多种数值模拟基流分割法在鄂北丘陵山区随县的应用对比研究

Comparative Research on the Application about Different Numerical Simulation of Base Flow Separation Methods in the Hilly Area of Suixian,Northern Hubei Provinxe

将鄂北丘陵山区随县作为研究区,以设立于随县境内的澴潭站、均川站、随州站、万店站4个水文站实测逐日径流量资料为基础,采用3类9种数值模拟基流分割法对平水年、枯水年、特枯年3个代表年的实测数据进行基流分割,结果表明滤波分析法F4方法基流过程曲线较为平滑,基流指数统计值在0. 20～0. 42,极值比小、方差小,年际和年内基流分割成果最稳定,是9种方法中最为可靠、稳定的基流分割方法。

In this paper,the hilly mountainous region in northern Hubei Province is used as a research area,and is based on the daily runoff data measured at four hydrological stations such as Huantan Station,Junchuan Station,Suizhou Station and Wandian Station established in Suixian.Nine kinds of base flow separation method is used to perform basic flow segmentation on the measured data of the three representative years of flat water year,dry year and special dry year.The results show that the F4 digital filters method has a smooth base flow curve,and the base flow index statistics are between 0.20~0.42,the extreme value and variance are both small,and the results of the base flow division are the most stable during the year and the interannual variability,so that the F4 recursive digital filters is the most reliable and stable base flow segmentation method among the 9 methods.