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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of Korean Society of Hazard Mitigation
Journal Basic Information
Journal DOI :
Korean Society of Hazard Mitigation
Editor in Chief :
Moo Jong Park
Volume & Issues
Volume 15, Issue 6 - Dec 2015
Volume 15, Issue 5 - Oct 2015
Volume 15, Issue 4 - Aug 2015
Volume 15, Issue 3 - Jun 2015
Volume 15, Issue 2 - Apr 2015
Volume 15, Issue 1 - Feb 2015
Selecting the target year
Seismic Performance of Diagird Structure by FEMA P695
Lee, Yongjae ; Ryo, Jaeho ; Jung, Inyong ; Ju, Young K. ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 1~8
DOI : 10.9798/KOSHAM.2015.15.2.1
Irregular shaped tall building have been constructed around the world. Diagrid system has been used to represent the irregular shapes. Diagird system is consisted of only the brace and beam member. Therefore, diagrid system is shows a different structure performance than existing system. Many researchers have conducted a study to investigate the performance of the diagrid system. In this paper, seismic performance of diagrid structures was evaluated. First, the analysis model was designed. And analysis of diagrid model was evaluated by FEMA P695 method. FEMA P695 method is evaluate the seismic performance of diagrid structure through the CMR(Collapse Margin Ratio).
Evaluation of Punching Shear for Flat Plates Reinforced by Steel Plates
Seo, A Young ; Jo, Eunsun ; Kim, Min Sook ; Choi, Bong-Seob ; Kim, Heecheul ; Lee, Young Hak ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 9~16
DOI : 10.9798/KOSHAM.2015.15.2.9
In this paper, flat plates reinforced by plates with openings made of steel are tested and evaluated punching shear capacity. 8 specimens including non-reinforced specimens, reinforced with stirrups, GFRP plates, and steel plates are tested. Based on the test result, load-displacement curves, crack and failure mode are compared and analyzed. Test result of specimens reinforced by steel plates showed higher maximum load and larger displacement than non-reinforced specimen and specimen reinforced by stirrup. Specimens reinforced by steel plates showed similar shear capacity with specimens reinforced by GFRP plates. But crack has occurred with larger area in specimens reinforced by steel plates than specimens reinforced by GFRP plates. And compared shear strength of specimens with calculated shear strength by ACI 318-11, Eurocode 2, and BS 8110 codes. And judged availability of shear reinforcement spacing by ACI 318-11.
Analytical Study on Thermal Properties of Hollow Slab at Elevated Temperature
Choi, Hyun-Ki ; Bang, Chang-Hoon ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 17~23
DOI : 10.9798/KOSHAM.2015.15.2.17
For the actual application of hollow slabs for real structures, evaluation of fire resistance of hollow slabs is mandatory because the thermal behavior can be changed with existence of chamber. Many structural application of hollow slabs are reported under flexural and shear force. However, fire resistance of hollow slabs were not reported. In order to verify the fire resistance of hollow slabs, in this study, finite element analysis was used for verification of fire resistance of hollow slabs. Sectional thermal distribution was analyzed with transient heat transfer analysis considering the heat conduction, convection and radiation. All parameters analyzed with time dependent analysis method. Analysis results are compared with experimental data from the standard fire tests in order to get validation.
The Experiment for Performance Evaluation of Beam-Column Connections in the Modular Structures
Oh, Myoung-Ho ; Park, Sung-Jin ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 25~33
DOI : 10.9798/KOSHAM.2015.15.2.25
This paper was described to perform cyclic load tests for evaluating the performance of the light-weight beam and the rectangular steel column connections using the one-side bolts. All connections performed in the experiment were showed the strength up to 6% rad of the total rotation without the reduction of load capacity, but the stiffness and strength of the connections fell short of the rigid connection to be target capacity because the flexural deformation of the end-plate was early occurred. Thus the most critical element to be determined the performance of this connections is the thickness of end-plate. Also the new detail of connection to be additionally installed at the inner side of the light-weight beam was proposed to improve the capacity of connection.
Evaluation of the Effect of Time Lag Between Vertical and Horizontal Peak Accelerations on Seismic Responses of a Regular RC Building
Kim, Sung Jig ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 35~40
DOI : 10.9798/KOSHAM.2015.15.2.35
The paper investigates the effect of time lag between vertical and horizontal peak acceleration on seismic responses of a 12-story regular RC building. The effect of time lag on the structure is monitored by evaluating the drift ratio, fluctuation of axial force on columns and the shear capacity of RC columns through the nonlinear time history analysis. The results are then compared against the response with coincident horizontal and vertical peaks. It is observed that the arrival time interval has an important effect on the response of the selected structure, particularly for interstory drift ratio, axial force variation of columns, and shear demand of columns. It is therefore concluded that vertical motion considering time lag should be included in analysis for assessment and design.
Experimental Study on the Transfer Length in Pretensioned Prestressed Concrete Beam Using 2,400 MPa PS Strand
Yim, Hong Jae ; Kim, Jin Kook ; Yang, Jun Mo ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 41~49
DOI : 10.9798/KOSHAM.2015.15.2.41
Steel strand for prestressing (PS strand) has higher strength than any other structural steel used in infra-structures because it is used for prestressing concrete. Higher strength strand can be more effectively used in structures. Recently, newly developed 2,400 MPa PS strand is increasing its application by substituting for 1,860 MPa grade in the post-tensioned structures. However, there has not been regulation nor research on the use of 2,400 MPa strand in pretensioned prestressed concrete structures. In this study, 28 pretensioned prestressed concrete specimens were fabricated using 2,400 MPa strand. From the release test, the influence on the transfer length with respect to compressive strength of concrete, steel fiber volume ratio, reinforcement of stirrup, and pretension loading type was analyzed.
Structural Behavior Analysis of DSCT Wind Power Tower for 5MW Turbines Considering Large Displacement Effect
Han, Taek Hee ; Yi, Jin-Hak ; Yoon, Gil-Lim ; Won, Deok Hee ; Yoo, Sang Ryang ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 51~61
DOI : 10.9798/KOSHAM.2015.15.2.51
A double-skinned composite tubular (DSCT) offshore wind power tower was designed. Because a wind power turbine is heavy and a wind power tower is very slender, the actual resisting moment capacity of the tower against wind load becomes less than its original moment capacity as its lateral displacement increases. Therefore, its actual moment capacity should be found for safe design by considering large displacement effect. In this study, 40 sections of DSCT wind power towers were designed for a 5.0MW turbine and the performances of the designed 40 sections were analyzed with and without considerations of large displacement effect. In designing and analyzing them, the material nonlinearity and the confining effect of concrete were considered. The comparison of the analysis results showed the moment capacity loss of the wind power tower by the mass of the turbine is significant and the large displacement effect should be considered for the safe design of the wind power tower.
A Study on the Estimation for Width of Passageway for Improvement in the Safety and the Convenience of the Metro Stations and the Transfer Facilities
Kim, Kwangmo ; Kim, Jinho ; Shin, Minjung ; Kim, Heekyu ; Park, Yonggul ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 63~70
DOI : 10.9798/KOSHAM.2015.15.2.63
Congested situation owing to lack of metro station facility capacity has greatly intensified and repeated recently. Therefore, metro users suffer much inconvenience and large accidents due to the group walking in an emergency scare have been predicted and concerned. To suggest improved calculation method of transfer facilities PW (the width of passageway), the PW formula in the Design Guidelines and the theoretical basis of LOS (Level of Service) are reviewed. Also, the simulation of pedestrian environment and field survey for five stations are conducted. It is observed that LOS E showed the difficulty going to the average walking speed and the movement frequently to avoid the collision from the simulation results, thus LOS E offered by the guidelines needed the upward to LOS D in preparation for a large-scale disaster. It is found that the difference between the widths which is calculated based on the maximum and the minimum density of the same LOS grade is up to about 80% because the range of density values in the LOS D and LOS E is so great. Based on the results, the appropriate design factors used in calculation of the PW are provided.
Effect of Blast Local Damage on Flexural Strength of RC Beams and Blast Resistance According to Variation of Shear Rebar Placement
Lee, Jin Young ; Kim, Dan Bi ; Yuan, Tianfeng ; Yoon, Young Soo ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 71~77
DOI : 10.9798/KOSHAM.2015.15.2.71
In this study, standoff detonation tests and static beam tests on
RC beams were conducted to investigate the effect of local damages caused by blast load on the flexural strength and ductility index. Seven specimens were manufactured with variables of shear reinforcement ratio and rebar spacing. New-emulite150, emersion explosive with TNT equivalent of 1.01, was used in blast test. Local damages of specimens were evaluated by measuring crater, spall diameters and weight loss. In addition, Flexural strength and ductility index were measured by conducting the static beam tests on the damaged and undamaged specimens. In these test results, decreasing rebar spacing is the effective method to increase blast resistance when the shear reinforcement ratio is fixed.
Evaluation and Calibration Method Proposal of RCP Daily Precipitation Data
Joo, Jingul ; Kim, Sangdan ; Park, Moojong ; Kim, Jungho ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 79~91
DOI : 10.9798/KOSHAM.2015.15.2.79
This study evaluated RCP scenario's daily precipitation data from the regional climate model and proposed the calibration method of RCP data for hazard mitigation field. Three data, observed daily precipitation in 2001~2013, RCP scenario's daily precipitation in same period with observed data, and RCP scenario's daily precipitation in 2014~2100, was applied to examine the statistical characteristics of each data. As a result, it found that RCP scenario's data properly reflected climate characteristics in the Korean Peninsula for annual precipitation and monthly precipitation distribution, except number of days with precipitation overestimated. To calibrate the problem, this study proposed the method which daily precipitation less than a threshold (0.6~1.7 mm) is considered as no rain. The result after calibration has shown that calibrated RCP scenario's data properly reflected climate characteristics in the Korean Peninsula for annual average number of days with precipitation and the distribution of monthly number of days with precipitation.
Development and Assessment of Drought Damage Estimation Technique using Drought Characteristic Factors
So, Jae Min ; Shon, Kyung Hwan ; Bae, Deg Hyo ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 93~101
DOI : 10.9798/KOSHAM.2015.15.2.93
The objective of this study is to evaluate the applicability of drought damage estimation technique using the drought characteristic factors. In this study, Bivariate Joint Drought Index (BJDI) was used in order to estimate the drought characteristic factors. Actual damage costs data was collected through the government report. Damage estimation equation was derived by using the multi regression analysis for drought characteristic factors and damage costs. The comparison of actual damage costs and estimation damage costs residuals showed that the difference were ranged on -51.9~34.6 billion won. The applicability of damage estimation equation is higher under the consideration of data limits. In order to obtain the better reliable regression equation, the continuous collection of drought damage data would be required.
The Study to Estimate the Fitness of Bivariate Rainfall Frequency Analysis Considering the Interdependence Between Rainfall and Wind Speed
Park, Jae Beom ; Kal, Byung Seok ; Heo, Ju Ri ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 103~110
DOI : 10.9798/KOSHAM.2015.15.2.103
We examine the feasibility of a bivariate rainfall frequency analysis technique that is based on the copula model, taking into account the interdependence between rainfall and wind speed. Four marginal and archimedean copula model are applied for annual maximum rainfall and wind speed of six stations under Korea Meteorology Administration(KMA). Optimal copula model is identified based on RMSE(Root Mean Square Error) and AIC(Akaike Information Criterion) using an intermediate random variable. The probability rainfall is estimated by conditional copula and is compared with the result of univariate rainfall frequency analysis. Taking into account the effect of the wind speed, the probability rainfall of copula model showed increasing trend with increment of duration time and return period.
On the Spatial and Temporal Resolution to Adjust the Radar Rainfall Using the Gauge Rainfall
Yoon, Jungsoo ; Joo, Jingul ; Yoo, Chulsang ; Hwang, Seokhwan ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 111~121
DOI : 10.9798/KOSHAM.2015.15.2.111
In this study, the spatial and temporal resolution to adjust the radar rainfall using the gauge rainfall was examined. And several quantitative quality measures (ME, BS, RRBC, NSD, NSE and MSE) were used to examine the spatial and temporal resolution. As a result, RRBC and MSE among the measures well assessed the bias and the variability, respectively. When the radar bin size was 250 m, RRBC decreased from -58.4% (accumulation time of 10 min) to -41.6% (accumulation time of 360 min) as the accumulation time increased. And MSE also decreased from
(accumulation time of 10 min) to
(accumulation time of 360 min). When the accumulation time was 10min, RRBC negatively increased from -58.4% (radar bin size of 250 m) to -63.2% (radar bin size of 1,000 m) as the radar bin size increased. And MSE decreased
(radar bin size of 250 m) to
(radar bin size of 1,000 m). The correlation coefficient between the radar rain rate and gauge rain rate increased as the accumulation time and the radar bin size increased. The correlation coefficient at 30 min of accumulation time was 0.8 and it increased by nearly 30% compared to 10 min of accumulation time. The correlation coefficient with 1,000 m of radar grid size was 0.63 and it slightly increased by nearly 1.8% compared to 250 m of radar grid size. From this, it has found that the correlation coefficient was more sensitive to the temporal resolution than the spatial resolution.
Assessment of Meteorological Drought Using Cumulative Severity of Daily Standardized Precipitation Index
Kwon, Minsung ; Jun, Kyung Soo ; Hwang, Man Ha ; Kim, Tae-Woong ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 123~131
DOI : 10.9798/KOSHAM.2015.15.2.123
The study proposed new drought indices (SPI-S and
-S) though utilizing the severity of standardized precipitation index (SPI) in order to improve efficiency of stepwise drought preparedness/response and communication. This study also evaluated the availability of the SPI-S and
-S using drought records of the 2000s and their drought damages reported in the press. The results indicated that the SPI-S and
-S were more efficient than the SPI as the severity of SPI-S and
-S increases while a drought event progresses. Compared with the SPI and SPI1-S~12-S, at the time when the drought damage was reported in the press, the
-S markedly decrease the ratio to indicate 'Normal' from 51.2% to 16.0%. Drought indices using severity of SPI are very useful not only for mitigating drought damage through stepwise drought preparedness/response but also for preventing confusion caused by change of drought intensity during drought duration.
The Characteristics of the Frequency and Damage for Meteorological Disasters in Korea
Ahn, Suk-Hee ; Park, Ki-Jun ; Kim, Jeoung-Yun ; Kim, Baek-Jo ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 133~144
DOI : 10.9798/KOSHAM.2015.15.2.133
In this study, 690 meteorological disasters that are recorded on the Disaster Yearbook from NEMA (the National Emergency Management Agency) from 1979 to 2013 have been analyzed to investigate the frequency and damage and to evaluate the influence of meteorological disasters on the Korean economy. As a result, the total damage has so far reached the 28 trillion won, and 19.7 disasters has been occurred and brought 804 billion won damages on average. 41.9 percent of meteorological disasters have been occurred in the 1980s and 19.3 percent in the 2000s, but the corresponding damage cost was opposite: 11.4 percent in the 1980s and 60.6 percent in the 2000s. This result means meteorological disasters are becoming larger. 45.5 percent of the meteorological disasters have been found in summer season which is intensively affected by heavy rains and typhoons. The Disaster Yearbook from NEMA classifies the cause of meteorological disasters into 31 cases, and most of disasters are a single phenomenon (94.9%) than a complex phenomenon (5.1%). It was confirmed that the meteorological disaster trend has been changed in that heavy rain has appeared consistently every year, and the number of typhoons has been decreased compared to the 1980s. Heavy rain took the highest portion (37.8 percent) of total disasters and followed by typhoons (8.7 percent), but the amount of damages of meteorological disasters is more related to typhoons (45.6 percent) than heavy rains (35.4 percent). Both of them accounts for 81 percent of the total damage. Therefore, it is necessary to build intensive prevention measures for two phenomena. The highest loss, approximately 0.9% of GDP, was taken place in 1987. Categorically, typhoon RUSA brought 0.68 percent of GDP loss in 2002 and heavy rains caused 0.45 percent of GDP loss in 1987. This result means that if a high impact meteorological disaster occurs, the ripple effect is enormous as socioeconomic.
Study on the Effect of Base Projecting Walls of Shallow Footing on Bearing Capacity
Lee, Seunghyun ; Kim, Byoungil ; Lim, Jongseok ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 145~149
DOI : 10.9798/KOSHAM.2015.15.2.145
In order to find out the effect of base projecting walls of footing supporting soft ground on increase of bearing capacity, numerical analyses were conducted with varying the number and length of the base projecting walls and the results of the numerical analyses were compared with those of the model tests. It can be seen from the results of numerical analyses and the model tests that the bearing capacity of the footing supporting soft ground increases due to the existence of the base projecting walls and the bearing capacity increases with increase of the length of the base projecting walls. According to the results of the model tests, it can be seen that bearing capacity increases with the number of the base projecting walls of 2 to 4 and it decreases when the number of the base projecting walls of 5 whereas results of the numerical analyses show that bearing capacity was little affected by the number of the base projecting walls. It can be said from the results of the model tests and the numerical analyses that economical design of the footing with base projecting walls be accomplished for the value of unity of the ratio of the length to the spacing of the base projecting walls.
Assessement of Long Term Stability of Railway Bridge Abutment Using Geosynthetics Tube
Choi, WonIl ; Kim, JaYeon ; Cho, KookHwan ; Lee, SangCheol ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 151~158
DOI : 10.9798/KOSHAM.2015.15.2.151
Recently, as increasing railway construction, the damages of transition zone in railway are also increased. Thereafter the regulation of construction management has been tighten up in transitional zone. The transition zone in railway should be satisfied with two requirements; one is that the track support stiffness in this zone should be stiff enough comparing with concrete stiffness on abutment; the other one is that the lateral earth pressure should be small enough to the design value of active earth pressure. Compaction effort to be satisfied with tract support stiffness should be more than 95% degree of compaction. When this requirement is satisfied, the applied earth pressure is reached to the passive earth pressure which causes damages on the abutment. A construction method which is a MSW (Mechanically Stabilized Wall) using a geosynthetic, is proposed. Laboratory tests were performed to verify the MSW method and the applied repeated load is
which is 3 times larger than actual high speed train load used in design. Plate load tests were performed to measure track support stiffness and the values from the proposed method gave approximately 20% increased values than existing method. The measured lateral earth pressure from applied repeated loading test is decreased to 10~25% of existing method. Numerical analyses were performed to estimate long-term stability of the MSW method for 10 years, and the analysis results shows that the lateral earth pressure is decreased to 15% of that from existing method. The long-term stability of the MSW method is also satisfied. Therefore, the proposed MSW method can be greatly useful to solve problems in transition zone in railway abutments.
Induction Wall Influence Review by Debris Flow's Impact Force
Ro, Kyung Soo ; Jeon, Bong Joon ; Jeon, Ki Woong ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 159~164
DOI : 10.9798/KOSHAM.2015.15.2.159
Owing to a recent abnormal weather, landslide and debris flow's occurrence causes that damage of the urban increases rapidly. Therefore, when the disaster occurres, the disaster prevention method should be required. So, utilization of inactive space, such as a park, retarding basin, reservation area, the ground and parking lot when the urban forms reduces the damage of sediment disaster. It needs development of induction technology. Furthermore, it is necessary to review the induction wall influence by debris flow's impact force. This study accomplishes about induction wall influence review by debris flow's impact force. Now facilities and the technology guiding control to landslide and debris flow do not exist. In Japan training wall about reduction method from the damage of lava flow is being installed, but that kind of facilities does not exist in Korea. However, a scale and frequency of landslide and debris flow increases year after year. In the case that the urban forms near mountainous district, technical development of guide control should be needed for reducing damages from landslide and debris flow.
Risk Assessment of 2011 Debris Flow Hazard Area in Yongin City
Choi, Gou-moon ; Lee, Seung Woo ; Yune, Chan-Young ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 165~178
DOI : 10.9798/KOSHAM.2015.15.2.165
In this study, risk assessment for the debris-flow hazard which caused casualties and property loss in the area of Neungwon-ri, Yongin in July, 2011 was performed. Considering the return period of rainfall, debris flow volume was estimated. Dynamics of debris flow and impact range was also simulated by numerical approach. Based on the result of numerical analysis, impact pressure and vulnerability of building was calculated according to flow depth and velocity of debris flow. Finally risk assessment was performed based on the economic value of each building. Risk assessment showed that the longer the return period induced the high impact pressure and vulnerability regardless of a structure type. In addition, under a similar hazard situation, non-concrete frame building was more vulnerable than the reinforced concrete frame building.
A Fundamental Study on the Development of Standard Visualization Model for Disaster Information Map
Lim, Hyuntaek ; Kim, Jungmyeon ; Park, Sungyong ; Sim, Gyooseong ; Kim, Jungsoo ; Kim, Yongseong ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 179~188
DOI : 10.9798/KOSHAM.2015.15.2.179
Integrated hazard mapping is one of the major problems today. Despite the need to utilize the hazard map for disaster prevention and disaster mitigation measures, we need to recognize that there is still lack of integrated mapping facilities today. In this study, a hazard information map's utilization information and analysis were gathered and made in order to provide an integrated development plan for the resulting standard visualization model. This study is expected to contribute to disaster recovery and the amount of life and property damage due to flooding.
An Experimental Study on Evacuation Ability During Underground Space Inundation
Joo, Jaeseung ; Kim, Tai-Hoon ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 189~196
DOI : 10.9798/KOSHAM.2015.15.2.189
Underground space is more vulnerable to inundation than surface structures. Because that is characteristic of the closed space and lower than surface level. For this reason, many researchers have been making a study for the root cause analysis and the preparation measures of underground space flooding. However, most existing studies are concentrated on situation description of underground space flooding about the selection of flooding area at watershed unit and the development of inundation analytical model in underground space. And reflection of evacuation ability about the person in the face of underground space flooding has not been well established yet. Therefore, this study suggests experimental result about the evacuation ability in the underground space during flooding. Through our research, flooding prevention manual could be reestablished.
Development of Criteria for Zoning of Debris Flow Hazard Area(II) - The Comparison Between Estimated and Surveyed Values -
Kim, Kyoung-Nam ; Kim, Suk-Woo ; Jang, Su-Jin ; Lee, Kwang-Youn ; Seo, Gi-Beom ; Kim, Beom-Soo ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 197~203
DOI : 10.9798/KOSHAM.2015.15.2.197
This study was to review the previous study, that was zoning the hazard area of debris flow by using the method of setting the reference point based on topography and locational characteristics. The quantity and runout distance of debris flowing were estimated on the subject of Cheonjeon-ri landslided in 2011 and both values were compared with the data of field surveying and aerial photo interpretation. As a results, the effectiveness are on the method of the basic units in each of geology and stream order(b), the empirical method using the Erodible sediment discharge (
) and the method using the basin area and the spreading angle of debris (
). In conclusion, these methods were proved in effective because the real debris scale was in the range of the hazard area zoned previously.
Development of Management Standards for the Mitigation of Volcanic Ash Damage - Focusing on Forest Products and Forestry Facilities -
Kang, Min Suk ; Park, Sung Je ; Lee, Young Kune ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 205~210
DOI : 10.9798/KOSHAM.2015.15.2.205
Volcanic eruptions can generate a variety of serious harm. Damage caused by ash affect many areas and several fields locally. In this study, preparation for domestic influx capable Baekdu explosion of ash set the management standards for the mitigation of forestry field corresponding to the primary industries in the industrial activity. Management objective establish research method through current state of forestry research method and domestic and foreign damage case investigation. Damage typify through research method and draw a conclusion from management standard. Management object divide into forest products and forestry equipments. So management standard suggest that end user can easily use. As a result, damage control to minimizing by prompt and appropriate response through management standards when ash disaster occurred.
Study of Effective Development Direction for the Storm and Flood Damage Insurance Management System through Analysis and Gathering of Requirements
Hwang, Shinbum ; Sim, Oubae ; Kim, Taekmin ; Kim, Wonhyun ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 211~216
DOI : 10.9798/KOSHAM.2015.15.2.211
Casualties and property damage has been caused by natural disasters like typhoons and heavy rains according to global climate change. the Ministry of Public Safety and Security has paid monetary compensation for these damages by implementing Storm and Flood Damage Insurance. However, development and management of risk map and insurance management map that used to calculate insurance rates in Storm and Flood Damage Insurance is insufficient. In this study, we studied the development direction and landscape initiative(draft) of the integrated management system for development system to analysis the Storm and Flood Damage Insurance data through analysis gathering of information or requirements.
Development of Mobile-based System Supporting Post-earthquake Safety Evaluation for Buildings by Case Studies
Kim, KyungMin ; Chang, Sunghee ; Kim, Jinseon ; Lee, Junghan ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 217~224
DOI : 10.9798/KOSHAM.2015.15.2.217
When earthquakes occur, the difficulties and confusions in conducting the post-earthquake safety evaluation are expected because manpower, experiences, specialties, and so on are insufficient at local governments. In this paper, the mobile-based post-earthquake safety evaluation system for buildings is developed in order to support the task related to the post-earthquake safety evaluation at local governments. The system is composed of the application for the post-earthquake safety evaluation at fields and the program for managing the evaluation results at local emergency offices. The system designs to have the functions of automatically and efficiently conducting the task related to the post-earthquake safety evaluation and contents for education and public relations. The usefulness of the developed application is verified through the field test. The earthquake management plans at local governments using the system are also suggested.
Determining Method of Risk-Weighted Value for Applying to Individual Insurance Rate on Storm and Flood Damage
Lim, Hyuntaek ; Kim, Jungmyeon ; Lee, Chungwon ; Park, Sungyong ; Ji, Yeongu ; Kim, Yongseong ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 225~232
DOI : 10.9798/KOSHAM.2015.15.2.225
The storm and flood insurance is currently growing as a national disaster management insurance against natural disasters. In current storm and flood insurance rate system, however, weighted rates for the sources of natural disasters (flood, wind, snow etc.) are not only considered, but also single insurance rate is applied to a total of 229 cities and districts without considering regional risks. In the present study, therefore, different insurance rates according to the sources of natural disasters, reflecting regional risks, were estimated and finally reasonable weighted rates were proposed based on the estimated results.
A Study on Post Traumatic Stress Disorder, Job Stress, Depression of the Fire Fighters - Focused on Fire Fighters of the Gyeonggi-Do -
Shin, Yong Sik ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 233~239
DOI : 10.9798/KOSHAM.2015.15.2.233
The purpose of this study is to analyze post traumatic stress disorder (PTSD), job stress, and depression of fire fighters who have high risk of being revealed to PTSD due to their work. Also, it analyzes differences between job stress and symptoms of depressions according to existence of PTSD symptoms. This study looks at 5,808 fire fighters working at Gyeonggi-Do. For data collection, this study used diagnosis results by self diagnosis program which was developed and managed by Gyeonggi-Do Fire & Disaster Headquarters. As research analysis method, this study used cross tabulation analysis and chi-square test which is a statistic method for independence test. As a result, it turned out that 3.6% of all fire fighters of Gyeonggi-Do are experiencing PTSD, job stress, and depression. Also, degree of job stress and depression of the group experiencing PTSD is turned out to be relatively higher than group that do not experience PTSD.
Analysis of the Parked Automotive Fire Breaking out Late at Night
Lee, Euipyeong ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 241~248
DOI : 10.9798/KOSHAM.2015.15.2.241
5,000~6,000 automotive fires break out every year in Korea and many of them do in the parked state several hours after engine stop. The automotive fires in the parked state after engine stop can be divided into two cases: before engine stop but finding out during parking and after engine stop. This study investigated the parked automotive fire breaking out late at night 7 hours after engine stop and analyzed fire causes and their liability. This automotive fire broke out because of a short-circuit caused by contacting the wire conductor to the starting motor in the engine room with the steel bracket. Moreover, based on a fire case breaking out in the same models because of the same cause, the cause of this automotive fire could be related with design defect.
Analysis of Differences in Geomorphological Characteristics on Initiation of Landslides and Debris Flows
Kang, Sinhang ; Lee, Seung-Rae ; Nikhil, N.V. ; Park, Joon-Young ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 249~258
DOI : 10.9798/KOSHAM.2015.15.2.249
Recently, damages caused by landslides have increased due to increasing frequency of localized heavy rains. In order to prevent landslide disasters efficiently, more studies related to predicting the initiation areas of debris flows causing large scale damages are necessary. In Korea, most debris flows mobilize from landslides. The studies on the mobilization of debris flows can be classified into geotechnical based approach, geomorphological approach using local topographic properties and analytical approach based on hydrological properties. Geomorphological approach has merits including the convenience of obtaining topographical data and the applicability toward a large area. In this study, ten GIS based geomorphological data were obtained from landslides and debris flows initiation areas located in Seoul, Gyeonggi and Gangwon Provinces. A relationship analysis was conducted among the topographic parameters to study geomorphological characteristics discerning landslides and debris flows. A threshold, which can be used for the prediction of debris flow initiation areas, was proposed through the relationship analysis.
A Resonance Stability of Temporary Bridge Bearing Method Passing Underneath Existing Subway Structure
Kim, JinPal ; Park, YangHoo ; Kim, JaYeon ; Cho, KookHwan ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 259~267
DOI : 10.9798/KOSHAM.2015.15.2.259
The subway station of 930 that passes underneath Seoul subway line #2 which is the only circulation line in Seoul Metropolitan is constructed in Seoul subway line #9. In this study, the resonance phenomenon which is caused by the natural frequency of the subway line #2 structure and vibration from train operation during construction of temporary bridge is investigated. The dynamic stability of the proposed method is investigated using numerical analysis and field measurement. The results of the eigenvalue analysis evaluated from train operation speed is 164.4 km/h and ktx is 222.7 km/h. The comparisons between field measurements and numerical analysis showed a similar trend which is 80% between two, approximately. The numerical results are that resonance phenomenon of the subway will not happen under the operation speed, and also shows the resonance phenomenon at the same speed of eigenvalue analysis. It should be useful to apply for similar cases.
A Study on Feng Shui of Chosun Royal Tombs by Land Slide and Debris Flow Risk Analysis
Lee, Chang Hee ; Oh, Kyoung Doo ; Heo, Jae Young ; Oh, Kuk Ryul ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 269~275
DOI : 10.9798/KOSHAM.2015.15.2.269
Our ancestors decided what places were safe by feng shui in order to prepare for natural disasters. Especially in the case of decision of royal tombs, feng shui only had been used to secure the fate of the country. This study aims to analyze land slide and debris flow risk with modern technique in the area of Donggureung where Chosun royal tombs are and in the area of Umyeon Mountain where much damage occurred in 2011. And this study also explores an aspect of feng shui science. This study shows that disaster prevention facilities around the royal tombs secured safty against natural disasters in conjuntion with feng shui. As climate change brings in more and more debris flow risk, this study expects the wisdom of our ancestors will help us to choose more safe place.
Estimating Hydrodynamic Characteristics of Sediment Exclusion Labyrinth Weir Using 3D Numerical Analysis
Kim, Sooyoung ; Ryu, Kwang Hyun ; Kim, Hong Taek ; Lee, Seung Oh ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 277~283
DOI : 10.9798/KOSHAM.2015.15.2.277
Labyrinth weir was improved structures of existing linear Dam. The improved structures made by arranging triangle, rectangle or trapezoid, etc. repeatedly to increase the overflow discharge. Labyrinth weir remarkable not only increase overflow discharge but also energy dissipation and aeration effect. However, weakness of sediment deposition still existed in upstream of weir. If the severance of sediment transport occurred, it was possible to cause the ecological disturbance by affecting the ecosystem in downstream of weir. In this study, Slope type and Reverse-wedge hole type were changed from ordinary trapezoid labyrinth weir(Normal type). Using velocity distributions and turbulence characteristics due to changed shapes, the cause of the increase of sediment exclusion efficiency was examined. The upstream boundary condition(BC) was set to steady water surface elevation and the downstream BC was set to outflow. After steady flow, generating sediment particle at upstream BC and the sediment exclusion efficiency was estimated by counting remained sediment particles in upstream of weir. As a result, sediment exclusion efficiency increased 10.1 times for Slope type and 5.6 times for Reverse-wedge hole type compared with Normal type. And the hydrodynamic characteristics inside weir was analyzed. The increase of bottom velocity made sediment exclusion efficiency increase for Slope type and the increase of swirling strength near walls help sediment to exclude for Reverse-wedge hole type. In the case of the sediment exclusion labyrinth weir, the sediment continuity can be to enhance by changing shape simply. And it will be expected that it have the greater availability because there is an positive role in improving ecosystem health.
Establishing Indicators and Stream Depletion Potential Index (SDPI) for Stream Health
Park, Jin Won ; Cho, Yong-Sik ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 285~292
DOI : 10.9798/KOSHAM.2015.15.2.285
Recently, stream depletion has been accelerated due to drought occurred by abnormal climate, increase of water demand and decrease of long-term run off by urbanization. In this study, a methodology for indexing was applied to 115 medium influence areas and characteristics of drying stream was analyzed using GIS. Stream depletion indicators are composed of rainfall (rainfall, maximum consecutive dry days), basin area, river water intake, recycled water, long-term run off (underground water intake, land use), dam supplying channel flow for maintenance. Indicators for underground water intake and land use distinctly have regional difference while indicators for river water intake and dam supplying channel flow for maintenance lose distinction because they have low regional variations in area without localized area. Six indicators composed of eight factors used normalized value by using z-score method. Stream depletion potential index involving six indicators is calculated and map was made for grasping possibility of stream depletion deepen. Then, qualitative analysis was performed for stream depletion in this study. The index would be practical for maintenance and management of river by leading to provide not countermeasure but preventive policy.
Development of a Levee Stability Assessment Technique Using Multispectral Orthoimages and LiDAR Data
Choung, Yunjae ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 293~299
DOI : 10.9798/KOSHAM.2015.15.2.293
Assessment of levee stability is essential for measuring levee failure risks. This research aims to develop a levee stability assessment technique using the multispectral orthoimage and the LiDAR data acquired in the Nakdong River Basins. First, the multiple levee components including the levee crowns, the major materials and the eroded areas on levee surfaces are detected using the given LiDAR data and the multispectral orthoimages. Next the three types of the levee failure risks (risk of overtopping, risk of levee crown failures, and risk of levee slope failures) are separately assessed on levee surfaces in the constant intervals. Using the sum of the risk types detected in the intervals, the level of levee failure risk (safe, low, middle and high) is determined and the crown segments with the different colors (red, yellow, blue and green) are shown to indicate the level of levee failure risk in the intervals. The developed technique is employed to assess the failure risk of the three levees located in the Nakdong River Basins, and the results shows that the levees with the paved surface have the relatively low risk of levee failures, while the levees with the unpaved surface have the relatively high risk of levee failures.
Quantification of Tree Root Depth for Basin-Scale Sediment Yield Simulation
Yoo, Chulsang ; Kim, Keewook ; Park, Chang-Yeol ; Bae, Deghyo ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 301~311
DOI : 10.9798/KOSHAM.2015.15.2.301
This study quantified the tree root depth, an important factor in the simulation of basin-scale sediment yield. The data used in this study were those measured in the area of landslide due to heavy rainfall around July and August, 2006. These field survey data was quantified the relationship between slope and tree root depth using a probability density function (pdf). The tree root depth in this study considers both the gravitational direction and perpendicular direction to the plane. Finally, a methodology to generate tree root depth data using the pdf decided. As results, the two parameter gamma distribution was selected and found to well represent the tree root depth data. However, one should consider the number of data available or other geomorphological conditions to decide if the quantification of tree root depth is with respect to the gravitational direction or perpendicular direction to the plane. The results in this study may be used effectively for the estimation of tree root depth in the basin-scale sediment yield.
A Study on Vegetational Indicator and Criteria for Assessment of Stream Condition
Chun, Seunghoon ; Kim, Wooram ; Kim, Chaebaek ; Chae, Sookwon ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 313~325
DOI : 10.9798/KOSHAM.2015.15.2.313
Actual vegetation plays a key role in stream habitat as well as a continuous physical structure of stream condition. Therefore, it is currently in need of a research regarding both scientific and systematic assessment technique to diagnose and to assess the vegetation. This research was studied to suggest an vegetational assessment indicator and criterion in physiognomic level, including both application of hierarchial system for assessment-unit and data use of high resolution images to correspond the integrated objective of stream environment management overcoming the limitation of the previous assessment system. The vegetational assessment indicator this study developed consists 1) an index of vegetation heterogeneity to quantify the vertical structure of physiognomic vegetation patch of trees, shrubs, and herbaceous plants, 2) an index of vegetation diversity, focused on dominant species in the uppermost layer to figure out the horizontal structure, and 3) an index of vegetation naturalness to assess the anthropogenic disturbance of the same vegetation patch mentioned earlier. It was proved that the vegetational assessment indicator of this study, when it was applied to the experimental stream, was capable to sufficiently reflect the contemporary status of the stream condition; and also the assessment indicator was proved to be both rapid and scientific assessment system, based on analysis of high resolution images. However, it was found that to set quantitative criterion due to the application of the assessment indicator is to reflect features of each stream segments accurately; therefore this should be verified in further studies through application of several experimental streams in broad region.
A Study for Double Pipe Type Intake Pipe in Seawater Intake Facility(I): Experimental Modeling Test
Park, Youngin ; Kim, Jiho ; Lim, Ingyu ; Kim, Taewon ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 327~332
DOI : 10.9798/KOSHAM.2015.15.2.327
The current small and medium seawater intake facilities have significant problems due to suspended solids, unstable intake and maintenance, etc. A double pipe structure and underground type seawater intake system is being developed to overcome the existing weaknesses and an experimental model test was conducted to verify the proper intake discharge for the double pipe type intake pipe. In order to examine the design parameter of the intake pipe, we have examined the intake discharge according to the length of intake pipe, perforated ratio and water depth change using the experimental modeling test with/without the intake pump. From the result of experiment for the forced water intake with the intake pump, the intake discharge was not sensitive to with/without filtered sand layer and length of intake pipe. The double type intake pipe did not decrease the intake efficiency. Therefore, when the length of the double pipe type intake pipe model was about 1m(prototype 10m), it was possible to take the intake discharge supply without degradation in the water intake efficiency. In the pressure head without the intake pump, the intake discharge was affected by water depth as the length of intake pipe is short and the perforated ratio is low. From the results, the length of intake pipe must be design more than minimum of 1 m(prototype 10 m). In order to secure stable intake discharge, the perforated ratio must be established more than 359%.
A Study for Double Pipe Type Intake Pipe in Seawater Intake Facility(II): Numerical Modeling Test
Kim, Taewon ; Kim, Seonghwan ; Kim, Jiho ; Park, Youngin ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 333~339
DOI : 10.9798/KOSHAM.2015.15.2.333
Small-and medium seawater intake facilities are being used currently. However, the design parameter of the double pipe type intake pipe is not standardized in Korea. In this study, we have examined the design parameter as the analysis for the flow phenomenon and intake discharge in the intake pipe using Computational Fluid Dynamics (CFD). From the results of the numerical simulation for the 5 m, 10 m and 20 m length of intake pipe, respectively, when the length of intake pipe is at least 10.0m, the velocity in the intake pipe is uniformly distributed. In order to secure stable flow in the intake pipe, the length of intake pipe is needed to be more than 10 m. From the results of the numerical simulation for the intake discharge per the perforated, velocity vector, streamline and standard deviation according the perforated ratio, the ratio must be established more than 353%. The advantage of the ratio come from the equal pressure distribution and stable flow. The results of numerical simulation were similar to the results of 359% ratio of the experimental modeling test.
Future Changes of Stream Flow and Water Quality in the Byongseong Stream Watershed under Multiple Future Climate Scenarios
Park, Yoonkyung ; Lee, Jeonghoon ; Choi, Daegyu ; Kim, Sangdan ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 341~351
DOI : 10.9798/KOSHAM.2015.15.2.341
This study attempts to grasp future changes in watershed scale stream flow and water quality using the future climate data from four general circulation models (GCMs). To this end, stream flow and water quality data (suspended solid and total nitrogen) were expressed as functions of precipitation and temperature to establish the relationships between those values and the future climate data for the watershed. This data was calculated through a bias correction method and was then substituted into functions that predict future stream flow and water qualities. A total of four GCMs including CNCM3, CSMK3, CGHR and MPEH5 were used, each of them included A2, A1B and B1 SRES scenarios, for a total of 12 scenarios reviewed. The future precipitation and temperature of A2 scenario showed the greatest increase. Temperature had shown an increasing trend that became more prominent in the far future, while precipitation increased in average amounts but with large deviations. Although future stream flow and water quality was increased in most of the scenarios compared to those of the present, the variability was shown to be much smaller than the present. MPEH5 and CGHR showed large increases in future stream flow and water quality, while CSMK3 and CNCM3 showed smaller. The changes were reviewed by period, and the results showed similar or slightly decreased flow and water qualities values compared to the present for 2011 to 2040, decreased values for 2041 to 2070 and increased values for 2071 to 2100. There were also large differences in future predictions among the scenarios, although it could be identified that most of the future scenarios had trends similar to the SRES scenarios.
A Study on Design Method and Effect Analysis of Rainwater Harvesting Facility for Efficient Use
Kang, Taeuk ; Koo, Youngmin ; Lee, Sangjin ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 353~361
DOI : 10.9798/KOSHAM.2015.15.2.353
Recently, interest in harvesting and reusing rainwater is increasing to effectively control stormwater and secure alternative water resources in Seoul, Suwon, Jeju-do, and so on in Republic of Korea. However, domestic law system and technical guideline are not enough to practise the rainwater harvesting facility because those were just established for regulating reduction of runoff without actual plan of rainwater reuse. The purpose of the study is to suggest a useful design method for rainwater harvesting facility by considering demand (water consumption) and supply (annual rainfall amount and pattern) for rainwater reuse with the SWMM (storm water management model). The SWMM is not only able to design of rainwater harvesting facility but also can simulate watershed runoff and water quality analysis. Therefore, the SWMM has advantages to evaluate flood control ability and removal effect of nonpoint source pollution by rainwater harvesting facility. The design method proposed in the study applied to determination of rainwater harvesting facilities in Songsan Green City and the effects were analyzed quantitatively.
Estimation of Bio retention Design Capacity Using Principal of Diminishing Returns
Park, Myungwoo ; Lee, Jeonghoon ; Park, Baekyung ; Kim, Sangdan ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 363~368
DOI : 10.9798/KOSHAM.2015.15.2.363
In this study, a methodology determining the design capacity for a bio-retention which is one of non-point pollutant sources control facilities based on LID concept is proposed. Since bio-retentions are small-scale facility and are applied to the treated catchment of the small area, the stormwater routing through a bio-retention is simulated using a simple water balance model linked with the NRCS-CN method. Based on recent 10-year meteorological data and catchment characteristics, a stormwater capture curve is constructed using computing results from stormwater amounts intercepted by bio-retentions with various capacities. Using the principal of diminishing returns which is usually applied to economics, the design capacity of a bio-retention is determined from the stormwater capture curve. As a result, it is shown that the design capacity is about 7.3 mm for the study treated catchment. Finally, a sensitivity analysis is performed to investigate the design capacity change due to the impervious rate.
Study for Estimation of Optimal Soil Layer Depth according to the Evaluation of Green Roof Hydrological Performance
Lee, Jeonghoon ; Yoon, Jaeyoung ; Min, Kyungsok ; Kim, Sangdan ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 369~375
DOI : 10.9798/KOSHAM.2015.15.2.369
In this study, the simple model of green roof is developed and its hydrological performance with respect to soil layer depth is performed for study area. And optimal soil layer depth based on results of performance was estimated. The results of model show that 85% green roofs can capture 0.55~0.96 of runoff and reduce 1.7~36.2% of the peak runoff in the usual design criteria of 3~20 cm soil layer depth. Pollutant removal efficiency in BOD can be expected to be 37~49%. Soil layer depth is optimized as the value of 8.1 cm using the law of diminishing returns in the sense of non-point sources pollutant reduction efficiency.
A Study of Climate Change Patterns of Korea Through the Standardization and Composite Impact Analysis of the Long-term Weather Data
Kal, Byung Seok ; Lee, Na Eun ; Park, Jae Beom ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 377~383
DOI : 10.9798/KOSHAM.2015.15.2.377
In this study, 61 local meteorological station data elements by weather disasters over the past 30-year period subject to rainfall, wind and snow, regional variations were analyzed using the normalization method. Also rainfall-Wind, snowfall-wind continued to analyze the complex nature of the maximum hourly and analyzed. The analysis results, In the case of regional characteristics Rainfall and snowfall has been increased in the West coast and the Honam region showed a tendency to increase the wind from the west coast and the island. Complex nature of the rainfall and wind was shown in Gangwon Province, on the south coast region typhoon moving path when the snow and wind do not have a clear characteristics were analyzed by non-wind side effect greater action to snow.
Examination of the Possibility of Applying SMI Method to Estimate Long-term Surface Runoff
Park, Myungwoo ; Park, Yoonkyung ; Ahn, Mijin ; Kim, Sangdan ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 385~391
DOI : 10.9798/KOSHAM.2015.15.2.385
The possibility of applying SMI method to estimate long-term surface runoff is investigated in this study. The parameter of SMI method can be estimated for Korean 6 Dam watersheds which have long-term runoff data. Compared to long-term surface runoff using NRCS-CN method, it is shown that long-term surface runoff can be obtained more realistically using SMI method. In addition, it is recommended to use 0.6 as the value of the SMI parameter when applied to ungauged watersheds.
A Study on Mitigation Measure by Classification of Areas based on Risk Factors of Snowfall
Koo, Youseong ; Lee, Sungho ; Lee, Dalbyul ; Jung, Juchul ;
Journal of Korean Society of Hazard Mitigation, volume 15, issue 2, 2015, Pages 393~398
DOI : 10.9798/KOSHAM.2015.15.2.393
Recently, Busan Metropolitan City has experienced unexpected snow damage and there is a growing need for mitigation measures to snow damage. This paper classifies Dongs(administrative divisions of South Korea) in the study area based on damage due to snow on the road. The method of this study is as follows: First, it carries out principal component analysis using variables related to damage due to snow on the road. Second, it conducts cluster analysis to classify Dongs in Busan Metropolitan City. Finally, it proposes differential measures for each Dongs for Snow Damage mitigation based on Snow Risk Factors.