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http://dx.doi.org/10.9715/KILA.2013.41.6.043

Testing Non-Stationary Relationship between the Proportion of Green Areas in Watersheds and Water Quality using Geographically Weighted Regression Model  

Lee, Sang-Woo (Dept. of Environmental Design, Konkuk University)
Publication Information
Journal of the Korean Institute of Landscape Architecture / v.41, no.6, 2013 , pp. 43-51 More about this Journal
Abstract
This study aims to examine the presence of non-stationary relationship between water quality and land use in watersheds. In investigating the relationships between land use and water quality, most previous studies adopted OLS method which is assumed stationarity. However, this approach is difficult to capture the local variation of the relationships. We used 146 sampling data and land cover data of Korean Ministry of Environment to build conventional regressions and GWR models for BOD, TN and TP. Regression model and GWR models of BOD, TN, TP were compared with $R^2$, AICc and Moran's I. The results of comparisons and descriptive statistics of GWR models strongly indicated the presence of Non-Stationarity between water quality and land use.
Keywords
Land Use; Water Quality; Forest Effects; Nakdonggang;
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