Risk study of landslide geohazards in Lanzhou City

Abstract：Lanzhou is one of the frequent geological disaster regions among provincial capital cities in China, and its geohazard is mainly affected by such factors as geology, topography and human activities. Based on an analysis of controlling factors and main factors of landslide development in Lanzhou, and on the platform of GIS system, the authors used Binary Logistic of SPSS to calculate the probability of geological hazards in the unit of the evaluation region. Through the exchange between GIS software platform and SPSS data format and the utilization of the spatial analysis function of GIS software, the landslide hazards susceptibility was divided into different zones in Lanzhou. The results are consistent with the distribution of landslides and thus can play an important role in preventing the geological disasters in Lanzhou.