NDLI: Discussion of Present Isotopic Hydrograph Separation (IHS) Method

Content Provider	IEEE Xplore Digital Library
Author	Weimin Bao Tao Wang Haiying Hu Simin Qu
Copyright Year	2009
Abstract	Runoff sources and dominant flow paths are still poorly understood in most catchments. Consequently, isotope hydrograph separation methods are widely used to improve our understanding about runoff generation. Isotope hydrograph separation (IHS) is based on the mass balance equation of water flux and isotope tracer concentration. The isotope analysis machine (for example, mass spectrum) available can only get the δ-value of the isotope tracer. An analysis is presented for quantifying the error in two- and three- component tracer-based hydrograph separation. This analysis compared the error between ratio balance method and mass balance method in computing mixed fractions to determine which method is more accurate. In the ratio balance method, the ratio of isotope tracer in used in concentration mass balance equation; comparatively, in the mass balance method, the concentration of isotope tracer is used in the same equation. Many studies about two- and three-component tracer-based hydrograph separation are used to illustrate the application of the analysis. Because of the abundance of rare isotopes are so negligible, the difference between two methods is small in the isotopic hydrograph separation studies. In scientific research, it is not appropriate to substitute ratio for concentration in the isotope tracer concentration mass balance equation. Therefore, we recommend the use of mass balance method in the application of isotope hydrograph separation research to improve the degree of accuracy.
Starting Page	124
Ending Page	127
File Size	446977
Page Count	4
File Format	PDF
ISBN	9780769536828
DOI	10.1109/ESIAT.2009.317
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-07-04
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Fractionation Error analysis Laboratories Routing isotope hydrograph separation (IHS) two component Water storage Storms mass balance method Differential equations three component ratio balance method Chemical elements Isotopes Water resources
Content Type	Text
Resource Type	Article

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