CAJ | 학술논문

采用2维流变模型FLO-2D,经连续方程与运动方程,结合网格化的数字高程模型,选取陇南市武都地区清水沟、嘴子沟及段河坝3条泥石流沟为试验区.通过DEM在ArcGIS中转换为ASCⅡ格式输入至FLO-2DPRO软件中,建立流域模型,分析计算出各网格点的可能运动速度、淤积深度,并将模拟结果整合致GIS中.在GIS软件中分析可能淤积范围,通过对比2010年陇南“8.12”特大暴雨事件引发泥石流灾害灾情,验证了FLO-2D模型模拟试验区泥石流威胁范围的正确性,发现模拟结果与实际发生灾情威胁范围大致相符.
채용2유류변모형FLO-2D,경련속방정여운동방정,결합망격화적수자고정모형,선취롱남시무도지구청수구、취자구급단하패3조니석류구위시험구.통과DEM재ArcGIS중전환위ASCⅡ격식수입지FLO-2DPRO연건중,건립류역모형,분석계산출각망격점적가능운동속도、어적심도,병장모의결과정합치GIS중.재GIS연건중분석가능어적범위,통과대비2010년롱남“8.12”특대폭우사건인발니석류재해재정,험증료FLO-2D모형모의시험구니석류위협범위적정학성,발현모의결과여실제발생재정위협범위대치상부.
According to the continuity equation and motion equation, combined with the grid digital elevation model (DEM), FLO-2d, a two-dimensional rheological model, was used to calculate the simulation results. The Qingshui Gully, Zuizi Gully and Duanheba Gully in Wudu were used as the study areas. The DEM was converted to ASCⅡ in ArcGIS, then it was input to the FLO-2DPRO software to establish a river basin model in order to analyze the possible movement velocity and deposition depth in each grid. The simulation results were integrated and input into the ArcGIS to analyze the possible deposition range. Compared with the Longnan"8.12"torrential rain triggered landslides and debris flow disasters in 2010, the correctness of the FLO-2D model was verified insimulating the threat range of a debris flow. The results showed that the disaster threat simulation is broadly in line with the actual range.