摘要
针对流域汇流速度和降雨时空变异性等不确定性因素为地貌瞬时单位线研究的难点问题,采用人工扰动法分析了汇流速度的敏感性,统计分析得出流域暴雨中心为汇流速度的主要影响因子,并建立了两者间的关系,进而由暴雨中心来推求汇流速度;同时比较分析了不同流域河网级别对地貌瞬时单位线的影响程度,得出流域河网级别为影响其他地貌参数的综合性参数,并选出适于研究流域水文模拟的最佳流域河网级别。
The uncertainty factors such as concentration velocity and spatial and temporal variability of rainfall are difficult problems of GIUH study.Artificial perturbation method is used to analyze the sensitivity of concentration velocity.The relationship between watershed storm center and concentration velocity is established and it obtains that the storm center is the main factors affecting the concentration velocity with statistical analysis method.Then the concentration velocity is deduced from the storm center.At the same time,the influence of different river network level on GIUH is comparative analysis.It finds that the river network level is a comprehensive parameter which affects other geomorphological parameters and there is the best river network level suitable for studying hydrological modeling.
出处
《水电能源科学》
北大核心
2011年第9期16-19,共4页
Water Resources and Power
关键词
地貌瞬时单位线
参数敏感性
汇流速度
流域河网级别
geomorphological instantaneous unit hydrograph
parameter sensitivity
concentration velocity
river network level
