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http://dx.doi.org/10.3741/JKWRA.2012.45.1.91

Extension Techniques of 8 Day Interval Recorded Stream-flow Data to Daily One  

Baek, Kyong-Oh (Department of Civil Engineering, Hankyong National University)
Yim, Dong-Hee (Department of Environmental Policy, Gyeonggi Research Institute)
Publication Information
Journal of Korea Water Resources Association / v.45, no.1, 2012 , pp. 91-99 More about this Journal
Abstract
In this study, it was proposed that extension techniques of 8 day interval recorded stream-flow data which has been produced at the mouth of unit watersheds for TMDLs to daily one. The concept of this method was that the missing data at partial recording station was filled by using the daily data at a nearby, hydrologically similar streamgaging station. First, same day stream-flow was extracted from the daily stream-flow. Then, the extension equation was developed based on the sample data when the same day stream-flow from daily data and the partially recorded stream-flow was deeply related each other. The missing data was interpolated or extrapolated by the equation. Especially the maintenance of variance extension (MOVE) technique was used to derive the equation and was validated. Finally the 8-day interval recorded stream-flow at the mouth of unit watersheds in Han River Basin for TMDLs was extended to continuously daily data by using the method proposed in this study. And the low flow at each unit watershed was evaluated according to the flow-duration curve.
Keywords
TMDLs; unit watershed; partially recorded stream-flow; continuously gauging stream-flow; low flow;
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Times Cited By KSCI : 1  (Citation Analysis)
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