• 한국지형공간정보학회:학술대회논문집
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• 2001.11a
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• pp.53-61
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• 2001

우리 나라에서 발생하는 여러 재해 중 자연재해는 각종 재해의 상당 부분을 차지하고 있으며, 이 중 호우에 의한 인명 피해는 연간 수 백명, 재산 피해는 수 천억에 이른다. 매년 여름철 집중호우에 의한 홍수재해는 한강과 같은 대형하천이나 급경사 산간지역에서 주로 발생하던 상황이 근래에 이르러서는 도시지역으로 그 피해가 확산되고 있다. 특히, 최근 몇 년 사이 연속해서 대규모 홍수가 발생하고 있어 수해로부터 국민의 생명과 재산을 보호하기 위해서는 홍수규모에 따라 침수범위를 예측할 수 있는 보다 과학화된 실시간 침수예측시스템 구축이 요구된다. 이에 본 연구는 홍수피해가 큰 한강 상류 일대의 중랑천과 그 주변을 대상지역으로 홍수시 발생한 하천의 유량과 범람량을 DEM에 의해 분석하고 이를 실시간으로 Web GIS와 연계하여 홍수에 의한 침수를 예측하고자 한다.

• Journal of Environmental Impact Assessment
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• v.23 no.6
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• pp.466-476
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• 2014

In this study, 10 species of plants with high adaptability to aquatic environments were compared for selecting plant species suitable for vegetation-based low impact development (LID) facilities. The flooding tolerances of the plants were tested by analyzing their growth status under half-immersion and full-immersion conditions, with varying durations of immersion. In decreasing order of flooding tolerance, the comparative analysis of plant height and leaf width is as follows: Hemerocallis fulva, Juncus effusus var. decipiens, Iris pseudoacorus, Phragmites communis TRIN, Typha orientalis C.Presl, Aster koraiensis Nakai, Iris sanguinea, Equisetum hyemale, Acorus calamus. Specifically, Hemerocallis fulva, Juncus effusus var. decipiens. Iris pseudoacorus showed excellent growth status under both immersion conditions. Iris sanguinea and Equisetum hyemale. withered to death by around day 27 of the experiment, but their flooding tolerance was confirmed to be relatively high. Iris pseudoacoru showed flooding tolerance under the half-immersion condition unlike under the full-immersion condition, when compared on day 21 of the experiment. Aster koraiensis Nakai also thrived better under the half-immersion condition, proving to be a highly immersion-resistant species. On the basis of the results of this experiment, Hemerocallis fulva, Juncus effusus var. decipiens and Iris pseudoacorus, Typha orientalis C.Presl were selected as species suitable for vegetation-based LID facilities.

• Proceedings of the Korea Water Resources Association Conference
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• 2015.05a
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• pp.40-40
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• 2015

최근 기후변화로 인해 홍수의 발생빈도와 홍수량이 증가하고 있으며, 여름철 집중호우 및 태풍에 의해 하천의 둔치가 침수됨으로써 다양한 침수피해를 야기한다. 대하천 사업 이후 하천의 둔치를 활용한 체육시설, 자전거도로 및 생태공원과 같은 친수시설들이 조성되었으며 태풍으로 인한 하천의 홍수위 상승은 이러한 친수시설에 대한 직접적인 피해를 가져올 수 있다. 따라서 이와 같은 침수피해를 예측하기 위해서는 둔치를 포함한 복단면에서의 흐름해석을 통한 수리학적 영향을 분석해야하며, 둔치에서의 흐름양상은 주수로에 비해 수심이 얕고 흐름에 대한 저항이 크기 때문에 2차원 수리해석이 바람직한 것으로 제안되고 있다. 2차원 수리해석에 있어 하천의 홍수위 상승과 하강으로 인해 발생하는 둔치구간에서의 마름과 젖음 현상은 수치해의 발산을 야기하며, 이러한 문제를 해결하기 위해 다양한 마름/젖음 해석 기법에 대한 연구들이 진행되어 왔으며 일반적으로 마름/젖음에 대한 문제를 해결하는 방법은 마름/젖음에 상관없이 모든 부분에서 방정식을 푸는 박막기법과 해석영역으로부터 마름 부분을 제거하는 이동경계법으로 나눌 수 있다. 본 연구에서는 단기간에 수위가 급변하는 태풍사상에 대한 둔치에서의 홍수위험도를 평가하기 위해 마름/젖음 해석이 가능한 2차원 유한차분모형인 Nays2D 모형을 이용하여 마름/젖음에 대한 과거 선행연구들의 결과와 적용된 모형의 결과를 비교하여 모형의 적용성을 검증하였고, 검증된 모형을 강정-고령보에서부터 달성보 사이 구간에 적용하여 수리학적 영향을 분석하였다. 또한, 모형의 결과를 이용하여 홍수위험지수를 산정하였으며, 이를 통해 둔치구간에서의 홍수위험도 평가를 실시하였다.

• Journal of Convergence for Information Technology
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• v.10 no.12
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• pp.110-118
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• 2020

This study developed a evaluation indicators on environmental facilities highly vulnerable to flood damage from quantitative and qualitative perspectives in order to reinforce the ability or preemptive disaster prevention. At first, this study classified the facilities into structural factor and non-structural factor. The structural factor consists of 11 indicators, the non-structural factor consists of 8 internal indicators and 6 external indicators. This study is expected to be prepared for flood damage by evaluating flood vulnerability of environmental facilities.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.22 no.4
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• pp.78-84
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• 2008

Inundation of substation and ground power equipment broke out every summer season in low-lying downtown and low-lying shore by localized heavy rain, typhoon and tidal wave. In case inundation excluding the exchanging cost of equipment, it occurs a great economic and social loss owing to recovery time and events of electric shock occur by inundation electrical facility. So we researched the installation situation of substation and power equipment and inundation loss at Flood Danger Area. And we analyzed refutation or law relating to the flood protection counterplan of US, England Australia. We present flood protection countermeasures by survey and analyzing the internal standard and his paper will be used to resent a reform proposal of electrical feinted law about flood protection.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2005.06a
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• pp.919-922
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• 2005

Generally, we take a bath to obtain a clean body as well as a good health. Human body generates various physical and emotional changes by stimulations of therapeutic effect of heat and hydraulic pressures. Accordingly, we can obtain not only relaxations but also effects of hydrotherapy. The survey of bathing/showering behaviors and therapeutic effect of heat reactions present elementary data for development of a bathing/showering system. However, there are few existing data for bathing/showering behaviors and effects. Consequently, surveys were performed to know patterns of bathing and showering, and relations between physiological changes and water temperature were examined by partial bathing on human body in this study.

• The Journal of the Korea Contents Association
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• v.9 no.1
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• pp.285-292
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• 2009

The purpose of this study was to demonstrate immune-activities by heat therapy. To exam, furthermore, the immune effect is investigated from the healthy volunteer(male:15, female:15) by monitoring changes of immune substances such as complements(C1q, C3, and C4), a comparative study with warm water immersion($40.8{\pm}0.3^{\circ}C$) and infrared(250W) was carried out. The plasma analysis showed that the percentage of C1q, C3, and C4 was decreased in warm water immersion-stimulated group, but not in infrared-applied group, compared with control group from healthy volunteer. Therefore, these results suggest that the thermo-stimulation improved immune activity and inhibited complement-related inflammation through the warm water immersion-dependent classical pathway.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.38 no.2
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• pp.203-213
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• 2018

This study aims to propose the methods for urban flood risk maps which are useful in strengthening urban planning toward disaster prevention by climate change. Selecting the Gwangju city, Gyeonggi-do as study area, it analyzes urban flood at a RCP 8.5 scenario, and develops gridded information regarding risk components such as hazard, exposure, and vulnerability. It turns out that flooding would occur at a bend interval of the Mokhyun stream and also at the joint of the Gyungan and the Mokhyun streams, showing the similarity with the inundation trace map. In particular, the Songjeong dong is analyzed to be seriously exposed and to be highly vulnerable to flood inundation. With all results together, this study concludes that the proposed methods could be used as a basis for strengthening urban planning toward flood disaster prevention system.

• Journal of the Korean Society for Marine Environment & Energy
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• v.14 no.4
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• pp.264-272
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• 2011

Shipbuilders carry out the operation test to check the conditions of the main propulsion system and auxiliaries for moored vessel in the quoy before the sea trial. The estimation of the thrust and torque for the partially submerged propeller should be prepared to ensure the safety of mooring line and the ship. In this paper, the variations of the thrust and torque according to the shaft submergence and the propeller rotating speed in bollard pull condition are investigated with the model test and the numerical analysis. Based on these resaearch, the empirical formula representing the physical phenomena of the partially submerged propeller is derived and validated through comparison to measurement results of full-scale propellers under the quoy operation test.

• Korean Journal of Remote Sensing
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• v.34 no.5
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• pp.787-799
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• 2018

Accurate and effective mapping is critical step to monitor the spatial distribution and change of flood inundated area in large scale flood event. In this study, we try to suggest methods to use low spatial resolution satellite optical imagery for flood mapping, which has high temporal resolution to cover wide geographical area several times per a day. We selected the Sebou watershed flood in Morocco that was occurred in early 2010, in which several hundred $km^2$ area of the Gharb lowland plain was inundated. MODIS daily surface reflectance product was used to detect the flooded area. The study area showed several distinct spectral patterns within the flooded area, which included pure turbid water and turbid water with vegetation. The flooded area was extracted by thresholding on selected band reflectance and water-related spectral indices. Accuracy of these flooding detection methods were assessed by the reference map obtained from Landsat-5 TM image and qualitative interpretation of the flood map derived. Over 90% of accuracies were obtained for three methods except for the NDWI threshold. Two spectral bands of SWIR and red were essential to detect the flooded area and the simple thresholding on these bands was effective to detect the flooded area. NIR band did not play important role to detect the flooded area while it was useful to separate the water-vegetation mixed flooded classes from the purely water surface.