格子内の地盤高特性を考慮した簡便な氾濫解析法に関する研究 STUDY ON EFFECTIVE INUNDATION ANALYSIS METHOD CONSIDERING CHARACTERISTICS OF GROUND ELEVATION IN CALCULATION GRID
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Inundation analysis method has been used on measures for water disaster in many cities. In the inundation analysis method the various hard and soft measures are examined and applied to actual field. Recently, the detailed ground elevation data are obtained by development in the survey technology. However, as the usual analysis method treats average ground elevation and average water depth in analysis grid, the detailed ground level data is not used effectively. In this study, the new inundation analysis method is developed and the validity of this analysis model is examined by comparison between analysis results by using normal analysis model and that by using new analysis model presented here. The new analysis model presented here treats inundation water volume as unknown value. Therefore, continuity equation becomes the equation related with water volume. Next, inundation water depth is obtained from prepared function of water depth and water volume. Finally, the momentum equation without advection term and viscosity term is analyzed by considering the characteristics of ground elevation.
- PROCEEDINGS OF HYDRAULIC ENGINEERING
PROCEEDINGS OF HYDRAULIC ENGINEERING (52), 853-858, 2008
Japan Society of Civil Engineers