Development of inundation analysis method considering the feature of elevation in grid and its application

地形（高程分布）的数值表达对洪水分析很重要。虽然细网格尺寸的地形表达式具有较好的精度，但这种分析条件需要更多的分析时间。本文提出了一种考虑网格高程特征的淹没分析新方法，并对其有效性进行了验证。此外，还开发了新的淹没分析方法在筑巢模型和淹没分析模型（陆上洪流量模型+下水道模型）上的应用。

The numerical expression of topographies ( distribution of elevation) is important for inundation analysis. Though the expression of topographies with fine grid size has good accuracy, this analysis condition takes more analysis time. In this study, the new inundation analysis method which considered the feature of elevation in grid is developed and the validity and the effectiveness are shown. Moreover, the application of the new inundation analysis method on nesting model and inundation analysis model ( overland flood flow model+sewer model) are developed.