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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 16, Issue 4 - Aug 2016
Volume 16, Issue 3 - Jun 2016
Volume 16, Issue 2 - Apr 2016
Volume 16, Issue 1 - Feb 2016
Selecting the target year
Effects of Repaired Thickness and Method on Adhesion Performance of Silicone Polymer Structural Sealant
Jang, Seokjoon ; Yun, Yeonjun ; Won, Jonghyeon ; Yun, Hyundo ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 1, 2016, Pages 1~7
DOI : 10.9798/KOSHAM.2016.16.1.1
This paper describes the adhesion performance of silicone polymer structural sealant in aluminum curtain wall system. There is marked contrast between standard details and actual details of structural sealant in south Korea. Therefore, this paper explores the capacity of actual detail and repaired system. Test variables included the construction of norton tape and boundary sealant, repaired method and thickness of sealant. The one-way laminated glass panels were supported on two sides and subjected lateral load for condition of wind load applied. The test results indicated that norton tape affects the stiffness and strength of connection between glass and aluminum frame. On the other hand, the boundary sealant affects the ductility of that. There is are no significant effects of sealant thickness and repaired method on strength of connection, and observed the difference between measured capacity of specimens and design capacity of those. Therefore, the proposed reduction ratio based on measured results to reflect the actual construction details.
Comparison of Design Provisions on Shear Capacity for Wide Beams Reinforced Openings
Kim, Heecheul ; Kim, Min Sook ; Ko, Myung Joon ; Park, Jong Yil ; Lee, Young Hak ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 1, 2016, Pages 9~16
DOI : 10.9798/KOSHAM.2016.16.1.9
In this paper, shear capacity of wide beam reinforced with steel plate with openings was evaluated. Three non-shear reinforced specimens and eight shear reinforced specimens were tested. Test results were compared with shear equations provided from the design provisions, KCI-12 and CS0A A23.3-04. Effective depth of beam, transverse spacing of shear reinforcement and width of support were considered as variables. Test results showed that the shear strength increased as the transverse spacing of shear reinforcements decreased while shear strength decreased as the width of support decreased.
A Study on the Disaster Response Function for Eup, Myeon, Dong Government Office Buildings
Kim, Jin-wook ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 1, 2016, Pages 17~22
DOI : 10.9798/KOSHAM.2016.16.1.17
Eup, Myeon, Dong are terminal administration units in Korea. Since 2000 administrative role of Eup, Myeon, Dong was changed from administrative service to supporting citizen autonomy and community welfare. Size of government office building was changed for supporting additional functions. This study suggested that Eup, Myeon, Dong government building could be used as a disaster emergency response center structure. Data of 20 Eup, Myeon, Dong community centers were corrected and analyzed. Through analysis, 85% of building include space for office of reserve forces and 95% of building have lecture rooms and 85% of building have multi purpose space. These could be used as office/clerical space for response personnel. It will be helpful to increase satisfaction ratio of Dong Government Office. As a conclusion, design of Eup, Myeon, Dong Government Office should include disaster response function from now on.
Analytical Study on Steel Plate Reinforcement Effect at Beam-Column Joints in Reinforced Concrete Frame
Yang, Yang ; Oh, Keunyeong ; Hong, Sungbin ; So, Jaehyuk ; Lee, Kangmin ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 1, 2016, Pages 23~28
DOI : 10.9798/KOSHAM.2016.16.1.23
This paper analyzed the reinforcement effect of concrete beam-to-column joints bonded with steel plate in reinforced concrete structures using finite element program. The limit load, ductility, and cracks of unreinforced model and reinforced model by steel plates were evaluated based on the analytical variations of reinforced steel plate area and thickness. As a result of analytical study, the maximum load of reinforced model by steel plate has 63% to 97.5% against unreinforced model. Also, to increase steel plate thickness has better performance than when steel plate area increases.
Dynamic Analysis of Lego Block System for the Road Recovery
Lim, Sun Woo ; Kim, Jeong Hun ; Lee, Chang Soo ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 1, 2016, Pages 29~35
DOI : 10.9798/KOSHAM.2016.16.1.29
Lego block system forms a temporary pavement area using the assembled structure block in the road excavation work for the maintenance and installation of facilities. This system was developed for a safe passage of vehicles and pedestrians. The concept and function of lego block system developed for the road recovery of an advanced country type were established by this study. The dynamic behavior was investigated by dynamic finite element analysis subjected to moving load considering real vehicle loads. Also, both the compaction effect of the ground caused the maximum vertical displacement and dynamic structural safety caused the upward displacement were evaluated by dynamic analysis results. As a result, lego block system showed the excellent compaction effect of the ground. Although the maximum upward displacement in lego block system was occurred by vehicle loads, safety of this system is fully satisfied.
Usefulness of Precipitable Water for Improvement of the Accuracy of Rainfall Occurrence Decision by Radar Data
Kang, Minseok ; Ku, Jung Mo ; Yoo, Chulsang ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 1, 2016, Pages 37~50
DOI : 10.9798/KOSHAM.2016.16.1.37
This study evaluated the accuracy of using the radar data to determine the rainfall occurrence, also the possibility of using the precipitable water as a role to improve the accuracy. To evaluate the role of precipitable water, the occurrence probability of rainfall was derived and evaluated. Also, how the precipitable water could improve the accuracy of rain/no rain decision was evaluated. In this study, Both the Gwanaksan radar data and 28 AWS within the radar umbrella were analyzed. The precipitable water data were derived by using the Osan and Baengnyeongdo aerological station data. The results are as follows: (1) When using the 1.5 km CAPPI data and PPI data, the matching probability of rainfall occurrence was calculated about 30% and the matching probability of no rainfall occurrence was calculated about 95%. (2) The precipitable water was found to improve the radar accuracy on rain/no rain decision by about 4% (monthly maximum: 8%). (3) This result was similarly calculated when using the 1.5 km CAPPI data and PPI data. (4) Precipitable water has a role of threshold that transform rain into no rain during the dry season and transform no rain into rain during the wet season.
Development of Basin-scale PMP Estimation Method by considering Spatio-temporal Characteristics
Kim, Youngkyu ; Kim, Yeonsu ; Yu, Wansik ; Oh, Sungryul ; Jung, Kwansue ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 1, 2016, Pages 51~61
DOI : 10.9798/KOSHAM.2016.16.1.51
This study aims to develop a PMP estimation method in a basin-scale by considering both temporal and spatial characteristics and to compare the existing PMP estimation method with the developed method in this study. The existing study was performed using the rainfall data within the areal range rainfall events observed in the whole Korean Peninsula with exceeding 130 mm rainfall. Meanwhile, the rainfall data utilized for the new PMP estimation method was determined after selecting the targeted watershed. The new PMP estimation method proposed in the current study is to (1) the DAD analysis was performed using the grid-based rainfall search algorithm. (2) the PMP was estimated by multiplying the maximizing rate of heavy rainfall with the analyzed DAD. PMP using the new estimation method was compared with the exiting PMP as well as the areal maximum probable precipitation. As a result, even though the new estimate is lower than the exiting PMP, it was larger than the areal maximum probable precipitation (200-Year 48-Hour Areal Rainfall Frequency). Therefore, through further study, it is expected to utilize the design flood estimation.
Evaluation of Land Surface Models: Focused on Andong and Yongdam Dam Basins
Cho, Hyungon ; Lim, Yoon-Jin ; Kim, Baek-Jo ; Kim, Gwangseob ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 1, 2016, Pages 63~71
DOI : 10.9798/KOSHAM.2016.16.1.63
The regional impacts of climate change have caused more frequent and severe extreme hydrologic events such as droughts and floods. The better understanding of the hydrologic circulation related atmosphere, hydrosphere, and geosphere, and the application of suitable land-atmosphere models are essential to analyze the regional impacts of climate change. In this study, DHSVM and TOPLATS model are applied to the Yongdam and Andongdam basins which have flux tower data for 2013 year. In this study, RMSE,
, MSRE methods are used to evaluate the models. Comparisons of model results and observation data of net radiation, sensible heat, latent heat, ground heat, evapotraspiration, and soil moisture demonstrated that overall performance of test statistics of DHSVM is better than that of TOPLATS.
A Study on the Changes of Design Flood Quantiles based on Rainfall Quantile Estimation Methods in Han River Basin
Kim, Sunghun ; Shin, Hongjoon ; Kim, Teareem ; Kim, Hanbeen ; Heo, Jun-Haeng ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 1, 2016, Pages 73~82
DOI : 10.9798/KOSHAM.2016.16.1.73
In this study, the changes of design flood quantiles were assessed based on several rainfall quantile estimation techniques in Han River basin. For this purpose, stationary at-site frequency analysis (S_AS), stationary regional frequency analysis (S_RFA), and nonstationary at-site frequency analysis (NS_AS) were employed for estimating rainfall quantiles. For real application, the rainfall quantiles were estimated for the selected 56 rainfall gauges in Han River basin using the applied frequency analyses. And trend analysis such as the Mann_Kendall test was perform for 56 sites to apply NS_AS, then nonstationary Gumbel model was applied to the sites with trend. As rainfall-runoff model, HEC-1 model was applied to estimate flood quantiles at the selected 10 sites using the estimated rainfall quantiles. The estimated flood quantiles were compared with the published Flood Control Mast Plan for Han River basin (MOLTMA, 2008). As the results, the estimated flood quantiles using recent rainfall data are decreased regardless of the applied rainfall quantile estimation techniques. And if is found that design flood quantile based on S_RFA shows the smallest change among the applied methods because that regional frequency analysis is usually less sensitive than at-site frequency analysis with data change.
Seasonal Drought Damage Prediction Method Based On the Climate Forecasting Data in Geum River Basin
Jun, Hwandon ; Kim, Soojun ; Choi, Si Jung ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 1, 2016, Pages 83~92
DOI : 10.9798/KOSHAM.2016.16.1.83
There has been a very serious drought since June 2015 in Korea. This study seeks to quantify the ongoing water deficit in the first half of 2016 in the Geum river basin, which has been the most effected by severe drought in Korea. Weather time series were generated from the climate forecast results of the GFDL GCM that is a part of IRI Monthly Multi-model ensemble (MME) seasonal prediction system. Natural discharge was estimated in 14 subbasins using a rainfall-runoff model. A water balance model was built and used to predict the amount of water deficit in the first half of 2016 given the initial conditions in December 2015. Under the scenario predicted by the GCM, more precipitation than nornal is expected and consequently, water supplies in the basin will be sufficient to meet water demands. However, if only 75% or 50% of expected precipitation occurs, water supply will be inadequate to meet the water demands in spite of considering the regional supply water.
Reservoir Operations of Hapcheon Dam Applying a Discrete Hedging Rule and Ensemble Streamflow Prediction to Cope With Droughts
Jin, Youngkyu ; Jung, Taehun ; Lee, Sangho ; Kang, Shinuk ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 1, 2016, Pages 93~101
DOI : 10.9798/KOSHAM.2016.16.1.93
Practical reservoir operation preparing for droughts needs an appropriate reservoir operating rule and a prediction of future inflow. A reservoir operation method studied in this research includes a derivation of discrete hedging rule applying a linear programming, an ensemble stremflow prediction, and reservoir simulations observing the derived heding rule. The hedging phases consist of concern, caution, alert, and severe. Dam operators supply water based on the available water and the phase in which the available water is. Available water of a reservoir is defined by the current storage plus the inflow volume of the future time period. The future inflow volume was computed by ensemble streamflow prediction using historical weather condition scenarios and precipitation forecast. The tank model with soil moisture structure was used to simulate ensemble streamflow. Reservoir operations of Hapcheon Dam, Korea were simulated applying the derived hedging rule curves and ensemble streamflow predictions. The results showed the reduction of maximum and overall water supply deficit. The derived hedging rule curves are certainly worth practical reservoir operation for water supply, because they can be easily understood by dam operators under the proper future inflow forecasting such as the ensemble streamflow prediction.
A Study on Human Damage due to Heat Wave by Region
Park, Jae Eun ; Heo, Bo Young ; Sunwoo, Young ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 1, 2016, Pages 103~109
DOI : 10.9798/KOSHAM.2016.16.1.103
With the global temperature rises, South Korea frequently experiences heat wave, tropical nights and abnormal high temperature phenomena. Impacts of such heat wave, even if at the same intensity, can vary according to individuals' adaption to heat wave and regional climate characteristics. This study thus aims to examine the impacts on regional heat-wave frequency on heat-related disease deaths, and to propose heat-wave reduction measures for the minimization of heat wave damage. Various domestic and overseas heat-wave criteria and regional heat-wave criteria were examined. Based on the domestic heat wave criteria, guidelines for watch and warning over heat wave, the regional heat wave occurrence frequency was analyzed, and the correlation between the frequency, and heat-wave-affected deaths, and death rates was analyzed. Regional heat wave occurrence days and heat-wave-affected death rates were analyzed, revealing that regions with more occurrences of heat wave had a high heat-wave-affected death rate (about 76%), and that even regions with a low correlation between heat wave and death rate had a death rate of about 24%. In addition, heat wave reduction measures to minimize such heat wave damage were proposed, and a need to prepare differentiated heat wave countermeasures considering the aforementioned regional characteristics was indicated.
An Analysis of Fire Risk in Cheongju City
Yeon, Gyung-Hwan ; Lee, Jeong-Su ; Hwang, Hee-Yun ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 1, 2016, Pages 111~123
DOI : 10.9798/KOSHAM.2016.16.1.111
The aim of this study is to reduce casualties and property damage within the city that are related to fire. As Cheongju City was reborn as the integrated Cheongju City in July 2014, there was the need to create a comprehensive fire hazard map. The results of the study revealed that the outbreak of fire within the city makes a cluster pattern shaped like a bunch of grapes, and the physical properties of space for each administrative district, such as population, household, buildings, and companies, have a strong correlation with the outbreak of fire. The results of calculating fire probability by using a Poisson distribution and creating fire hazard prediction maps by utilizing risk matrix have shown that the probability of the outbreak of fire was very high in the downtown, making a circular shape, while the probability of causalities and property damage was high in the sub-center and outskirts of the city, making a belt shape.
Research on Emergency Response Plans for Flood in a Multi-purpose Tunnel
Kim, Jung hwan ; Kwon, Soon ho ; Chung, Gunhui ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 1, 2016, Pages 125~129
DOI : 10.9798/KOSHAM.2016.16.1.125
Recently, domestic and external interest in regard to become underground of traffic tunnel is heightened due to the urbanization get at saturated network of roads. In addition, due to develop urban areas flood have occurred frequently, canal tunnel's development to prevent the flood by bypassing flood discharge about flood-prone area is required. In this study, emergency response plans in the multipurpose tunnels were investigated from the related government report, websites, and previous researches. The investigated emergency response plans to cope with the natural disasters including flooding were compared to the South Korean's cases. As a result, the problem of the water canal were explained and the disaster response policies were proposed based on the necessity of the consistency and sustainability for the disaster industry.
Classification Criteria of Urban Basin for Medium and Small Stream using Characteristics of Land Use: Focus on Gimhae-si
Song, Youngseok ; Song, Yangho ; Lee, Jungho ; Park, Moojong ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 1, 2016, Pages 131~139
DOI : 10.9798/KOSHAM.2016.16.1.131
Recently, Flood damage in river is mainly occurring in medium and small streams. In case of national river or large scale local rivers, disaster management such as river improvements were established. Whereas, In case of medium and small stream, disaster management for flood damage is insufficient. Among medium and small streams of the streams passing urban areas if flood damage occur, the focus of management is required to large scale damage of human and infrastructure. In this study, it proposed selection criteria of medium and small streams that flood damage is recently increased and medium and small streams that passes through the urban area that classification criteria of urban basin proposes using impervious area.
A Study on the WBI System Development for DRR Technology & Information Sharing by ISD Method
Jung, YounHong ; Kim, Il ; Lee, YoungJai ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 1, 2016, Pages 141~150
DOI : 10.9798/KOSHAM.2016.16.1.141
Natural disasters occur repeatedly due to unusual weather phenomena, and their formations are complex enough cause catastrophic damage. In these circumstances, acquiring adequate and timely information and technology is considered significant. An important measure is education-training, which is one of non-structural countermeasures against disasters being highlighted. In the field of education, fostering higher performance in problem solving is required and specifically constructivism, case-based learning and problem-based learning are being highlighted. The rapid development of information technology gave birth to the concept of Web 3.0, and this concept is translated into 'Government 3.0,' where the focus is on the opening, sharing, communicating, cooperating, and personalizing ICT-based information within the government. This study has collected the problem-solving cases in order to develop DRR WBI system for case-based learning, which is a global disaster prevention educational system applying the ISD method relative to educational technology. The system developed in this study has been installed on 'http://www.pr4gdm.org' website.
Methodology for Simulation based Construction Safety Risk Assessment
Lee, Hyung Guk ; Lim, Tae Kyung ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 1, 2016, Pages 151~157
DOI : 10.9798/KOSHAM.2016.16.1.151
Existing research on construction productivity prediction model using simulation techniques have excluded accident events causing considerable delays. The paper presents a methodology for developing accident-event integrated construction operation models by applying Discrete Event Simulation (DES) and quantifying the safety risk associated with the operation. To achieve the goal, the study addresses following issues : first, presenting methods for identifying work tasks involved in an operation, estimating the number of work iterations and dealing with accident related variables; second, presenting an approach to model accident events realistically for simulation experiments; lastly, conducting case study on 'formwork operations for girders' and suggesting on how to effectively apply the methodology into the safety management practices.
Necessity of Disaster Impact Assessment through Analysis of Flood Control Effectiveness on Basins
Jung, Dojoon ; Kim, Yuntae ; Oh, Keumho ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 1, 2016, Pages 159~168
DOI : 10.9798/KOSHAM.2016.16.1.159
This paper shows the effectiveness of flood control by Disaster Impact Assessment Program. In order to prove the usefulness of flood control, this study analyzes the impact of flood control on the area where Disaster Impact Assessment Program had been already applied. The analysis for flood control effectiveness for the development of the area before and after is performed. Also, this study produces the results of the analysis which can point out the problem caused by inspection of following-up control and acceptance of the review in Pre-Disaster Impact Investigation Consultation Program. The results represent flood elevations get lower when the disaster prevention facility was constructed after development than before development because flood runoff was reduced by the disaster prevention facilities. This result means the regulation enforcing construction of disaster prevention facilities in development area is more effective on flood control than the authorization of the empowerment for land-users.
Experimental Study on Column-Foundation Connection of Composite Hollow RC Column
Won, Deokhee ; Lee, Jeong-Hwa ; Meng, Ling-Ying ; Kang, Young-Jong ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 1, 2016, Pages 169~178
DOI : 10.9798/KOSHAM.2016.16.1.169
The main reinforcements of reinforced concrete(RC) column are connected to the reinforcement of footing as column-footing connection. On the other hand, it is important to connect with inner tube to reinforce the connection of composite hollow RC column and footing, because inner tube is located at hollow section. In this paper, two connection methods of welding coupler connection method and anchor bolting method were proposed for the connection of composite hollow RC column-footing in addition to penetrated connection method proposed by previous researchers. To evaluate performance such as strength, ductility and behavior of the connections, finite element analysis and experimental tests were performed. Finally, it was found that the welding coupler connection method are suitable for the column-footing connection.
Safety and Reliability Analysis of Water Distribution System Considering Pressure Surge
Kwon, Hyuk Jae ; Yoo, Min Kyu ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 1, 2016, Pages 179~186
DOI : 10.9798/KOSHAM.2016.16.1.179
In this study, the weakest pipes and areas in Ho Chi Minh small block water distribution system and 4 pipes of wide waterworks system have been estimated by the unsteady analysis and reliability analysis. Probability of pipe breakage of Ho Chi Minh small block water distribution system and 4 pipes of wide waterworks system was calculated by a reliability model. Furthermore, it was found that the safety analysis and reliability analysis chose the weak pipes and areas which have relatively larger diameter.
P-y Curves from Large Displacement Borehole Testmeter for Railway Bridge Foundation
Kim, Jong-Chil ; Cho, Kook-Hwan ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 1, 2016, Pages 187~192
DOI : 10.9798/KOSHAM.2016.16.1.187
Applied lateral load and moment on railway bridge foundation are usually larger than other transportation bridge foundation. Therefore, high strength steel pipe piles are used for Honam high speed railway bridges to resist lateral load and moment, even though those are much more expensive than concrete piles. It is very important to measure soil characteristic under lateral load from piles in order for economical design. A large displacement borehole testmeter (LDBT) is developed to measure nonlinear characteristics of the soil applied bored pile in this study. Most in-situ borehole test devices to estimate p-y curves can measure low displacement range in soil, which is usually in elastic range. Non-linear characteristics of the soil which is one of the most important characteristics of the soil cannot be obtained. The research result shows that the measured p-y curves using LDBT can be properly matched with back-calculated p-y curves from field tests by applying scale effects for sand. The developed technique using LDBT is verified lateral load test comparing with pile head deflection under field.
Seismic Hazard Evaluation for Architectural Heritage in Seoul Area
Hwang, Hea Jin ; Park, Hyung Choon ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 1, 2016, Pages 193~204
DOI : 10.9798/KOSHAM.2016.16.1.193
Earthquake could cause severe damage to the architectural heritage which should be conserved. The ground shaking by earthquake generates the dynamic loading to the structure on the surface and this dynamic loading can cause damage (such as collapse) to the structure. The magnitude of this dynamic loading is proportional to that of ground shaking. Therefore, seismic hazard can be determined through the evaluation of ground shaking. In this study, seismic hazard of architectural heritages in Seoul is evaluated by site investigation using surface wave method and site-specific ground response analysis.
Numerical Study on Two-Phase Flow of Sand and Water Mixture in Pipelines
Lee, Wonjun ; Lee, Jeongho ; Yun, Rin ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 1, 2016, Pages 205~211
DOI : 10.9798/KOSHAM.2016.16.1.205
Torrential rainfall in Korea causes the large amount of water and soil mixture flow into drainage pipes. Soil in the mixture is sedimented in drainage pipes and frequently blocks the pipes, results in flooding in a city. In the present study, the effects of inlet velocity, size of soil particle, and volume concentration of soil in the soil and water mixture on the flow characteristics and the soil distribution inside the pipe were numerically investigated by using the two-phase mixture model. The horizontally located pipe, whose length and diameter are 10 m and 0.6 m, was used in this simulation. With increase of inlet mixture velocity, velocity at the upper part of the tube is higher than that at lower part by 14.9%, and the volume fraction of soil from bottom to 0.2 m of tube decreased subsequently by 4.6%. The distribution of mixture velocity and soil volume fraction is getting uniform with increase of the inlet volume fraction of the soil in the mixture. With increase of size of the soil particle, the soil concentration increased subsequently by 6.6% from bottom to 0.2 m of the pipe, which make significant distortions in velocity distribution in tube.
Analysis on the Effects of Inundation Mitigation according to Revise the Border for Urban Drainage System
Song, Yang Ho ; Park, Moo Jong ; Lee, Jung Ho ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 1, 2016, Pages 213~220
DOI : 10.9798/KOSHAM.2016.16.1.213
In this study, we effectively reduce the flood damage through a revise the border for district unit urban drainage system and propose a design technique over the configuration of the sewer network. It was selected in adjacent urban drainage system, analysis the results for the revise of the watershed boundary and inundation reduction effect. The main nodes were chosen to generate a flood damage, the flood mitigation effect was verified. It proposed a emphasis point for revise the border for urban drainage system.
Evaluation of the Impact of Priority Order Water Rights on Single Reservoir Operation
Kim, Tae Jin ; Kim, Jung Ho ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 1, 2016, Pages 221~226
DOI : 10.9798/KOSHAM.2016.16.1.221
Nowadays, global warming derived from urbanization makes impact on the climatical and natural environment in the world. Also, water shortage from sharp population growth has increased because of impossible condition of the new reservoir construction that is one of sustainable water resource development. Accordingly, data survey for water rights have been required for limited water resources distribution effectively. Now, Water Management Information System(WAMIS) has gathered domestic water rights data according to various criteria as follows: living, industrial, and agricultural use purposes for specific year based on watershed, basin, river size. In this study, Water Rights Analysis Package (WRAP), one component of Texas Water Availability Model (WAM) system, is applied to multi-purpose Soyang Dam with monthly flow, evaporation, and precipitation. Also, water rights data are utilized into two types: natural and priority order water rights. The application results indicated that two types of water rights provided the insight for establishing various reservoir operation plans under flood, normal, and drought periods.
Development of Operation in Urban Offline Detention Reservoirs
Lee, Eui Hoon ; Lee, Yong Sik ; Joo, Jin Gul ; Kim, Joong Hoon ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 1, 2016, Pages 227~236
DOI : 10.9798/KOSHAM.2016.16.1.227
Recently, the ratio of impervious area, the number of extreme rainfall and runoff in urban areas are dramatically increasing. Because of this reasons, the number of flood disasters are also increasing and there are several measures such as structural measures and nonstructural measures. In this research, operation of drainage facilities among non-structural measures is focused. Operation in urban offline detention reservoirs among drainage facilities was studied. Operation obtaining additional capacity in detention reservoir by storage and discharge considering the status of sewer network was suggested. First flooded node in sewer network was selected as a monitoring point using probability rainfall data and operation of offline detention reservoir was determined according to the level of monitoring point. For verifying effects of new operation, rainfall data in 2010 and 2011 were applied to. In the case of 2010, maximum flood reducing effect of new operation was 28.52% and in the case of 2011, maximum flood reducing effect of new operation was 16.81%.
Analysis on the Optimal Radar Scan Interval for Urban Flood Prediction
Hwang, Seok Hwan ; Oh, Byung Hwa ; Lee, Dong Ryul ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 1, 2016, Pages 237~246
DOI : 10.9798/KOSHAM.2016.16.1.237
In the current practice, the radar scan method for precipitation estimation periodically observes regions where heavy rainfall is expected with the rotation of the radar. This is different from ground observation devices, such as rain gauge, which continuously observe cumulative precipitation. Different observation methods can cause the precipitation estimation accuracy to vary spatio-temporally. Therefore, quantitative precipitation estimation is needed to improve the accuracy of areal rainfall estimation according to the radar scan interval. For this, an error analysis has been performed according to the scan time in this study after instantaneous observation data were generated at each scan interval using the minute-unit precipitation data obtained by a ground gauge through an observation method that is similar to radar observation. The analysis result showed that there was a drastic increase in the uncertainty of rainfall estimation at scan intervals of 10 and 5 minutes compared with that at scan intervals of 3 and 2 minutes in all cases that relative error, absolute elative error, and correlation of the instantaneous estimation as to the continuous estimation. In the analysis with the actual radar observation data, the relative error tended to increase as the scan interval increased, and it tended to increase drastically with intervals equal to or larger than 3 minutes.
Assessment of Design Snow Depth for Green House Using Frequency Analysis
Yu, Insang ; Kim, Dohyung ; Jeong, Sangman ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 1, 2016, Pages 247~254
DOI : 10.9798/KOSHAM.2016.16.1.247
In this study, snow depth frequency analysis was performed from 69 guaging stations to evaluate design snow depth for green houses. A 30-year recurrence interval snow depth of administrative districts was estimated using the results of snow depth frequency analysis. The design snow depth for green house was assessed and compared with the 30-year recurrence interval snow depth which was calculated in this study. The results show that design snow depth for 77 administrative districts were appropriate out of the 230 administrative districts. Design snow depth for the other 153 administrative districts are lower than the 30-year recurrence interval snow depth. The 30-year recurrence interval snow depth of 61 administrative districts was 1%~10% more than design snow depth, 28 administrative districts was 11%~20% more than design snow depth, 24 administrative districts was 21%~30% more than design snow depth, 40 administrative districts was 30% more than design snow depth. This study is expected to decide vulnerable administrative districts to heavy snow depth and apply improvements of design snow depth for green houses.
Analysis on Reliability for the Storm Sewer considering Sedimentation
Song, Yang Ho ; Lee, Jung Min ; Lee, Jung Ho ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 1, 2016, Pages 255~263
DOI : 10.9798/KOSHAM.2016.16.1.255
In this study, analysis of reliability of sewer network was progressed with the number of overflow nodes and overflow volume simultaneously for urban areas considering sedimentation. Reliability analysis shows that it is possible to quantify the difference in the phenomenon of the destruction of sedimentation in urban sewer system under the same design frequency. It is proposed as one of the indicators evaluated as full reliability for sewer system. To analyze detailed changes in conduit designs in urban sewer networks, tried to reduction of sedimentation in sewer networks using modified pipe slope in Bujeon-dong catchment, Busan. The various sewer designs were applied and then, the most effective improvement of reliability over 10%. Suggested reliability process can produce the quantitative evaluations about sewer systems using the results of the system simulations and use of possible the objective function for the sewer network designed with a relative evaluation.
Performance Evaluation of CMIP5 GCMs using CSEOF Analysis
Cho, Eunsaem ; Lee, Jinwook ; Yoo, Chulsang ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 1, 2016, Pages 265~273
DOI : 10.9798/KOSHAM.2016.16.1.265
IPCC developed four climate change scenarios, called the RCP scenarios, to enhance the quality of future climate projection. Also, IPCC conducted CMIP5 to evaluate various GCM simulations under RCP scenarios. This study performed the CSEOF analysis with ten GCM simulations which belong to CMIP5, and evaluated the performance of GCMs by comparing the analysis results with those of GPCP observed data. Data period for the performance evaluation was determined to be from 2006 to 2014, which covers both GCM simulations and observed data. Pattern correlation and NRMSE, which are the measure of correlation and error, were used to compare GCM simulations with observed data. As a result, it was found that NorESM1-M and NCAR-CAM5 have good performance among ten GCMs.
Flood Risk Assessment by Integrating Results from Average Index Method and PROMETHEE
Lee, Jong Seok ; Nam, Young Gyu ; Choi, Hyun Il ; Cho, Gyu Tae ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 1, 2016, Pages 275~280
DOI : 10.9798/KOSHAM.2016.16.1.275
This study has performed the flood risk assessment in order to provide preliminary information in the establishment of flood risk management and damage reduction strategies. The twelve representative flood risk factors were carefully selected for the flood risk assessment based on the P-S-R(Pressure-State-Response) classification system, and spatially constructed for the nationwide 812 standard watersheds of the national water resource unit map. The relative flood risk was estimated by the two methods; the one is a FRI(Flood Risk Index) by averaging the three flooding indexes such as PI(Pressure Index), SI(State Index), and RI(Response Index) by each four flood risk factor classified from the twelve factors, and the other is the PROMETHEE(Preference Ranking Organization METHod for Enrichment Evaluation) by estimating a complete outranking from the preference matrix analysis for the twelve alternatives. This study has newly presented the final flood risk determined by the higher risk value of two flood risk assessment results, which is expected to be used to identify flooding risk areas in terms of the integrated flood risk management.
Evaluation of Dual Polarization Rainfall Estimation Algorithm Applicability in Korea: A Case Study on Biseulsan Radar
Kim, Gildo ; Ku, Jung Mo ; Ro, Yonghun ; Yoo, Chulsang ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 1, 2016, Pages 281~293
DOI : 10.9798/KOSHAM.2016.16.1.281
Dual polarization radar provides comprehensive information about rainfall by measuring multiple parameters. In Korea, for the rainfall estimation, JPOLE and CSU-HIDRO algorithms are generally used. This study evaluated the local applicability of JPOLE and CSU-HIDRO algorithms in Korea by using the observed rainfall data collected on the August, 2014 by the Biseulsan dual polarization radar data and KMA AWS. A total of 11,372 pairs of radar-ground rain rate data were classified according to thresholds of synthetic algorithms into suitable and unsuitable data. Then, evaluation criteria were derived by comparing radar rain rate and ground rain rate, respectively, for entire, suitable, and unsuitable data. The results are as follows: (1) The radar rain rate equation including specific differential phase was found better in the rainfall estimation than the other equations for both JPOLE and CSU-HIDRO algorithms. The thresholds were found to be adequately applied for both algorithms including specific differential phase. (2) The radar rain rate equation including horizontal reflectivity and differential reflectivity were found poor compared to the others. The result was not improved even when only the suitable data were applied.
Improvement of Instream Flow Evaluation Methodology and Application
Kang, Seongkyu ; Yoo, Chulsang ; Lee, Dongryul ; Choi, Sijung ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 1, 2016, Pages 295~304
DOI : 10.9798/KOSHAM.2016.16.1.295
The instream flow is the flow that should be remained in the river for protecting aquatic ecosystem and various natural resources. The first appearance of its concept was 1960's in the law of the Korea. 'Instream Flow Guideline' was built in mid 1990s by government and the term 'instream flow' appeared in the Korean River Act. In late 1990s, instream flows for major rivers were calculated and officially notified in 2006 for management and monitoring. 'Instream Flow Guideline' revised in 2009 and nation wide evaluation project of instream flow had conducted from 2007 to 2011 according to this new guideline. After this project, the instream flows of tributaries was made to public announcement in 2015. The concepts of instream flow abide by time periods, laws and regulations are shown in this study. Hydrological method which contains concept of natural flow regime is essential for evaluating instream flow. Also requirement flows of instream flow should be decreased to 4 types from present 8 types. This new evaluation method applied in the Keumgang river.
Some Problems and Improvement of Domestic System for River Environment Assessment
Chun, Seunghoon ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 1, 2016, Pages 305~317
DOI : 10.9798/KOSHAM.2016.16.1.305
This study carried out to develop a standardized assessment system of river environment in Korea, for an effective management of river environment based on the River Act by MLIT. Existing legislative criteria and guidelines and advanced cases abroad had been reviewed. It was concluded that the current domestic assessment system fail to reflect various characteristics of Korean river condition and the validity of the system was not scientifically verified. In addition, zoning and programs were not established effectively due to the lack of scientific assessment system in process of master plan for river management. Therefore, this study proposed a Korean assessment system of river environment, a standardized five steps composed of aim and scope, assessment areas and indicators. The assessment units were linked with river classification and integrated assessment methods were associated with Web-GIS. For the efficiency of assessment system suggested, new regulation for planning of river environment integrated with plan for water resources must be legislated. Also, quantitative criteria for zoning and purposes for management should be established based on results obtained from the application of the assessment system.
Tsunami Inundation Map due to Fault Sources at Ryuku Trench
Lee, Hyun-Ha ; Cho, Hye-Rin ; Cho, Yong-Sik ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 1, 2016, Pages 319~328
DOI : 10.9798/KOSHAM.2016.16.1.319
Recently, natural coastal hazards such as tsunamis, storm surges and sea level rising have increasingly threatened coastal communities. Among them, a tsunami may cause devastating damage not only neighboring areas but also distant areas. An effective and economic way for tsunami hazard mitigation planning is to develop inundation maps at those coastal communities vulnerable to tsunami invasions. In this study, tsunamis generated at the Ryukyu Trench zone located off the southern coast of the Korean Peninsula are investigated. A composite numerical model based on the shallow-water theory is employed to obtain inundation maps at Samchunpo and Tongyeong Ports. These maps can be used by local authorities to make mitigation plans and hazard maps against unexpected tsunami attacks.
Key Parameters and Input Variables for the Reduction of Uncertainty using Modified Pedigree Matrix
Chung, Gunhui ; Sim, Kyu Bum ; Kim, Eung Seok ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 1, 2016, Pages 329~336
DOI : 10.9798/KOSHAM.2016.16.1.329
Due to the rapidly increased urbanization and climate change, impervious area becomes smaller and torrential rainfall is occurred frequently. These caused severe urban flood with severe property damages and human lives. To cope with the urban flood, pumping stations with retention/detention ponds have been constructed. Therefore, the pumping stations have to be included in the urban flooding system or rainfall-runoff systems for the accurate analysis, the uncertainty incurred by the rainfall-runoff models or input data and/or parameters caused difficulties. In this study, modified Pedigree matrix is proposed based on the original Pedigree matrix and input data and parameters which might cause the uncertainty in the systems are selected. The contribution is analyzed with the modified Pedigree matrix and uncertainty index. As a result, basin width and roughness of pervious and impervious areas have the highest contribution to the uncertainty and the more accurate estimation is required. The proposed results could be applied in the pumping station operations in the urban area.
Social and Economic Disaster Vulnerability Assessment Considering Urban Characteristics of Seoul
Park, Yoonkyung ; Yang, Jeong-Seok ; Kim, Sangdan ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 1, 2016, Pages 337~345
DOI : 10.9798/KOSHAM.2016.16.1.337
This study is assessed social and economic vulnerability to natural disasters considering urban characteristics of Seoul. For this study, an indicator-based model, which is composed of 3 sub-indicators and 17 surrogate variables is applied. The 3 sub-indicators consist of demographic and social indicator, secondary damage caused indicator, and disaster preparedness and response indicator, and individual sub-indicators are made up of 6, 5, and 6 related surrogate variables. The spatial resolution of each surrogate variable is built in census output area as possible to reflect the local complexity of population density and wealth distribution. From the results of the application of the model, it can be confirmed that even if the same borough, a variety of vulnerabilities appear depending on the census output area-specific characteristics. Given vulnerability assessment result can be associated with the exposure information of a variety of natural disasters such as floods, landslides, earthquakes, and so on, and its result is expected to be utilized for prioritization of the disaster prevention projects characterized by the specific borough.