• Proceedings of the Korean Society of Agricultural Engineers Conference
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• 2003.10a
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• pp.647-650
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• 2003

To provide the basic information for the water quality improvement of the Geumkang River Basin, the water qualities of the Namdae-cheon watershed were investigated from May in 1999 to September in 2003.

• Proceedings of the Korea Water Resources Association Conference
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• 2004.05b
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• pp.671-675
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• 2004

The objective of this study is to develope estimation techniques of flood inundation area for given rainfall frequency using GIS. For this, Namdae-cheon is selected as pilot station and Inundation area is estimated with routing of flood volume from river mouth to upstream. As a results inundation area of Namdae-cheon estimated with $1.5km^2\~9.7km^2$ for $5\~500$ frequency years. In addition it is noted that results of this study can use in flood risk analysis for establishment of flood countermeasures.

• The Korean Journal of Quaternary Research
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• v.22 no.2
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• pp.19-22
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• 2008

• Journal of the Korean Geographical Society
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• v.49 no.1
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• pp.1-17
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• 2014

This study estimates geomorphological processes of fluvial terraces by uplifts and bedrock features, by the analyses of topography, distribution, formation age and incision rate of fluvial terraces using Gwang-cheon River in Uljin, Namdae-cheon River in Pyeonghae and Osip-cheon River in Yeongdeok located in the southern Taebaek Mountain Range. The tectonic and climatic terraces I in the upper reaches of Gwang-cheon River with an altitude from riverbed of 9~12m indicate the formation age of MIS 2 with a incision rate of 0.40m/ka. However, the tectonic and climatic terraces I in the upper reaches of Osip-cheon River with an altitude from riverbed of 7~10m show the formation age of MIS 3 with an incision rate of 0.10m/ka. These results suggest that the uplift rate in the Gwang-cheon River basin is likely to be higher than that in the Osip-cheon River basin. Unlike the lower reaches of Osip-cheon River, the thalassostatic terraces are not found in the lower reaches of Gwang-cheon River, because the basin has low maintainable ability of landforms in river valley due to high uplift rate and bedrock properties resistant to weathering and erosion. On the other hand, the lowest tectonic and climatic terraces in the study areas indicate different formative ages and the terraces during the cooling stage in interglacial as well as during interstadial are also found. Therefore, this study suggests that chronological method for fluvial terrace by the previous developmental model of climatic terrace should be reconsidered.