文利用河西走廊酒泉、张掖和武威三地区的降水、暴洪灾害和地质灾害等资料,分析了该区主要地质灾害的成因和特点,结果表明,强降水是引发滑坡、塌陷和泥石流等地质灾害发生的主要原因,自然因素和人为因素共同构成了这些灾害的发生。分析了它们的主要出现地,圈定了落区,为今后准确预报地质灾害提供了科学依据。还提出了减少地质灾害发生的有效措施。

Hexi corridor is prone to geological disasters. The main hazards in this area are landslide, debris flow, desertification, soil erosion and land salinification. By use of data of precipitation, rainstorm, flood and geological disaster in three regions such as Jiuquan, Zhangye and Wuwei in Hexi corridor, the causes and features of major geological disasters in these regions are analyzed. The results indicate that intense precipitation is the main cause of geological disasters such as landslide, collapse and debris flow. The natural and human factors jointly trigger the disasters. The main areas prone to geological hazards are analyzed and outlined which will provide scientific basis for future correct geological hazard forecast. Finally, effective measures for reducing geological hazard are put forward.