실측 경사장 및 경사도를 고려한 양구 해안면 유역의 유사량 평가

유동선 ( Dongseon Yoo ),박윤식 ( Younshik Park ),김종건 ( Jonggun Kim ),장원석 ( Wonseok Jang ),김기성 ( Ki-sung Kim ),임경재 ( Kyoung Jae Lim ) 한국농공학회 2008 한국농공학회 학술대회초록집 Vol.2008 No.-

In this study, area-weighted slope and slope length module, considering measured field slope and slope length of the agricultural fields within the subwatershed, was developed using the ArcView Avenue programming to reflect the field topography of the SWAT(Soil and Water Assessment Tool) HRU in simulating the hydrology and water quality. Flow and sediment yield estimated values of the SWAT were compared with and without applying area-weighted slope and slope length module, developed in this study. There was 103% increases in estimated sediment with area-weighted slope and slope length module for the study watershed. The soil erosion and sediment yield from only agricultural field in Hae-an watershed was also assessed. There are 111% increase in estimated soil erosion and 112% increase in estimated sediment by applying area-weighted slope and slope length module.

SWAT HRU의 공간적인 지형 특성을 고려한 유사평가 분석

장원석 ( Jang Wonseok ),유동선 ( Yoo Dongseon ),박윤식 ( Park Younshik ),김종건 ( Kim Jonggun ),최중대 ( Choi Joongdae ),임경재 ( Lim Kyoung Jae ) 한국농공학회 2008 한국농공학회 학술대회초록집 Vol.2008 No.-

There are wide ranges of hydrologic and water quality models available. Among those the watershed scale Soil and Water Assessment Tool (SWAT) has been widely used, compared with other models because of its prediction accuracy and functionalities in simulating the runoff, sediment, nutrient, and pesticide at spatial and temporal context. The SWAT model, semi-distributed model, first divides the watershed into multiple subwatersheds, and then extracts the basic computation element, called the Hydrologic Response Unit (HRU) with land use and soil maps. In the process of HRU generation, the spatial information of land use and soil maps within each subwatershed is lost because the SWAT model is semi-distributed model. In other words, the areas with the same land use and the same soil are grouped into one single HRU within each subwatershed although its topographic features are significantly different. The SWAT model estimates the HRU topographic data based on the average slope of each subwatershed, and then use these topographic data for all HRUs within the subwatershed. To improve the SWAT capabilities for various watershed scenarios, the Spatially-Distributed HRU (SD-HRU) module was developed in this study to simulate site-specific topographic data, instead of using the same topographic data for all HRUs. The SD-HRU was applied to the Hae-an watershed, where field slope lengths and slopes are measured for all agricultural fields to examine the necessity of using the SD-HRU in accurate sediment simulation using the SWAT model. It was found that the simulated sediment decreased by 26 %, compared with currently available SWAT model and decreased by 68 %, compared with the result using SWAT area-weighted slope and slope length module. The analysis revealed that the SD-HRU module needs to be applied in SWAT sediment simulation for accurate analysis of soil erosion and sediment behaviors. If the SD-HRU module is not applied in SWAT runs, the other SWAT factors may be over or under estimated, resulting in errors in physical and empirical computation modules although the SWAT estimated flow and sediment values match the measured data reasonably well.

VFSMOD-W 모형을 이용한 SWAT 모형의 초생대 유사 저감 효율 모듈 개선

박윤식 ( Younshik Park ),김종건 ( Jonggun Kim ),장원석 ( Won-seok Jang ),유동선 ( Dongseon Yoo ),최중대 ( Joongdae Choi ),임경재 ( Kyoung Jae Lim ) 한국농공학회 2008 한국농공학회 학술대회초록집 Vol.2008 No.-

Environment problem has been arising in many countries. Especially, soil erosion has been deemed as one of the biggest issues because sediment causes muddy water and pollutants, such as agricultural chemicals, flow in the stream with this sediment. Many studies, regarding soil loss and non-point source pollution from watershed, has been performed while serious problem has been known. Soil loss occurred in most agricultural area by rainfall and runoff. It makes hydraulic structure unstable, causes environmental economical problems because muddy water destroys ecosystem and causes intake water deterioration. As revealing serious effects of muddy water by sediment, many researches have been doing with various methods. Hydraulic structures establishments such as soil erosion control dams and grit chamber are common. Vegetative filter strip is investigated in this study because vegetative filter strip is designed for reducing sediment from upland areas of the watershed, and it has many functions, not only sediment reduction but also runoff water quality improvement and wildlife habitat. With these positive functions of the vegetative filter strip, the study about vegetative filter strip has been increasing for reducing sediment because it is more effective than hydraulic structures from an environmental perspective. But the sediment trapping efficiency by vegetative filter strip, needs to be investigated and designed first. Therefore the model, VFSMOD-W, was used in this study as it can estimate sediment trapping efficiency of vegetative filter strip under various field, vegetation, weather condition. Sensitive factors to sediment trapping efficiency are studied with VFSMOD-W, and sediment trapping efficiency equation has been derived using two most sensitive factors. It is thought that the equation suggested in this study can be used in Soil and Water Assessment Tool (SWAT), to overcome the limit of SWAT filter strip module, which is based solely on filter strip width.

겨울철 융설을 대비한 바이모달 트램 재해관리 시스템의 SWMM 모형 적용성 평가

김종진(Jonggun Kim),박영곤(Youngkon Park),윤희택(Heetaek Yoon),박윤식(Younshik Park),장원석(Wonseok Jang),유동선(Dongseon Yoo),임경재(Kyoung Jae Lim) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-

Increasing urban sprawl and climate changes have been causing unexpected high-intensity rainfall events. Thus there are needs to enhance conventional disaster management system for comprehensive actions to secure safety. Therefore long-term and comprehensive flood management plans need to be well established. Recently torrential snowfall are occurring frequently, causing have snow traffic jams on the road. To secure safety and on-time operation of the Bi-modal tram system, well-structured disaster management system capable of analyzing the urban flash flooding and snow pack melt/freezing due to unexpected rainfall event and snowfall are needed. To secure safety of the Bi-modal tram system due to torrential snowfall, the snow melt simulation capability was investigated. The snow accumulation and snow melt were measured to validate the SWMM snow melt component. It showed that there was a good agreement between measured snow melt data and the simulated ones. Therefore, the Bi-modal tram disaster management system will be able to predict snow melt reasonably well to secure safety of the Bi-modal tram system during the winter. The Bi-modal tram disaster management system can be used to identify top priority area for snow removal within the tram route in case of torrential snowfall to secure on-time operation of the tram. Also it can be used for detour route in the tram networks based on the disaster management system predicted data.

SWMM 모형을 이용한 홍수시 바이모달 트램 운행 노선에 대한 침수 면적 산정 모듈 개발

김종건(Jonggun Kim),박영곤(Youngkon Park),윤희택(Heetaek Yoon),박윤식(Younshik Park),장원석(Wonseok Jang),유동선(Dongseon Yoo),임경재(Kyoung Jae Lim) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-

Urban flooding with surcharges in sewer system was investigated because of unexpected torrential storm events these days, causing significant amounts of human and economic damages. Although there are limitations in forecasting and preventing natural disasters, integrated urban flooding management system using the SWMM engine and Web technology will be an effective tool in securing safety in operating Bi-modal transportation system. In addition, the integrated urban flooding management system can be linked with general and transportation-related disaster management system in the future. In this study, With simulated values by the SWMM, which is a core engine of the Bi-modal disaster management system, flash flooding area estimation module was developed. Thus, the SWMM system codes were modified and new module was developed and integrated with the existing SWMM interface using the Delphi programming language. The flash flooding area estimation module is fully integrated with the SWMM interface, thus the area is estimated on-the-fly inside the system.

Development of Prototype Web-based Disaster Management System for Safe Operation of Next Generation Bi-Modal Tram

김종건(Jonggun Kim),박영곤(Youngkon Park),윤희택(Heetaek Yoon),박윤식(Younshik Park),장원석(Wonseok Jang),유동선(Dongseon Yoo),임경재(Kyoung Jae Lim) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.5월

최근 들어 한국철도기술연구원 (KRRI) 에서는 자동운행이 가능한 바이모달 트램 시스템을 개발하고 있다. 이 바이모달 트램 시스템은 노선에 설치된 센서를 자동으로 인식하여 자동 운행을 하며, 재해 발생시 수동으로 운행될 수도 있다. 바이모달 트램 시스템이 노선에 설치된 센서를 인식하여 자동운행을 하기 때문에, 기후패턴 변화에 따른 집중강우로 인해 예기치 않은 홍수 발생시 바이모달 트램 시스템 승객 및 차량의 안전이 확보되어야 한다. 따라서 본 연구에서는 Web GIS 기반의 트램 재해관리 시스템 (Bi-modal Tram Disaster Management System: BTDMS) 프로토타입 버전을 개발하였다. 이 BTDMS 시스템은 US EPA에서 개발한 SWMM 모형을 핵심 엔진으로 활용하여 지표면 유출 및 관거 해석을 수행한다. 본 연구에서는 기상청 예측 강우량 자료를 이용하여 실시간 내수침수 예측을 수행할 수 있는 모듈, 지표면 유출수의 흐름을 고려할 수 있는 모듈, 그리고 지역별로 유출심을 산정하여 바이모달 트램 시스템 운행 판단의 기준자료로 활용할 수 있는 모듈을 개발하여 BTDMS 에 추가하였다. 이러한 모듈을 이용하여 예측된 자료는 바이모달 트램 시스템의 운행 속도를 늦추거나 우회노선을 선택하는데 활용될 수 있을 것이다. 본 연구에서 개발한 Web GIS 기반의 BTDMS는 2009년 상반기 밀양 지역에 설치될 바이모달 트램 시범지역에 적용되어 그 적용성이 평가될 것이다.