摘要
简要分析了目前二维洪水淹没模拟的研究进展,基于流域20m DEM数据和实测流量资料,利用二维洪水淹没模拟模型对北京雁栖河下游河道在设定频率下洪水淹没情况进行了模拟,采用Nash-Sutcliffe系数对模型模拟水位结果进行了验证,结合G IS技术对模拟范围、模拟水深、淹没土地进行了分析。结果表明,模型模拟水位误差在0.235m左右,Nash-Sutcliffe系数为0.78,模拟结果可靠。该模型系统能为洪水风险图绘制、洪泛区管理、洪灾损失评价等提供强有力的技术支撑。
The trend of two-dimensional flood routing modelling research is briefly analyzed.Based on the 20 m DEM data and observed discharge of Yanqi River,the flood-inundation under the designed flood frequency of the downstream channel is simulated herein with the two-dimensional unsteady flood-routing model.Furthermore,the simulated result is validated with Nash-Sutcliffe coefficient,and then,the simulated area,flood depth and land-inundation are analyzed as well.The result shows that the result is reliable with ...
出处
《水利水电技术》
CSCD
北大核心
2009年第3期62-64,73,共4页
Water Resources and Hydropower Engineering
关键词
二维洪水模拟
GIS技术
河道洪水
洪水风险图
雁栖河
北京市
two-dimensional flood modelling
GIS technique
river channel flood
flood risk map
Yanqi River
Beijing
