| 摘要: |
| 溃坝洪水风险图对于制定区域防洪应急预案、进行溃坝洪水风险分析是十分必要的.利用BREACH模拟溃口,采用无结构网格有限体积法进行二维溃坝洪水演进计算,利用TIN模型将计算结果可视化,制作成水深风险图、流速风险图、淹没历时风险图、洪水到达时间风险图,并对风险图进行了空间分析.本文充分利用了GIS对空间数据以及空间数据和属性数据联合分析的功能,对溃坝洪水风险图制作的基本原理和方法进行了探讨,并应用于沙河集水库大坝溃坝模拟,具有较强的实用价值. |
| 关键词: 风险图 溃坝 数值模拟 TIN模型 空间分析 |
| DOI： |
| 分类号:TV122.4 |
| 基金项目:"十一五"国家科技支撑计划项目
，
"948"推广项目
，
科技部科研院所社会公益研究专项 |
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| Technologies for dam-break risk mapping based on DTM |
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WANG Xiao-hang,LI Lei,SHENG Jin-bao,PENG Xue-hui
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WANG Xiao-hang,LI Lei,SHENG Jin-bao,PENG Xue-hui(State Key Laboratory of Hydrology-Water Resources , Hydraulic Engineering,Nanjing Hydraulic Research Institute,Nanjing 210029,China)
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| Abstract: |
| Dam-break flood risk mapping is necessary to formulate flood prevention emergency plans and make analysis of dam-break risk.BREACH is used to stimulate changes in the shape of the break and calculate break-induced flow discharge.Two-dimension dam-break flood propagating numerical simulation is conducted based on unstructured grids and FVM.TIN model is applied to visualize the numerical simulation results.Risk maps of flood depth and flood velocity at different moments of dam-break,risk map of flood submerge... |
| Key words: flood risk mapping dam-break numerical simulation TIN model spatial analysis |
