Filling Gaps in Measured Discharge Series with Model-Generated Series
Publication: Journal of Hydrologic Engineering
Volume 13, Issue 9
Abstract
Gaps in measured discharge series are common in Iceland, especially during winter, but reconstructed series are needed for a number of applications. Modeled series are therefore sometimes used to fill the gaps to create a continuous series, but the modeled inserts may have different statistical characteristics from the observed series, whilst their initial and final values rarely coincide with the corresponding measured values. Where gaps are numerous, individual treatment of each gap is time-consuming and often impractical. A method for adjusting modeled sequences to be inserted into gaps was therefore designed with the objective of reducing the difference between model-generated inserts and recorded series. This paper reports on the performance of the method and shows how an improved fit can be attained by adjusting the model-generated inserts so as to smoothly match the discharges observed before and after a gap.
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Acknowledgments
This analysis was supported by the Nordic Climate and Energy project (CE) and the Icelandic national project Climate and Energy (VO). The second writer thanks SIDA (Swedish International Development Cooperation Agency) and STINT (The Swedish Foundation for International Cooperation in Research and Higher Education) for support. During the development of this work, the third writer was a guest researcher at the Department of Water Resources Engineering, Lund University, under the support of STINT Institutional Grant.
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Information
Published In
Journal of Hydrologic Engineering
Volume 13 • Issue 9 • September 2008
Pages: 905 - 909
Copyright
© 2008 ASCE.
History
Received: Dec 21, 2006
Accepted: Sep 28, 2007
Published online: Sep 1, 2008
Published in print: Sep 2008
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