• 한국농공학회논문집
• /
• 제54권2호
• /
• pp.87-94
• /
• 2012

This study is to evaluate flood inundation and to recommend measures of damage reduction on sediment by concentrated torrential rainfall at Gonjiamcheon Watershed (183.4 $km^2$). Firstly, the SWAT (Soil and Water Assessment Tool) was simulated streamflow and sediment at upstream. Then, we produced a map of floodplain boundary by using HEC-RAS (Hydrologic Engineering Centers River Analysis System) at downstream. The SWAT model was calibrated with 2 years (2008~2009) daily streamflow and validated for another years (2010~2011. 7. 31). The SWAT model was simulated with 3 years (2008~2010) by monthly water quality (Sediment) at Gonjiamcheon water quality station. The streamflow and sediment from SWAT model were input as boundary conditions to HEC-RAS. The results of HEC-RAS indicated that mapping of floodplain boundary was Jiwol and Jiwol 2 district. Additionally, inundation area and depth were assessed and applied BMPs scenario for managing the sediment yield.

• Wind and Structures
• /
• 제27권2호
• /
• pp.137-147
• /
• 2018

Heavy damages to properties with attendant losses were frequently caused by tornadoes in recent years. This natural hazard is one of the most destructive wind events that must be fully studied and well understood in order to keep the safety of structures and infrastructure facilities. On June 23, 2016, a severe tornado, which is an Enhanced Fujita (EF) 4 storm, occurred in the rim of a coastal city named as Yancheng in China. Numerous low-rise buildings as well as facilities (e.g., transmission towers) were destroyed or damaged. In this paper, damages to structures and infrastructure facilities by the severe tornado are reviewed. The collapses of residential buildings, industrial structures and other infrastructure facilities are described. With an overview of the damages, various possible mechanisms of the collapse are then discussed and utilized to reveal the initiation of the damage to various facilities. It is hoped that this paper can provide a concise but comprehensive reference for the researchers and engineers to help understand the tornado effects on structures and expose the vulnerabilities that need to be improved in current wind-resistant design practices.

• 한국농공학회논문집
• /
• 제55권4호
• /
• pp.83-93
• /
• 2013

Annual average precipitation of Korea is 1,277 mm and around 2/3 of annual precipitation and 74 % of available water resources occurred during monsoon period. In recent years, many agricultural reservoirs have been heightened to increase flood control capacity, reduce flooding damage at downstream areas, and provide sustainable environmental flow during drought period. Thus in this study, the flood control effects of heightening of reservoir banks were simulated with HEC-ResSim and HEC-RAS models. These modes were applied to Bonghak reservoir and it was found that flood control effects were 3~4.5 % with 7 -m heightening. Also, with proper operation (1 m lower of full water level) of reservoir right before the monsoon period, flooding at downstream could be prevented even with design storm of 80 -year recurrence interval. As shown in this study, heightening of agricultural reservoir provides positive effects in flood control and flood damage reduction.

• 한국방재학회:학술대회논문집
• /
• 한국방재학회 2007년도 정기총회 및 학술발표대회
• /
• pp.616-619
• /
• 2007

Recently, flood damage has been increased annually by severe rain storm and Typhoon. In this case, it needs to the effective flood management using not only hydrologic data but also numerical map, DEM(Digital Elevation Model), satellite image and so on. At this point in time, therefore, applying mobile GIS technology is expected to increase efficiency about the management of hydraulic structures and can promote LBS(Location Based Service) service for residents. In this study, the flood management technology using mobile GIS is suggested by standing on the basis of a super-highway information network.

• 한국항해항만학회:학술대회논문집
• /
• 한국항해항만학회 2016년도 춘계학술대회
• /
• pp.137-138
• /
• 2016

최근들어, 태풍, 집중호우로 인한 피해 등 국내에서는 크고 작은 풍수해를 격고 있으며, 이와 같은 풍수해는 전세계적인 이상기온의 영향으로 점차 증가하고 있다. 풍수해로 인한 피해는 지상의 구조물, 건물 등의 피해와 함께 지하시설물에 대한 피해도 증가하고 있지만, 지하공간정보의 부족으로 인하여 선제적 예방 및 신속한 대응을 통한 능동적 지하시설물 피해예방대책 수립이 어려운 실정이다. 특히, 호우로 인한 지반침하 및 함몰 등에 의한 지하시설물 피해영향분석을 위해서는 시추정보, 지질정보, 관정정보 등으로 구성된 지반정보의 활용이 절대적이다. 본 연구에서는 현재 국토교통부에서 추진 중인 지하공간통합지도 구축과 관련하여 항만구조물 지역 내 지반정보 구축 방안을 제시하고자 한다.

• 대한원격탐사학회:학술대회논문집
• /
• 대한원격탐사학회 2007년도 춘계학술대회 논문집
• /
• pp.315-319
• /
• 2007

최근 들어 전 세계적으로 자연재해가 급격하게 증가하고 있으며，국내의 경우에 있어서도 홍수，산불，지진 등과 같은 자연재해의 발생빈도， 피해규모 및 피해양상이 매우 다양해지고 었다. 따라서 이러한 다양한 피해양상에 적극적으로 대처할 수 있는 멀티 센서 피해조사 시스템의 개발 및 이를 활용한 신속하고 객관적언 피해 분석 방안이 요구되고 있다. 고해상도 위성 및 다양한 탐측센서의 개발，유비쿼터스 관련 인프라 기술의 확대，그리고 인터넷 및 데이터베이스 관련 기술의 발달은 피해지역의 공간정보의 취득 기회를 획기적으로 증가시켰으며，이러한 다양한 정보들은 멸티 센서기반의 피해정보 분석 시스템의 기반기술들로 활용이 가능하다. 본 연구는 위성영상을 이용한 풍수해 피해조사 기법에 있어서 SAR 영상의 그림자영역 제거와 기하보정 기법을 연구 개선하였으며 광학영상은 객체기반분류 기법을 적용하여 재해조사에 활용할 수 있는 방법을 제시하였다.

• 한국농공학회:학술대회논문집
• /
• 한국농공학회 2003년도 학술발표논문집
• /
• pp.483-486
• /
• 2003

This paper presents how effective the detention storage is to control floods at a test watershed. HEC-HMS model was applied to simulate the effects of the storages of different levels and installation methods on the flood peak reduction. The results showed that the detention storage may significant reduce the flood peaks, and the effectiveness depends on the sizes of the storage and types of installation. The simulated peak values reduce considerably for the design storm events. The results also showed that alternatives to control flood may be evaluated using the model.

• 한국지능시스템학회:학술대회논문집
• /
• 한국퍼지및지능시스템학회 1996년도 추계학술대회 학술발표 논문집
• /
• pp.253-256
• /
• 1996

Rainfall is one of the major and complicated elements of hydrologic system. Accurate prediction of rainfall is very important to mitigate storm damage. The neural network is a good model to be applied for the classification problem, large combinatorial optimization and nonlinear mapping. In this dissertation, rainfall predictions by the neural network theory were presented. A multi-layer neural network was constructed. The network learned continuous-valued input and output data. The network was used to predict rainfall. The online, multivariate, short term rainfall prediction is possible by means of the developed model. A multidimensional rainfall generation model is applied to Seoul metropolitan area in order to generate the 10-minute rainfall. Application of neural network to the generated rainfall shows good prediction. Also application of neural network to 1-hour real data in Seoul metropolitan area shows slightly good predictions.

• 한국방재학회:학술대회논문집
• /
• 한국방재학회 2008년도 정기총회 및 학술발표대회
• /
• pp.605-608
• /
• 2008

Storm and flood damage management systems in national disaster management system(NDMS) were organized into three operation systems. They are prevention, preparation, response, and recovery systems. Disaster resources in each system must be promptly and exactly applied to minimize casualties and loss of properties. However, the disaster resources in current management system can not be immediately used in calamity situation due to the lack of efficiency in statistical data. Therefore, it is necessary to classify the emergency restoration equipment for efficient management and mobilization of disaster resources in disaster situation. In this study, field survey was executed to appropriately classify the emergency restoration equipment. Problems and reformation points of the disaster resources system were also presented to improve the classification technique and to construct the data base.

• 한국방재학회:학술대회논문집
• /
• 한국방재학회 2008년도 정기총회 및 학술발표대회
• /
• pp.309-312
• /
• 2008

In Korea, although the damage from disaster (flood and storm) is increasing, the early stage warning and countermeasure are not in operation rapidly. The research areas of transportation engineering arenot diverse, so once the road is flooded and interrupted, drivers, the system operators and managers are in panic, and nearby roads are in terrible traffic congestion. In case of Korea, the research of evacuation is highly needed, because it is very necessary and easy to apply in real field. In this paper, we establish the concept of transportation disaster prevention system and suggest the directions of it. In addition, based on this research, we choose one example of disasters and establish an example of the transportation disaster prevention system. Our goal is to make steps; prevention, preparation, countermeasure and restoration in the view of minimizing on social chaos and damages emphasizing aspect of transportation countermeasure. This research will be the good precedent of approach, analysis and countermeasure when the disasters are occurred, and a basis of transportation disaster prevention system and manual in Korea.