河道糙率反问题在实时洪水预报中的应用(吴晓玲; 王船海)

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河道糙率反问题在实时洪水预报中的应用

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sT3m(i!e4a4[0【作者】吴晓玲; 王船海 【作者单位】河海大学水文水资源与水利工程科学国家重点实验室

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【论文摘要】 针对洪水预报中糙率参数的实时修正问题,采用卡尔曼滤波技术,实现动量方程实时校正糙率参数,以提高水动力学模型的洪水预报精度。对复杂地形所引起的局部动量损失进行处理,使反演的糙率参数更显客观. 选择长江干流寸滩至万县河段进行试验,应用2004年该河段洪水资料作验证.结果表明, 反演的糙率参数对提高实时洪水预报精度有效.水利论文8j CBX {Zb

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【英文论文摘要】 To detect the effect of roughness parameters in real time correction for flood forecasting, and improve the accuracy of hydraulic forecasting model,the Kalman filter was applied to realize the real time correction of the roughness parameters by the momentum equation.In order to reflect the roughness parameters impersonality,the local loss of momentum item was added to momentum equation where complex flow happened between adjacent cross sections of river channel by complex terrain. The calculation of flood forecasting for river section from Cuntan to Wanxian of Yangtze River verifies that the inverse analysis of channel parameters can be resultful in promoting the accuracy of forecasting by adopting the flood information of 2004.水利论文'n"^ cS8^|h4eCU6w

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【论文关键词】 实时洪水预报; 卡尔曼滤波; 糙率参数; 反问题水利论文W.a:{-I }k
【英文论文关键词】 real-time flood forecast; Kalman filter; roughness parameter; inverse analysis
/|$rs7`tJj0S#I0【基金】国家支撑计划项目(2006BAC05B02);; 国家自然科学基金(50679025)资助.
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TAG: 河道 王船海 吴晓玲 洪水预报 实时
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