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Analysis of Relationship between Spatial Distribution of Land Use and Water Quality in Agricultural Reservoirs  

Lee, Sae-Bom (Department of Environmental Science, Konkuk University)
Yoon, Chun-Gyeong (Department of Environmental Science, Konkuk University)
Jung, Kwang-Wook (Department of Environmental Science, Konkuk University)
Jang, Jae-Ho (Department of Environmental Science, Konkuk University)
Jeon, Ji-Hong (Department of Agricultural and Biological Engineering, Purdue University)
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Abstract
This study covers the relationship between land use and water quality items. The kinds of land used in this study were almost agricultural areas with paddy fields and mountains. We set up zones at intervals of 200 m along 48 watersheds all over the country. The analysis showed high relationship between the water quality and the land use specially on the areas in the 400 m radius from the stream so that the areas needed to have strict managements. In the cases of residential area and upland, the positive correlation had a tendency to be lower when they were farther away from the stream. It depended on the increase of rainfall during July and August which affected on the water quality of reservoirs. The correlation analysis of paddy fields resulted in negative relationship, which indicated that paddy fields did not have negative effect on the quality of the stream. Through adequate irrigation and Management, paddy fields may be led to have positive effect on the quality of the reservoirs. In the case of forest, it also resulted in negative correlation so it was concerned as a positive factor which helped to improve water quality. Furthermore more than 00% of the land used in this study is comprised of forest so that it would have a positive effect on the reservoir management.
Keywords
reservoirs; water quality; land use; correlation analysis;
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Times Cited By KSCI : 2  (Citation Analysis)
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