• Journal of the Korean Geographical Society
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• v.41 no.6 s.117
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• pp.670-681
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• 2006

The purpose of this study is to clarify the behavior of subsurface water flow during rainfall on the hillslope in the Dongguneung experimental basin. As a result of the study, the following conclusions were obtained. Under the total rainfall of 20mm, there were no groundwater level changes. However, it was found that total rainfall amount and rainfall intensity were important factors to change groundwater level in hilly slope. Also the rainfall duration and preexisted rainfall amount were important factors to change it on the head hollow. To analyze the modification of 'U-shaped Gol' landform, the pattern of return flow and through flow have to check during storm events. The microgeomorphic change of head hollow is based on the pattern of subsurface water flow.

• Journal of the Korean Institute of Rural Architecture
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• v.12 no.2
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• pp.39-48
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• 2010

This study is to analyze the space plan and design charateristic of the Gungiip(宮家) built on near the 1770 in Namyangju. It has been called Gungjip since it was constructed from the timber and by carpenters sent of the government. It has a great scientic value because it is the best house constructed by carpenters of the royal palace. It help to know prototype of their excellent design skill. that is skill of work upon of colum, curvatere of ridge in roof, trust the eaves. This paper shows that this house has a different scale and form from other houses. In addition, Anchae was built with the aim of making the most use of sunlight and securing its best convenience. Sarangchae aims at serving as a cultural space for its neighbor. The house seems to reflect the carpenter' architectural viewpoints, and its building style shows its contempory people's life style. In conclusion, we can say that the techenial charateristics of its design result from the correlectin of colum(Ki-Sot-Um and An-Sol-Lim), curvatere of ridge in roof(Ma-Ru-Gock), and trust the eaves(Ang-Goak and An-Hu-Ri).

• Journal of Korean Society of Coastal and Ocean Engineers
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• v.33 no.4
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• pp.168-178
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• 2021

Numerical simulations were implemented to look into the modified seabed topography due to the presence of breakwaters of varying reflection characteristics. The numerical model was composed of OlaFlow, an OpenFoam-based tool box, and a physics-based morphology model [Seoul Foam]. In doing so, the interaction between the seabed, which undergoes deformation due to siltation and scouring, and the incoming waves was described using Dynamic Mesh. The rubble-mound, vertical, and curved slit caisson breakwaters with varying reflection characteristics resulted in standing waves that differ from each other, shown to have a significant influence on the seabed topography. These results are in line with Nielsen's study (1993) that sands saltated under the surface nodes of standing waves, where the near-bed velocities are most substantial, convected toward the surface antinodes by boundary-layer drift. Moreover, the crest of sand waves was formed under the surface antinodes of standing waves, and the trough of sand waves was formed under the surface antinodes. In addition, sand wave amplitude reaches its peak in the curved slit caisson with a significant reflection coefficient, and the saltation of many grains of sand would cause this phenomenon due to the increased near-bed velocity under the nodes when the reflection coefficient is getting large.