黃名村(2003)發展出一套數值模式Debris-2D,來模擬具有降伏應力的土石流,模式中需先輸入土石流的體積量及其他相關參數如密度、降伏應力等,才能進行模擬。由於土石流體積量的估計會因為不同的估算方法而產生很大的差異,故本研究將針對土石流體積量對於土石流流速模及流深模擬結果的影響進行分析,嘗試瞭解在地形和其他參數相同的條件下,不同的土石流體積量會對流速及流深的模擬結果產生多大的差異性。研究結果顯示,80%的體積量差異可能導致模擬出的流速與流深分別有71.22%及46.6%的差異,200%的體積量差異可能導致模擬出的流速與流深分別有127.43%及121.68%的差異,且低估體積量會比高估體積量對流速及流深的影響來得大。
Huang (2003) developed a numerical model Debris-2D to simulate debris flow with yield stress. In this model, the volume of the debris flow and other material parameters, such as density and yield stress must be inputted before simulation. Because a significant disparity exists in estimated debris-flow volume via different estimation methods, this study focuses on the analysis of the influence of debris-flow volume on the simulated velocity and depth of debris flow. 80% difference of volume may leads to 71.22% and 46.6% difference in the simulated velocity and depth, respectively. While 200% difference of volume may leads to 127.43% and 121.68% difference in the simulated velocity and depth, respectively. Underestimation of debris-flow volume will have much influence on the simulated velocity and depth than overestimation.