Applied Study of Baseflow Separation Methods in Watersheds of Loess Plateau

DOU Lin; HUANG Mingbin

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Applied Study of Baseflow Separation Methods in Watersheds of Loess Plateau

- Applied Study of Baseflow Separation Methods in Watersheds of Loess Plateau
- Bulletin of Soiland Water Conservation Vol. 29, Issue 3, Pages: 107-111(2010)
- 作者机构：
  
  1. 中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西杨凌,712100
  2. 中国科学院研究生院,北京,100049
  3. 西北农林科技大学, 陕西杨凌,712100
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2010
- 稿件说明：
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DOU Lin, HUANG Mingbin. Applied Study of Baseflow Separation Methods in Watersheds of Loess Plateau[J]. Bulletin of Soiland Water Conservation, 2010, 29(3): 107-111.
DOI：

DOU Lin, HUANG Mingbin. Applied Study of Baseflow Separation Methods in Watersheds of Loess Plateau[J]. Bulletin of Soiland Water Conservation, 2010, 29(3): 107-111. DOI：

摘要

基流是河川径流在枯水季节的主要径流来源。由于难以通过实测方法获得基流量数据

选择适合的基流分割技术对于基流研究至关重要。利用黄土区6个流域的多年径流量资料

选取PART法、滤波法及滑动最小值法等目前广泛使用的自动基流分割方法对区域内河流的基流量进行了分割

以检验自动基流分割方法在本地区的适用性

并应用选定的基流分割方法对黄土区流域的基流特点做了简单分析。研究结果表明

3种方法所获得的基流指数值有所差异

滤波法分割的基流过程与实际基流状况更为相符。因此

滤波法可作为黄土区流域基流的最优分割方法。应用滤波法得到的研究流域基流占总径流比重为37%～64%

而基流量在近50a中呈现逐渐降低趋势。

Abstract

Basef low is the main source of stream flow in the dry season of a year. Due to the difficulty in measurement

it is important to select an adaptive basef low separat ion method for further baseflow research. In order to test the applicability of automated base flow separation methods on the Loess Plateau

six watersheds located in the hilly and gully region were chosen to estimate several widely used techniques

which are PART

digital filter technique

and smoothed minima method. Comparison shows that the results of all three type methods have little difference. The discharge hydrograph demonst rates that the result of digital filter method is more consistent with the actual discharge condition. Since the true values of the baseflow index are unknown

it is difficult to find which method may give the best estimation. However

the digital filter method appears to be more plausible than other methods for this region and the results from the method are objective and authentic. For the study area

result from digital filter method shows that the basef low index is 37%~ 64%

which means that basef low accounts for a larg e proportion of the total runo ff . However

the baseflow volume has been gradually reduced in the recent 48 years.

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