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本文基于空间离散化理论与方法和DEM技术,将城市地表划分成一系列网格单元,从水平方向和垂直方向研究城市地表空间位置和综合因素的空间离散化描述、表达以及参数模型化处理机制,创新构建出一个特定的以DEM空间离散化解析函数式表达的、综合顾及城市地表地形特征、下垫面物质形态和人工建筑物等因素的地表产流和汇流模型,实施城市地表产流和汇流的路径以及水流累积量的分析计算。
Based on the theories and methods of spatial discretization and DEM technology, the paper divides the urban surface into a series of grid units, studies the spatial discretization description, expression and parametric modeling mechanism of urban spatial location and comprehensive factors from the horizontal and vertical directions, A specific model of surface runoff and confluence that takes DEM spatial discretization into analytic functional expression into account and takes into account factors such as urban surface topography, underlying material morphology and artificial structures is innovated to implement urban surface runoff and confluence The path and the cumulative amount of water analysis and calculation.