山区暴雨泥石流预报数学模型的研究  

Research on Mathematical Model of Mountainous Rainstorm Debris Flow Prediction

作　　者：李大鸣[1] 吕会娇[1] 

机构地区：[1]天津大学建筑工程学院暨港口与海洋工程教育部重点实验室,天津300072

出　　处：《中国农村水利水电》2011年第6期24-28,35,共6页China Rural Water and Hydropower

摘　　要：采用有限体积方法,研究了计算区域网格自动划分、GIS图形数据采集、单元中心和节点的混合式地形插值、河网单元通道概化,提出了河道型、坡面型、陡坡型水流计算的处理模式,给出了不同重现期的面雨量暴雨过程,建立了山区暴雨泥石流预报数学模型。结合桂林地区地质、气象、地形等特点,对地质条件、地形条件、水动力条件和泥石流起动影响条件进行单元域化、数字化处理,提出了桂林地区在暴雨作用下不同区域泥石流发生可能性的判定条件,取得了不同重现期暴雨过程条件下桂林地区泥石流发生危险程度的计算成果,并与桂林地区地质灾害分布图比较,危险区域范围基本吻合。Finite volume method is used in this paper to simulate flow.Model grids are generated automatically.Data are collected from GIS,Module terrain is interpolated,and the river channel unit is generalized.The calculation and the treatment of river-type flow,ground type flow,and abrupt slope-type flow are provided.Rainfalls in different return periods are calculated,a mountainous rainstorm debris flow prediction model is established.Geology feature,meteorology feature and topography feature of Guilin are analyzed to figure the geological conditions,topography conditions,hydrodynamic conditions and influencing conditions digitally in unit.The possibility standard of formatting debris flow is pointed out.The debris critical zone in Guilin is calculated under the rainstorm in different return periods and contrasted with the debris zone with distribution diagram of plagioclase landslide and debris flow disasters in Guilin.

关 键 词：暴雨泥石流预报 数学模型 有限体积 河网概化 

分 类 号：TV87[水利工程—水利水电工程] P333[天文地球—水文科学]