摘要
县城的快速发展日益受到地质灾害的显著制约,进行地质灾害危险性评价是县城可持续发展的客观需要。以甘肃省榆中县为例,建立了地质灾害危险性评价的3级模糊数学模型和全面详细的评价指标体系,查明了存在的主要地质灾害类型有滑坡、崩塌、泥石流及不稳定斜坡等,进行了地质灾害危险性3级模糊综合评价。结果表明,按照不易发、低易发、中易发和高易发4个级别,榆中县为地质灾害高易发区,该结果与实际情况较为一致。说明多级模糊综合法是实现地质灾害危险性评价由单因子定性评判过渡为多因子定量综合评判的有效途径。
Geological hazard evaluation is an objective need for sustainable development of small towns. The essay took Yuzhong County in Gansu Province as an example to introduce establishment of three-grade fuzzy mathematical model for evaluation of geological hazard, and a comprehensive and detailed system of evaluation index. By means of this geological model, the author made an assessment of to the identified geological disasters including landslides, avalanches, landslides and unstable slopes in study area. The results show that Yuzhong County fall into the high-prone areas of geological disasters if the possibilities of assessed hazards are classified into four classes： non-prone, low-prone, prone and high-prone, it is consistent with the actual situation.
出处
《甘肃地质》
2013年第1期75-80,共6页
Gansu Geology
