摘要
本文提出了入库区间地貌单位线模型,把地貌单位线理论成功地应用于水库区间洪水预报方面。Rodriguez—Iturbe和Gupta等人假定等待时间的概率密度函数(pdf)服从指数分布,本文在此假定基础上推出了入库区间k条并联支流等待时间之和的pdf服从爱尔朗分布。已经证明服从指数分布的地税单位线是服从爱尔朗分布的地貌单位线的特例。指数分布的地税单位线只能用于单条河流的汇流计算;本文提出的入库区间地税单位线,不仅能用于一条河流而且也能用于水库区间具有k条并联支流入库的区间汇流计算,为无资材的入库区间洪水预报提供了一条较好的途径。本文选择了贵州省红枫水库的水库区间检验本模型,获得了令人满意的结果。
In this paper, the geomorphologic unit hydrograph (GUH)model for reservoirregion was established, and the theory of GUH was successfully applied to forecast reservoir inflow. Rodriguez—Iturbe and Valdez (R—V), Gupta, Waymire and Wang (G—W—W)et al had assumed the probability densityfunction (pdf) of waiting time in a stream to obey exponential distribution[2] [3]. On the basis of this assumption, we have deduced pdf of the amount of the waiting time of k tributary streams in reservoir region to obey Erlang distribution. It has been proved that GUH of the witing time pdf to obey exponential distribution is a special case of GUH to obey Erlang distribution
关键词
水库
地貌学
单位过程线
Geomorphology
Unit hydrograph
Probability distribution functions
Waiting time
