常用的两种河道槽蓄量计算方法,存在有效计算参数较少,计算粗略及结果不能可视化的缺点。基于DEM模型的河道槽蓄量计算方法,是在矢量化河道地形图上提取带高程信息的图形要素生成河道的数字高程模型,给定计算边界,然后依据DEM原理计算河道槽蓄量的新方法。该方法不仅可以提高计算结果精度,而且结果可以实现三维可视化,能确定槽蓄量分布状况,有利于防洪抗险的决策。 The commonly used methods for calculating the stock volume of two channels have some shortcomings of less effective calculation parameters, coarse calculation and no visualization of the results. The calculation method of channel reserve based on DEM model is to extract the graphic elements with elevation information from the vectorized channel topographic map to generate the digital elevation model of the channel and to calculate the boundary and calculate the channel volume according to the DEM principle . The method can not only improve the accuracy of the calculation results, but also realize the three-dimensional visualization of the results, determine the distribution of the storage capacity of the slots, and facilitate the decision-making of flood control and risk resistance.