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http://dx.doi.org/10.7857/JSGE.2022.27.1.050

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

Cho, SungHyen (National Instrumentation Center for Evironmental Management, Seoul National University)
Moon, Sang-Ho (Climate Change Response Division, Keorea Institute of Geoscience and Mineral Resources (KIGAM))
Publication Information
Journal of Soil and Groundwater Environment / v.27, no.1, 2022 , pp. 50-59 More about this Journal
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);
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