2008年汶川地震前的中国大陆地震滑坡研究

Overview of Earthquake-triggered Landslides Across China Mainland Before the 2008 Wenchuan M_w7.9 Earthquake

总结了2008年汶川地震前的中国大陆地区地震滑坡研究情况,可主要分为地震滑坡特征与分布规律、评价与预测2个方面。对地震滑坡的特征与分布规律,介绍了总体特征研究结果,叙述了中国西南地区、西北地区等的地震滑坡研究,特别是一些重要震例。对地震滑坡评价与预测,按照专家知识驱动与地震滑坡真实数据驱动,将已有研究成果归纳为2类。从地震震级与滑坡的定量对比关系、单次地震事件的滑坡分布数据和地震滑坡评价模型3个方面分析研究中存在的问题。认为有必要对一些2008年汶川地震之前的地震事件开展补充性滑坡研究。

This paper reviews the studies of earthquake-triggered landslides across the China mainland before the 2008 Wenchuan Mw7.9 earthquake. It focuses on two aspects： one concerns the characteristics and the spatial distribution of landslides, and the other the hazard assessment and the spatial prediction of these hazards. In the first aspect, there are several studies related to earthquake- triggered landslides in China mainland, with many results on earthquake-triggered landslides in Southwest China and Northwest China, including case studies of several large seismic events. Some related studies for other regions of China mainland are also discussed. In the second aspect, the studies may be divided into two categories of expert knowledge-based methods and data-driven methods. Shortcomings and limitations of these studies are analyzed, with comparisons of earthquake magnitudes and co-seismic landslides, preparation of landslide inventory maps based on individual earthquake events, and earthquake-triggered landslides evaluation modelling. It is suggested to carry out remedial studies about landslides triggered by major earthquake events before the 2008 Wenchuan earthquake. They can provide insight for landslide-hazard mitigations in the future and are of great significance for development of earthquake-triggered landslide research.