The mass transfer mechanisms in landslides are complex to monitor because of their suddenness and spatial coverage. The active clayey Harmalière landslide, located 30 km south of Grenoble in the French Alps, exhibits two types of behavior: in its upper part, decameter-sized clay blocks slide along a listric slip surface, while a flow-like mechanism is observed in a clayey remolded material a few hundred meters below the headscarp. The landslide underwent a major retrogression affecting 45 ha in March 1981 and has experienced multiple reactivations since then. The last major event took place on the 26^th of June 2016, and a large investigation survey was conducted to better understand the reactivation mechanism. A multi-method investigation was carried out at different temporal and spatial scales, including aerial photograph and light detection and ranging processing, correlation of optical satellite images, global navigation satellite system monitoring, continuous seismic monitoring, and passive seismic survey. The morphological evolution of the landslide was traced over the last 70 years, showing a headscarp retrogression of 700 m during multiple reactivations and a total mass transfer of more than 6 × 10⁶ m³. The detailed study of the 2016 event allowed to track and understand the mechanism of a mass transfer of 1 × 10⁶ m³ in 5 weeks, from a sliding mechanism at the headscarp to an earthflow at the toe.

滑坡的传质机制由于其突然性和空间覆盖性而难以监测。活跃的黏土Harmalière滑坡位于法国阿尔卑斯山格勒诺布尔以南30公里处，表现出两种类型的行为：在其上​​部，数十米大小的黏土块沿着李斯特滑动面滑动，而在滑坡中观察到类似流动的机理。黏土在头皮以下几百米处重塑了材料。滑坡在1981年3月经历了一次大的倒退，影响了45公顷，自那以后经历了多次复活。上一次重大赛事发生在26^日于2016年6月进行了一次大规模调查，以更好地了解重新激活机制。在不同的时空尺度上进行了多方法调查，包括航拍和光检测与测距处理，光学卫星图像的关联，全球导航卫星系统监控，连续地震监测以及被动地震勘测。在过去的70年中追踪了滑坡的形态演变，表明多次活化过程中头皮倒退700 m，总传质超过6×10 ⁶ m ³。通过对2016年事件的详细研究，可以跟踪和了解1×10 ⁶ m ³的传质机理 在5周内，从头皮的滑动机制到脚趾的泥流。