• Journal of the Korean earth science society
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• v.42 no.5
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• pp.479-495
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• 2021

This study investigates the synoptic (patterns of southern highs, northern lows, and lows rapidly developed by tropopause folding), thermodynamic, and kinematic characteristics of a strong wind that occurred in the Yeongdong region of South Korea on March 18-20, 2020. To do so, we analyzed data from an automatic weather station (AWS), weather charts, the European Centre for Medium-range Weather Forecasts (ECMWF) reanalysis, rawinsonde, and windprofiler radars. The daily maximum instantaneous wind speed, exceeding 20 m s^-1, was observed at five weather stations during the analysis period. The strongest instantaneous wind speed (27.7 m s^-1) appeared in the Daegwallyeong area. According to the analysis of weather charts, along with the arrangement of the north-south low-pressure line, the isobars were moved to the Yeongdong area. It showed a sine wave shape, and a strong wind developed owing to the strong pressure gradient. On March 19, in the northern part of the Korean Peninsula, with a drop in atmospheric pressure of 19 hPa or more within one day, a continuous strong wind was developed by the synoptic structure of the developing polar low. In the adiabatic chart observed in Bukgangneung, the altitude of the inversion layer was located at an altitude of approximately 1-3 km above the mountaintop, along with the maximum wind speed. We confirmed that this is consistent with the results of the vertical wind field analysis of the rawinsonde and windprofiler data. In particular, based on the thermodynamic and kinematic vertical analyses, we suggest that strong winds due to the vertical gradient of potential temperature in the lower layer and the development of potential vorticity due to tropopause folding play a significant role in the occurrence of strong winds in the Yeongdong region.

• Journal of the Society of Disaster Information
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• v.19 no.1
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• pp.1-9
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• 2023

In order to carry out construction work, it is urgent to introduce a proper wage system so that the cost burden of projects that have been won due to bleeding competition among original government buildings based on low-priced bids can be transferred to subcontractors. Purpose: Construction with illegal multi-level industrial structure needs to improve the wage reduction environment leading to order (100%) → original contractor (80%) → subcontractor (65%) → load contractor (65%) and aims to ensure wages for end workers. Method: Investigate the current status of labor cost appropriate payment plan in the construction industry, and investigate the case of the appropriate wage system (P.W) in the United States. In addition, the effect and direction of the appropriate wage system are presented. Result: Individual minimum wage security was also mentioned in the Constitution, and many researchers suggested that only the introduction of an appropriate wage system could solve the problem of reducing worker labor and ensure quality and safety. Conclusion: The proper wage system in the construction industry will block illegal multi-level and illegal foreign work, improve the labor environment in the construction market, create an influx of young workers, and have a significant impact on the construction industry's competitive structure, safety, and quality.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.7
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• pp.92-102
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• 2016

In this study, the systems and standards for temporary equipment and materials established in domestic and foreign countries are examined to provide improvement schemes and to insure their safety. Statistical analyses of the data obtained from the internet and/or field visit surveys of employees working in manufacturing, leasing, and construction companies related to temporary equipment and materials and improvement schemes were conducted to evaluate the implementation of a safety certification system for currently used temporary equipment and materials. This safety certification system has been enforced since 2009, but the number of accidents at construction sites, which are reported by the 'serious accident cases and measures in construction sites' group of the Korea Occupational Safety & Health Agency (KOSHA), has increased. The respondents' answers regarding the suitability of the items, which are required for the safety certification of the equipment and materials, were 'yes (36%)', 'no (30%)', and 'unknown (35%)'. Less than half of the answers regarding the current system were positive and most of the respondents answered that the current system does not reflect the evolution of the construction environment. A system is needed to approve items certified in foreign countries and newly developed materials and items, in addition to the (automatic) registration for the reuse of temporary equipment and materials, and improvements are needed in their safety. In this study, after examining the size and practicability of the items requiring approval from the current system, the certification methods are reevaluated and improvement schemes are provided for the system.

• Magazine of the Korean Society of Hazard Mitigation
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• v.11 no.1
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• pp.54-64
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• 2011

본 연구에서는 기상청 기상관측소 325개소(기상관서:61개소, 자동기상시스템(AWS):264개소)의 관측자료를 이용하여 우리나라 최근 10년간의 강수 현황, 평년대비 변화 추세, 그리고 전국적 가뭄년도의 강수 특성에 대한 분석을 수행하였다. 최근 10년간의 연강수량은 평년 대비 7.3% 증가하는 추세로서 7월의 경우 평년 대비 25% 증가하나 11월의 경우 34% 감소하여 가뭄과 홍수의 자연재해 발생 위험도가 높아지고 있음을 보여주고 있다. 최근 10년간의 언론보도 조사결과, 가뭄이 발생하지 않은 2003년을 제외하고 매년 지역적 강수부족으로 제한급수가 실시되어져 지역적 강수부족은 매년 존재하고 있음이 확인되었다. 가뭄년도와 비가뭄년도의 월별 강수 변화 분석결과, 최근 20년 전국적 가뭄이 발생한 연도에는 2-5월사이 10년 평균강수량에 못미치는 강수가 발생하고 있음이 나타났고 이 특성을 이용한 누적강수량의 지속적 감시는 가뭄 조기경보 가능성을 보여주고 있다고 사료된다. 이에 관하여 최근 90일 누적 강수량과 댐 수위 상황도를 산출하고 이를 사례분석하여 보았다. 이 방법을 사용할 때 현재(2011년 3월말) 강수부족이 지속된다면 낙동강 중 상류지역에 물부족이 발생 가능성이 높을 것으로 예상된다.

• Proceedings of the Korea Water Resources Association Conference
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• 2011.05a
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• pp.192-196
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• 2011

보는 일반적으로 수위를 조절하고 취수를 하기 위한 목적으로 하천을 횡단하여 설치한다. 하천에 설치되어 있는 보는 대부분이 고정보로써 흐름의 정체를 유발시켜 토사퇴적 및 수질 악화를 가져오며 하천환경을 파괴하는 원인이 되기도 한다. 이러한 이유 때문에 최근에는 기존의 고정보가 아닌 저수용량을 조절할 수 있는 가동보가 개발되어 설치가 계속적으로 늘어가고 있는 실정이며, 또한 자정효과 및 토사퇴적 경감효과를 위한 여러 가지 방안이 연구되고 있다. 가동보 중 고무보는 시공실적이 많고 유지관리가 용이하지만 인위적인 파손이나 자연재해로 인해 고무시트가 파손될 경우 하천에 피해를 입히게 되며 장시간 방치시 고가의 유지보수비가 소요된다. 또한 고무보의 내구연한이 30년 이상으로 하천의 안전과 올바른 용수확보를 위해서 적절한 운영 및 유지관리가 필요하다. 이에 본 연구에서는 고무보 운영시 유지보수사례를 조사하여 원인을 파악하고, 기존 고무시트에 마모확인이 가능하며 방탄/방검 기능을 추가한 고무시트를 고무보에 시공시 내구성, 안전성, 유지관리 및 경제성 등에 대해 분석하였다.

• Journal of the Society of Disaster Information
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• v.16 no.1
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• pp.155-162
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• 2020

Purpose: The purpose of study was to identify problems in disaster recovery resource management and operation through on-site investigation and utilize them as improvement proposal for disaster recovery resources management by local governments. Method: Areas with high natural and social disasters recorded in historical and yearly records of natural and social disasters, related books, and annual reports for 20 years were selected. The DRSS data of the selected local governments were analyzed and the reserve warehouse were selected for field survey. Result: It is analyzed that the current situation in the city hall and district offices is somewhat insufficient due to heavy work by the working-level officials of local governments on the storage of disaster recovery resources. The actual amount of stockpiles and DRSS data are somewhat different or missing because the input method and criteria are not clear at present when inputting the current data. Conclusion: To improve the management of the disaster recovery resource reserve, it is deemed that education of DRSS and training of best practices for the operation of disaster management resources are urgently needed, and that a systematic management of stockpiles using disaster prevention experts will be required.

• Land and Housing Review
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• v.6 no.4
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• pp.153-164
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• 2015

This paper aimed at drawing out urban planning techniques and strategies for climate change adaptation. To achieve these goals, the following specific objectives were carried out: First, through a review of previous studies and related theories, thirty-three planning techniques were derived and categorized into five sectors and twelve planning goals. Second, current application level was analyzed and applicable planning techniques were derived from urban cases in US and Europe. Third, final planning techniques for climate change adaptation were derived through working group and experts' brainstorming. Lastly, strategies for climate change adaptation proposed. This paper would be the basic source and comprehensive information on establishment of urban planning for climate change adaptation.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.5
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• pp.176-183
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• 2018

Climate change, rapid urbanization, and population concentration have led to a higher frequency and magnitude of disasters in the world. Recently, the occurrence of large-scale complex disasters, which are caused by a combination of natural disasters, man-made disasters, and social disasters, is increasing. In Korea, there are many case studies of damage prediction and response technology development for individual natural disasters, such as earthquakes, floods, and typhoons. On the other hand, the system basis for the efficient response and management of large-scale complex disasters is insufficient. Therefore, this study examined the representative cases of natural, social disasters, and related cases of domestic disaster response management systems. In addition, this paper proposes ways to improve the legal system for complex disaster management policies and establish a cooperation system between the ministries for an efficient response.

• Journal of Korean Society of Disaster and Security
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• v.6 no.1
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• pp.9-17
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• 2013

Government ministries operate various system dealing with filed civil appeals. There are representative systems such as Safety Monitoring System of the Ministry of Public Administration and Security (MOPAS), Disaster Premonitory Information System of the National Emergency Management Agency (NEMA), Facilities Hazard Information System of the Ministry of Land, Transportation and Maritime Affairs (MLTM), Environmantal Monitoring System of the Ministry of Environment (ME). The purpose managing these systems is to reduce casualties and to improve safety by preventing disasters and accidents in local communities. This study suggests the method to effectively operate a safety monitoring system which fits to local situations based on the statistical analysis performed on filed complaint cases in Gangdong-gu as a sample region. The cases has been collected since 2012 through the voluntary safety monitoring activity of a specialist who had finished the Emergency and Safety maneger's master course.

• Fire Science and Engineering
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• v.33 no.2
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• pp.107-113
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• 2019

Recently, due to global warming, the trend shows an increase in number of lightning strikes which increase risk regarding industry infrastructures. Especially in case where the lightning strikes infrastructures including refinery, petorchemical plant facilities or storage tanks, it can cause power failures, electrical machine malfunction and damage which can lead to fire explosion and multiple calamities. Therefore, detailed case studies must be conducted through a systematic research regarding lightning strike accidents in order to understand its mechanism and devise preventive measures. This paper aims to study cases of explosion regarding waste water storage tanks in refineries and petrochemical plants in order to analyze its root cause and provide preventive measures for avoiding lightning related incidents.