Two Multi-Temporal Datasets To Track The Enhanced Landsliding After The 2008 Wenchuan Earthquake

We release two datasets that track the enhanced landsliding induced by the 2008 M_w 7.9 Wenchuan earthquake over a portion of the Longmen mountains, at the eastern margin of the Tibetan plateau (Sichuan, China). The first dataset is a geo-referenced multi-temporal polygon-based inventory of pre- and coseismic landslides, post-seismic remobilisations of coseismic landslide debris, and post-seismic landslides (new failures). It covers 471 km² in the earthquake’s epicentral area, from 2005 to 2018. The second dataset records the debris flows that occurred from 2008 to 2017 in a larger area (~17,000 km²), together with information on their triggering rainfall as recorded by a network of rain gauges. For some well-monitored events, we provide more detailed data on rainfall, discharge, flow depth and density. The datasets can be used to analyse, at various scales, the patterns of landsliding caused by the earthquake. They can be compared to inventories relative to past or new earthquakes or other triggers to reveal common or distinctive controlling factors. To our knowledge, no other inventories that track the temporal evolution of earthquake-induced mass wasting have been made freely available thus far. Our datasets can be accessed from https://doi.org/10.5281/zenodo.1405490. We also encourage other researchers to share their datasets to facilitate research on post-seismic geological hazards.本研究发布两套数据集，用于追踪青藏高原东缘（中国四川）龙门山脉部分区域内，2008年矩震级（M_w）7.9级汶川地震诱发的强化滑坡活动。第一套数据集为经地理配准（geo-referenced）的多时序多边形滑坡编目表，涵盖震前滑坡、同震滑坡、同震滑坡碎屑的震后再活化，以及震后新生滑坡（新失稳体），覆盖震中区域471平方千米范围，时间跨度为2005至2018年。第二套数据集记录了2008至2017年间约17000平方千米更大范围内发生的泥石流事件，以及由雨量计网络监测得到的触发降雨数据；针对部分监测完备的事件，本研究还提供了降雨、流量、流深及流体密度等更详细的参数数据。该两套数据集可用于多尺度分析汶川地震诱发滑坡的活动特征，通过将本数据集与过往或新近地震、其他触发因素对应的滑坡编目进行对比，可揭示滑坡活动的共性与差异性控制因素。据本研究团队所知，截至目前尚无公开可获取的、追踪地震诱发块体运动（mass wasting）时序演化过程的滑坡编目数据集。本数据集可通过https://doi.org/10.5281/zenodo.1405490获取。本研究同时呼吁其他研究者共享其数据集，以推动震后地质灾害相关研究的发展。