摘要
水库入库流量,通常通过实测库水位、出库流量和库容曲线反推,这过程常存在大的、不服从正态分布的误差,使常规的参数估计方法不能使用.为此,提出采用抗差估计方法,研究当河段实测出流遭受粗差和极值误差污染时,抗差最小二乘法用于估计马斯京根汇流参数的效果.给出了两个水库流域的结果,分析了抗差最小二乘法相对于最小二乘法的效果.
Input flow of reservoir,so called 'observed input flow', is usually calculated by the observed water stage,out flow and stage-storage relation line.In this process, coarse errors,which are not of normal distribution characteristics,are offen caused. In this paper,the efficiency that robust estimation is applied to estimating the Muskingum parameters ,as observed reach outflow is contaminated seriously by coarse or extreme value errors and general least square methods are not valid,is studied.Results of two reservoir basins are given to show the efficiency of robust estimation relative to least square estimation.
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2004年第6期13-16,共4页
Engineering Journal of Wuhan University
关键词
洪水预报
汇流参数
抗差估计
flood forecasting
flow concentration parameter
robust estimation.
