Landslides are usually caused by geological processes such as rainstorms or earthquakes and may have a massive impact on human production and life. The hazard chain of landslide-river blockage-outburst flood is the most common hazard chain caused by landslides. A database based on existing landslide cases was established in this paper to investigate the assessment formulas of river blocking risk, dam stability, and peak flood discharge after the dam break. A risk assessment model of the landslide-river blocking-breaching hazard chain was established with the vulnerability downstream. The case of the Baige landslide verifies the applicability of the model. This model can be used in a landslide-prone area to predict whether it will form a relatively massive river blockage after the landslide occurs, whether the landslide dam formed by river blockage will breach in a short time, as well as the impact of the outburst flood on the downstream area.
Landslides are usually caused by rainstorms and geological processes such as earthquakes and may have a massive impact on human production and life. The hazard chain of landslide–river blockage–outburst flood is the most common hazard chain caused by landslides. A database based on existing landslide cases was established in this study to investigate the assessment formulas of the risk of river blockage, dam stability, and peak flood discharge after a dam has broken. A risk assessment model of the landslide–river blockage–breaching hazard chain was established, including the downstream vulnerability. The case of the Baige landslide verified the applicability of the model. This model can be used in a landslide-prone area to predict whether a relatively massive river blockage will form after the landslide occurs, whether the landslide dam formed by the river blockage will breach in a short time, and the impact of the outburst flood on the downstream area.
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