基于FLO-2D模型的红椿沟泥石流工程治理效果研究

Research on Engineering Control Effect on Hongchun Gully Debris Based on FLO-2D Model

汶川地震带来了众多地质灾害,给当地灾民造成了严重的生命和财产损失。为了更好地预防地质灾害的发生,保护灾后重建成果,对地质灾害防护工程的效果分析研究就显得尤为重要。文章选取了汶川红椿沟流域中的甘溪铺沟、大水沟、新店子沟3条泥石流沟为研究对象,采用二维流变模型FLO-2D,经连续方程与运动方程,结合网络化的数字高程模型,通过DEM在ArcGIS中转换为ASCII格式输入至FLO-2D软件中,建立流域模型,分析计算出红椿沟泥石流沟在工程治理条件下,遭遇50、100年一遇暴雨时,泥石流冲出物的堆积深度和流动速度。通过计算机数值模拟方法对治理效果进行分析研究,从而确定工程治理效果和进一步的工作方法。

Since the Wenchuan Earthquake there has been seven years, and the safety of people and property has been affected by this large geological disaster deeply. In order to prevention the geological disasters and protect the rebuilding after the disasters. Study on effect of geological disaster prevention engineering is crucial. This paper select Ganxipu ditch, Dashui ditch, and Xindianzi ditch from Hongchun Bully as research zones, using the two-dimensional rheological model FLO-2D, continuity equation and motion equation, combined with digital elevation model of network, to set up watershed model, analyze and calculate the debris flow accumulation depth and flow velocity under the condition of engineering governance. Regulation effect on debris was also analyzed by computer numerical methods.