【摘要】 将山东省莒县沭河流域作为研究对象,以日径流序列分割所得的基流量为基准,研究在周径流序列、月径流序列的条件下基流分割方法的适用性,并进行了验证。结果表明,在莒县沭河流域内,Lyne-Hollick滤波法在周径流序列、月径流序列的基流分割上同样适用;在周径流序列分割时较为合适的滤波次数为3,滤波系数约为0.76;在月径流序列分割时较为合适的滤波次数为2,滤波系数约为0.71,且当利用Lyne-Hollick滤波法对周、月径流序列进行基流分割时,与丰水年相比,平水年和枯水年分割结果与日基流分割结果更为接近。更多还原

【Abstract】 Taking the Shu River basin in Ju county as a research area, and basing on the baseflow calculated by the daily runoff series separation, the applicability of baseflow separation in the case of only weekly runoff series and monthly runoff series was studied. The results show that the Lyne-Hollick digital filtering method can be applied to the baseflow separation of weekly runoff series and monthly runoff series; when the method is applied in weekly runoff series, the filtering times is 3, and filtering parameter is 0.76; when the method is applied in monthly runoff series, the filtering times is 2, and filtering parameter is 0.71. Moreover, when the Lyne-Hollick digital filtering method is uesd in baseflow separation, the separation result is more approximate with daily baseflow separation result in normal flow year and drought year than that in flood year.更多还原