Landslides frequently occur on mountain slopes due to earthquakes and rainfall. When a landslide occurs near a river, the landslide mass moves at a certain speed towards the river channel and eventually stops at the channel either due to frictional resistance or by being blocked by the upslope on the opposite bank of the river. If the width of the river channel at the landslide site (B_W) is narrow and the volume of the landslide (V_L) is sufficient, the landslide may block the river channel, resulting in landslide dams. Landslide dam is a significant hazard in mountainous area, when dam failure will cause severe destruction and affect downstream area. The frequency, scale, and disaster of landslide dam will be more serious than before based on global climate change. To reduce disasters caused by landslide dams, rapid assessments of dam stability and dam-break discharge must be conducted in the early stages of the formation of landslide dams. One of the essential parameters for these assessments is the minimum height of the landslide dam (\( {H}_{D_{\mathrm{min}}} \)). However, landslides may occur in remote, inaccessible mountainous areas where the geometrical parameters of landslide dams may not be immediately obtained, making it difficult to perform emergency risk assessments of barrier lakes. The magnitude of \( {H}_{D_{\mathrm{min}}} \) changes due to the effects of the run-out distance of the landslide (L_{run ‐ out}) and B_W, but a quantitative relationship has not been reported in the literature. Hence, this study investigated the effects of V_L, the slope angle (θ_S), the maximum height of the landslide (H_L), B_W, and other parameters on \( {H}_{D_{\mathrm{min}}} \) through laboratory experiments. The relationship between L_{run ‐ out}, B_W, and \( {H}_{D_{\mathrm{min}}} \) was determined, and a dimensionless method for evaluating \( {H}_{D_{\mathrm{min}}} \) was established. This method can be applied to predict the minimum height of landslide dams when the position of the landslide is known. Additionally, when landslide dams form but \( {H}_{D_{\mathrm{min}}} \) is not known due to difficulties in on-site study, this method can quickly assess the height of the dam and provide an assessment of the risks related to the landslide dam. This greatly reduces the uncertainties associated with the prevention and emergency management of landslide dams, and can assist government authorities to set up the disaster early warning plans of landslide dam under future climate change condition.

由于地震和降雨，山体滑坡经常发生。当河流附近发生滑坡时，滑坡体会以一定的速度向河道移动，并由于摩擦阻力或被河对岸的上坡所阻挡而最终在河道处停止。如果滑坡部位的河道宽度（B _W）窄而滑坡的体积（V _L）足够，滑坡可能会阻塞河​​道，从而导致滑坡坝。滑坡水坝在山区是一个重大灾害，当水坝溃坝会造成严重破坏并影响下游地区。基于全球气候变化，滑坡坝的频率，规模和灾难将比以前更加严重。为了减少由滑坡水坝造成的灾害，必须在滑坡水坝形成的早期对水坝的稳定性和溃坝流量进行快速评估。这些评估的基本参数之一是滑坡坝的最小高度（\（{H} _ {D _ {\ mathrm {min}}} \））。但是，滑坡可能发生在偏远，人迹罕至的山区，在这些山区可能无法立即获得滑坡大坝的几何参数，这使得难以进行屏障湖泊的紧急风险评估。的大小\（{H} _ {d _ {\ mathrm {分钟}}} \）的变化，由于滑坡的跳动距离（的效果大号_运行-出）和乙_{w ^}，但定量关系具有没有文献报道。因此，该研究调查的影响V_大号，倾斜角（θ_小号），滑坡（的最大高度ħ_大号），乙_{w ^}，以及其他参数\（{H} _ {D _ {\ mathrm {min}}} \）通过实验室实验。确定了L _run-out，B _W和\（{H} _ {D _ {\ mathrm {min}}} \\）之间的关系，并采用了无因次方法来评估\（{H} _ {D _ {\ mathrm {min}}} \）成立。当已知滑坡的位置时，该方法可用于预测滑坡坝的最小高度。此外，当滑坡坝形成但\（{H} _ {D _ {\ mathrm {min}}} \）由于现场研究的困难而无法得知，这种方法可以快速评估大坝的高度，并提供与滑坡大坝有关的风险的评估。这大大减少了与滑坡大坝的预防和应急管理有关的不确定性，并可以帮助政府当局制定未来气候变化条件下的滑坡大坝灾害预警计划。