本研究由了解边坡斜面堆积土体与堰塞坝体的几何参数在崩溃过程中随时间变化着手，深入进行系列性的实验与探讨。本研究所得的“连续崩溃流量模式”可适当仿真堰塞坝体受溢流及渗流破坏时的崩溃流量变化。“堰塞坝体破坏实验”结果：三维堰塞坝体的崩溃峰流量来临时间较二维堰塞坝体快，且三维坝体在溢流前会先发生坝体内部补注再溢流；另外，当溢流水所受的阻抗增加时，则会以增加水深、提高位能并减低流速的方式对坝前土砂进行“压力侵蚀”[1]。透过“河岸边坡破坏实验”，进一步得出边坡斜面堆积土体的崩坏过程与其堆积型态、有无堰塞坝体的蓄水效应及堰塞坝形成初始型态间的关系。%The effects of side slope soil body and nature dam's geometric parameter on the collapsing process of landslide dam is experimentally examined in this study. A "continual flow model of dam collapsing" is proposed to simulate the dam collapsing suitably caused by overtopping or pipping. According to experimental results, the peak discharge for 3-D dam collapsing comes earlier than that for 2-D dam collapsing. The talus deposits will transform into stable residual slope after side slope inclined stacking soil body collapsing by "the channel bank collasping".
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