• A Comparative Study on the Storm Hydrograph Separation Methods for Baseflow through Field Applications

  • SungHyen Cho1*·Sang-Ho Moon2*

  • 1National Instrumentation Center for Evironmental Management, Seoul National University, Seoul 08826, Korea
    2Climate Change Response Division, Keorea Institute of Geoscience and Mineral Resources (KIGAM), Deajeon

  • 수문곡선의 기저유출분리 방법에 대한 고찰

  • 조성현1*·문상호2*

  • 1서울대학교 농생명과학공동기기원
    2한국지질자원연구원 기후변화대응연구본부 지하수환경연구센터

  • This article is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

There are several methods for separating the baseflow from the hydrograph, and graphical methods (GM) have mostly been used. GMs are those that separate the baseflow from the direct flow simply by connecting rising point with inflection point or points related to some duration from a hydrograph. Environmental tracer method (ETM) is another tool researched and developed under several conditions to estimate the groundwater recharge. The goal of this study is to separate the baseflow component from a storm hydrograph by applying various GMs and ETM, and to compare their results. The baseflow component estimated by ETM was different from the results by GMs in terms of their shapes of fluctuation and flow rates. Another important feature is that the form of the baseflow to which ETM is applied is similar to that of a storm hydrograph. This similarity is presumed to be due to the selection of tracer that respond quickly to rainfall.


Keywords: Baseflow, Direct flow, Hydrograph separation, Graphical Method (GM), Environmental Tracer Method (ETM)

This Article

  • 2022; 27(1): 50-59

    Published on Feb 28, 2022

  • 10.7857/JSGE.2022.27.1.050
  • Received on Jan 7, 2022
  • Revised on Jan 11, 2022
  • Accepted on Feb 21, 2022

Correspondence to

  • SungHyen Cho 1·Sang-Ho Moon 2

  • 1National Instrumentation Center for Evironmental Management, Seoul National University, Seoul 08826, Korea
    2Climate Change Response Division, Keorea Institute of Geoscience and Mineral Resources (KIGAM), Deajeon

  • E-mail: sunghc@snu.ac.kr, msh@kigam.re.kr