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    亢小语, 张志强, 陈立欣, 许行, 冷曼曼. 自动基流分割方法在黄土高原昕水河流域适用性分析[J]. 北京林业大学学报, 2019, 41(1): 92-101. DOI: 10.13332/j.1000-1522.20180087
    引用本文: 亢小语, 张志强, 陈立欣, 许行, 冷曼曼. 自动基流分割方法在黄土高原昕水河流域适用性分析[J]. 北京林业大学学报, 2019, 41(1): 92-101. DOI: 10.13332/j.1000-1522.20180087
    Kang Xiaoyu, Zhang Zhiqiang, Chen Lixin, Xu Hang, Leng Manman. Applicability of automatic baseflow separation method in Xinshui River Basin of the Loess Plateau, northern China[J]. Journal of Beijing Forestry University, 2019, 41(1): 92-101. DOI: 10.13332/j.1000-1522.20180087
    Citation: Kang Xiaoyu, Zhang Zhiqiang, Chen Lixin, Xu Hang, Leng Manman. Applicability of automatic baseflow separation method in Xinshui River Basin of the Loess Plateau, northern China[J]. Journal of Beijing Forestry University, 2019, 41(1): 92-101. DOI: 10.13332/j.1000-1522.20180087

    自动基流分割方法在黄土高原昕水河流域适用性分析

    Applicability of automatic baseflow separation method in Xinshui River Basin of the Loess Plateau, northern China

    • 摘要:
      目的昕水河流域是晋西北黄土高原重点流域内的代表性河流,是黄土高原水土流失最严重的地区之一。在黄土高原昕水河流域选择适宜的基流分割方法十分重要。
      方法本文以黄土高原昕水河流域大宁水文站1956—2014年实测径流资料为基础,采用目前国内外普遍采用的4类8种自动基流分割方法进行基流分割,包括数字滤波法(Lyne-Hollick滤波法(DF one)和Eckhardt滤波法(DF two))、基流指数法(标准法和改进法)、时间步长法(固定时间间隔法、滑动时间间隔法、局部最小值法)和PART法,并利用Nash-Sutcliffe系数(E值)和平均相对误差法(MRE值)对基流分割结果进行评价,并通过基流指数特征值和流量过程线,分析不同基流分割方法在昕水河流域的适用性。
      结果DF one(0.925,3次)的准确度更高(E=0.76,MRE=1.24%),所分割基流过程线较为平滑,能够较好的反映出昕水河流域流量过程线退水段的物理规律。
      结论应用DF one(0.925,3次)对昕水河流域进行基流分割是一种稳定可靠的方法。昕水河流域多年基流量平均值为0.45亿m3,多年平均基流指数为0.366。

       

      Abstract:
      ObjectiveXinshui River is a representative river in the key watershed of the Loess Plateau in northern China and is one of the most serious soil erosion areas in this area. Selecting a suitable baseflow separation method is very important in Xinshui River Basin in the Loess Plateau.
      MethodIn this paper, based on the actual daily runoff data from 1956 to 2014, with digital filtering methods (Lyne-Hollick method (DF one) and Eckhardt method (DF two), baseflow index method (BFI), time step method (HYSEP method), and PART method, the Nash-Sutcliffe coefficient and the mean relative error method (MRE) were used to compare and evaluate the data. The suitability of different baseflow separationmethodsin Xinshui River Basin was analyzed from the perspective of the multi-year baseflow index, the stability of the baseflow index and baseflow process line.
      ResultThe results indicated that baseflow was evaluated using the Nash-Sutcliffe coefficient and MRE value, and the accuracy of DF one method (0.925, 3 times) was higher (E=0.76, MRE=1.24%). The digital filtering method was the most stable method to estimate baseflow index.
      ConclusionThe application of DF one method (0.925, 3 times) was a relatively stable and reliable method for the baseflow separation in Xinshui River Basin in the Loess Plateau. The average annual baseflow rate of Xinshui River Basin was 0.045 billion m3 and perennial average baseflow index was 0.366.

       

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