摘要
提出一个可考虑回水顶托及旁侧入流影响的线性扩散波方程水位解析解模型，并对其响应函数特性进行了研究。该模型是一个集总参数的水位预报模型。模型只包括：谢才系数Ｃ和反映河道断面不规则影响的扩散系数ＤＫ，并可由试错或优化法求出。对于给定的上、下边界条件和旁侧入流，模型可快速给出各内插断面的水位过程。选用长江荆江河段１９８１年～１９９０年３４次洪水资料进行参数率定，１９９１年～１９９３年７次洪水资料进行模型检验，结果令人满意。
In this paper, based on the analytical solution of linear diffusion wave equation with water level, a flood routing model of channel is developed, which has clear physical significance and takes all kinds of effects (backwater and lateral inflow) in the flood wave movement into account, so that it has wide useable range. It doesn′t require detailed data of cross sections or river bed geometry but requires only their average values. In this model an excellent means to analyze individual or overall effects of boundary conditions is provided. When it is applied to Jingjiang channel of the Yangte River which is a complex network with join of tributaries and distributaries as well as Dongting lake water system, it shows good results.
出处
《水科学进展》
EI
CAS
CSCD
北大核心
1997年第2期130-136,共7页
Advances in Water Science
关键词
扩散波
解析解
水位预报
响应函数
diffusion wave
analytical solution
water level forecast
responsive function.
