Journal of the Korean Data and Information Science Society
- Volume 19 Issue 4
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- Pages.1019-1026
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- 2008
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- 1598-9402(pISSN)
Trend Analysis of Stream Qualities In Nakdong River by the LOWESS method
- Yoon, Yong-Hwa (Department of Computer Science & Statistics Daegu University) ;
- Um, Hee-Jung (Department of Computer Science & Statistics Daegu University) ;
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Kim, Jong-Tae
(Department of Computer Science & Statistics Daegu University)
- Published : 2008.11.30
Abstract
The goal of this paper is to analysis the trend of stream quality about the upstream, middle stream and high areas of Nakdong River measurement points from January 1998 to December 2006. and to suggest some policy alternatives in Nakdong river. It used the three different monthly time series data such as BOD (biochemical oxygen demand), TN (Total Nitrogen) and TP(Total Phosphorus), of the three of Nakdong River measurement points. BOD, TN and TP data are analyzed with the LOWESS(Locally Weighted Scatter plot Smoother) nonparametric method.