摘要
基于数字流域平台和水力学模型软件HEC-RAS,研究了河道和行蓄洪区地形数据的处理、分洪口门和水利工程的模拟等技术难题,提出了上下游边界条件、初始条件的自动生成方法,模拟河道和行蓄洪区的洪水演进,研制了平原区河段洪水演进模拟系统,模拟河道洪水波在行蓄洪区各种工况条件下的运动过程。该模拟系统应用于流域洪水实时预报调度,评价行蓄洪区启用对洪水过程的影响,为流域防洪调度决策提供定量技术支持。在淮河流域王家坝至临淮岗区间,利用2007年7月份流域性大洪水期间的报汛数据系列,对本文提出的模拟系统进行了率定和验证,并评价了6种洪水调度方案的效果。结果表明系统中非恒定流模型的数值解稳定,模拟的洪水过程与实测系列吻合,客观地反映了研究区域洪水运动过程和行蓄洪区启用对该过程的影响,准确地评价了流域洪水调度方案的效果。
On the basis of the digital river basin and software HEC-RAS, the methods to treat the topography data of the flood channel and the flood flowing and retarding basin as well as the simulation of flood diversion project were studied. The approaches for automatic generating the upper and lower reaches boundary conditions and initial condition were suggested. The combination simulation system for flood propagation in the plain rivers was developed by combining the flood routing through the channel with that through the flood flowing and retarding basins. The system was applied to simulate the flood wave evolution under the different operation scenarios of the flood flowing and retarding basins and as the core of the system for real-time flood forecasting and operation in a fiver basin. The output of the system was adopted to evaluate the effects of flood flowing and retarding basins on flood propagation. The combination simulation system presented in this paper was validated by the data obtained from the Wangjiaba and Linhuaigang inter-reaches located in the Middle Huaihe River basin. There was a big flood all over the basin with several flood peaks in 2007. The first flood peak was used to calibrate the model parameters of the system and the following flood peaks were used to verify the system. The result indicated that the numerical solution of the hydraulic model based on HEC-RAS was stable with high simulating precision and the characteristics of flood propagation were described precisely.
出处
《水利学报》
EI
CSCD
北大核心
2010年第7期803-809,共7页
Journal of Hydraulic Engineering
基金
国家自然科学基金(50879017)
"十一五"国家科技支撑计划(2008BAB29B08-02)
关键词
防洪调度
洪水演进模拟
HEC—RAS
数字流域
flood control of a basin
combination simulation system for flood propagation
HEC-RAS
digital fiver basin
