저지대 농경지의 홍수범람 분석

전계원,이호진,Jun, Kye-Won,Lee, Ho-Jin 한국농공학회 2007 한국농공학회논문집 Vol.49 No.2

This study analyzes the flood inundation in low agricultural area caused by rainfall during typhoon periods and how flood inundation areas should be affected. GIS techniques, HEC-HMS and HEC-GeoHMS were used for flood runoff, HEC-RAS was applied in water surface elevation analysis at each cross-section. RMA2, SED2D were applied for runoff characteristics of inundation areas and river bed change and distribution of sediment. As a result, velocity distribution was analyzed 2.6 m/s-3.4 m/s in flood inundation by water level increase. In the case of bed elevation change, most sediments were deposited to the parts that adjoin bank.

소양강댐 방류량에 따른 하천의 수리특성 분석

전계원,전병희,이호진,오채연,Jun. Kye-Won,Jun. Byong-Hee,Lee. Ho-Jin,Oh. Chae-Yeon 한국방재학회 2008 한국방재학회 학술발표대회논문집 Vol.2008 No.1

In this study, we analyzed the hydraulic characteristics of rivers by dam discharge change affecting in the river environment. To do this, survey variability of the Soyanggang dam discharge. We analyzed hydraulic characteristics of rivers by the discharge using HEC-RAS model(linear dimension) and RMA2 model(two-dimension) and show the results.

숲가꾸기 산물의 이동특성 분석을 위한 기초연구

전계원,이호진,연규방,Jun. Kye-Won,Lee. Ho-Jin,Yeon. Gyu-Bang 한국방재학회 2008 한국방재학회 학술발표대회논문집 Vol.2008 No.1

Forest management is done to keep ecological health of forest and to enhancement of its function. Nowadays, the abnormal climate and heavy rain happen frequently. Therefore, there are opinions that the thinning slash allowed in the mountain is flowed in rivers, which can influence in flood damage. This study, we grasp moving characteristics of thinning slash through field survey and achieved basic study about the effect of thinning slash on the discharge capacity of rivers and stream structure.

수위변화에 따른 조압수조 내 수면진동에 대한 분석

전계원,이호진,박재성,안상도,윤영호,Jun,Kye-Won,Lee,Ho-Jin,Park,Jae-Sung,An,Sang-Do,Yoon,Young-Ho 한국방재학회 2007 한국방재학회 학술발표대회논문집 Vol.2007 No.1

Surge tank generally are used near the downstream end of tunnels of penstocks to reduce change in pressure caused by waterhammer resulting from load changes on the turbines. In this paper, the surge tank with chamber is selected to analyze water surface oscillation. the governing equation are derived using the law of conservation of mass and momentum. the water surface oscillation in the surge tank are computed using governing equation. In the case of upsurging, water surface oscillation is damped gradually and in the case of downsurging, it is damped rapidly.

산악지역 돌발홍수 경보발령 기준 설정에 관한 연구

전계원,오채연,연규방,이승철,전병희,Jun. Kye-Won,Oh. Chae-Yeon,Yeon. Gyu-Bang,Lee. Seung-Chul,Jun. Byong-Hee 한국방재학회 2007 한국방재학회 학술발표대회논문집 Vol.2007 No.1

The purpose of this study is to estimate the critical flood discharge and flash flood trigger rainfall for alarm system providing for a flash flood in mountainous. This study was effectively estimated a topographic characteristic factor of basin using the GIS. Especially, decided stream order using GIS at stream order decision that is important for input variable of GCIUH. Result that calculate threshold discharge to use GCIUH, at the Mureung valley basin, flash flood trigger rainfall was 16.34mm in the first 20 minutes when the threshold discharge was <TEX>$14.54\;m^3/sec$</TEX>.

GIS기반의 Weight of Evidence 기법을 이용한 토석류 및 산사태 예측도 분석

전계원(Jun, Kye Won),오채연(Oh, Chae Yeon),전병희(Jun, Byong Hee),장창덕(Jang, Chang Deok),윤지준(Yoon, Ji Jun),정승권 대한토목학회 2012 대한토목학회 학술대회 Vol.2012 No.10

토석류 유발 특성인자 분석에 관한 기초연구

전계원(Kye Won Jun)(全桂元),오채연(Chae Yeon Oh)(吳采姸),전병희(Byong Hee Jun)(田炳熙) 위기관리 이론과 실천 2011 Crisisonomy Vol.7 No.3

최근 기후변화에 따른 기상이변으로 인한 집중호우, 태풍 등에 의해 사면이 붕괴되거나 산사태, 토석류에 의해 막대한 경제적 손실과 인명피해가 빈번하게 발생하고 있다. 특히 강원도지역의 경우 대부분이 급경사의 산악지로 구성되어 있어 산사태나 토석류의 피해가 커지고 횟수 또한 증가하고 있다. 이러한 토사재해의 특성과 요인을 분석하기 위해 최근 GIS 및 원격탐사를 이용한 연구가 진행되고 있다. 본 연구에서는 토석류 발생유역의 특성을 조사하기 위해 강원도 인제군 가리산지역의 토석류 발생 전후 영상을 분석하여 재해 발생지역을 추출하고 디지타이징 하였고 토석류 발생영영별 수문학적, 지형학적 분석을 실시하기 위해 수치지형도를 이용하여 DEM생성, 대상유역 추출 및 공간자료를 수집 분석하였다. 또한 토석류 발생영역별 경사 및 하천과의 거리등을 고려한 상관관계 분석을 수행하였다. 그 결과 토석류 발생 특성 인자 중 발생부의 평균경사는 29°, 유하부의 평균경사는 23°, 퇴적부의 평균경사는 12°로 분석되었으며 하천유역을 따라 형성된 Buffer Zone 분석결과에서는 토석류와 산사태 발생 포인트 114개중 79개가 하천이 포함된 Buffer Zone에서 발생한 것으로 분석되었다. Because of localized torrential downpour, typhoon and other factors by the changes in climate, there have been slope failures, landslides and debris flows, which caused huge economic loss and human victims. Especially, because the most area of Gangwon province is composed of the steep sope mountains, the damages by the debris flow or landsliding are more frequent and frequency has been inreeased. To analyze the cause of such soil disaster, research using GIS and remote sensing is in process recently. In this study, to investigate the characteristic of the region where debris flow occurs, we analyzed the image before and after the occurrence of debris flow in Mt.Gari, Inje-Gun, Gangwon-do. By this analyzing, we extracted disaster zone and digitized it. Using digital map, we also formed DEM, extracted targeted basin, collected and analyzed spatial data to conduct hydrological and geopolitical analysis by debris flow-occurrencing areas. We conducted correlation analysis considering slope and distance from river as well. As a result, the mean slope of initiation was 29°, the mean slope of transport was 23° and the mean slope of deposition was 12°among the characteristics causing debris flow. Analysis about Butter Zone which composed along river valleys showed that 79 of 114 points where debris flow and landslide occur are in the Buffer Zone which includes river.

하구부 위험지역 분석을 위한 지상 LiDAR의 활용

전계원(Kye Won Jun)(全桂元),전병희(Byong Hee Jun)(田炳熙),이승철(Seung Chul Lee)(李承哲) 위기관리 이론과 실천 2013 Crisisonomy Vol.9 No.12

강원도 산지하천은 경사가 급하고 유로가 짧아 집중호우시 유사가 하류로 빠르게 이동하는 특징을 가지고 있다. 특히 동해안과 만나는 하천의 하구부에서는 하천유황과 흐름에 따라 다양한 지형변화가 일어난다. 또한 퇴적토사의 증가로 하구폐색현상이 일어나 하천환경적으로 위험지역을 형성한다. 따라서 본 연구에서는 최근 지형학, 해안선 변화, 하천지형 변화 및 재해현장 조사 등에 활용되고 있는 지상 LiDAR를 이용하여 강원도 삼척시 가곡천 하구부 지형변화에 따른 영향을 분석하였다. 그 결과 지형의 표고분석을 통해 하구부 폐색현상에 따른 침식지점과 퇴적지점 및 각 지점의 변동경향을 제시하였다. Mountain streams in Gangwon-do are characterized in that quicksand rapidly moves downstream in torrential rain because they are steep and have short channels. In particular, there are various topographic changes according to the river flow characteristics and flow at the mouth of the river which meets the east coast of Korea. In addition, estuary closure caused by an increase in sand deposits forms hazard areas in the fluvial environment. Therefore, this study analyzed the effects of changes in topography at the mouth of the Gagokchen in Samcheok-si, Gangwon-do with the use of terrestrial LiDAR used for geomorphology, changes in coastline and fluvial morphology and research of disaster site recently. As a result, height analysis of the topography showed the variation trends of each erosion and deposition site according to the estuary closure.

고랭지 농업 용수확보를 위한 소규모 빗물 이용시설 적용방안

전계원(Kye Won Jun)(全桂元),장창덕(Chang Deok Jang)(張昌德),정승권(Seung Kwon Jung)(鄭承權),전병희(Byong Hee Jun)(田炳熙) 위기관리 이론과 실천 2013 Crisisonomy Vol.9 No.8

최근 기후변화로 지난 2009년과 2012년에 강원도 태백시에서는 가뭄으로 인하여 엄청난 피해를 경험한 적이 있다. 또한 가뭄과 장마의 예측은 점점 더 어려워져 가는 실정이다. 특히 태백시의 87일간의 가뭄과 제한급수에 따른 피해액은 일상생활 134억원, 산업부문 338억원, 공공부문 47억원, 정신적ㆍ사회적 피해 1, 430억원 등 총 1, 949억원에 달하는 것으로 분석되었다. 태백시에 또 다른 큰 문제점은 가뭄으로 인한 고랭지 농업 피해로 인한 손실이다. 고랭지 배추를 생산하는 태백시는 우리나라 유일의 고산지역의 도시로서, 고랭지 농업이 특히 발달한 지역이다. 특히 태백 고랭지 배추는 태백시 농산품의 95.9%, 총 경지면적의 86.6%를 차지하고 있으므로, 배추의 생산성이 태백시 농산품 생산성을 대변한다고 할 수 있다. 본 연구에서는 태백시의 공공기관과 고랭지 농업 지역을 직접 방문하여 소규모 빗물 이용 시설에 대한 현황조사 및 시설의 상태를 점검하고 가뭄발생시 고랭지 농업지역의 피해를 최소화 할 수 있도록 소규모 빗물 이용 시설의 적용 방안 및 효과를 분석하였다. Recently, drought and rainy season are getting more serious. It is getting hard to forecast about drought because drought frequency is getting shorter than before. In 2009(winter) and 2012(summer), Taebaek-si was suffered from enormous damage due to the drought. Particularly, in 2009, cost of damage due to drought and restriction on water supply for 87days were estimated daily life sector 134 billion won, industry sector 338 billion won, the public sector 47 billion won, mental and social damage 1, 430 billion won. The other big issue of Taebaek is decrease in products of Highland Agricultural caused by the drought. Highland chinese cabbage which is the most important agricultural product in Taebaek-si account for 95.9% of all agricultural production of Taebaek-si and account for 86.6% of all gross area. For this reason, chinese cabbage of Taebaek-si is tropical agricultural product and is in charge of supply cabbage definitely. It is considered that if small scale rainwater harvesting system would be installed in highland agriculture area, it could reduce damage of drought at low cost and damage of cabbage would be decrease by system. For this study, We have researched regarding current status of Small Scale Rainwater Harvesting System of Highland Agriculture area in Taebaek-si and have compared with the amount of damage and installation cost in case of drought for the beneficial effects of Small Scale Rainwater Harvesting System, flexible supply of water and damage minimization of agricultural products.

국립공원 탐방로 안전지수 및 등급분석에 관한 연구

박준효(Pak, Jun-hou),전계원(Jun, Kye-Won),박상준(Park, Sang-Jun),김명준(Kim, Myeong-Jun),윤주웅(Yun, Ju-Ung) 한국산림휴양복지학회 2020 한국산림휴양학회지 Vol.24 No.4

본 연구에서는 탐방로 안전성 평가 모델을 활용하여 21개 국립공원을 대상으로 안전지수와 등급분석을 수행하였다. 현장조사를 통해 탐방로 주변 위험요소 중 하나라도 확인되면 취약구간으로 판단하여 안전지수를 산출하였다. 취약구간은 총 180.4km로 조사되었으며 탐방로 총 연장 1,995.5km 대비 약 9.0%로 확인되었다. 안전지수는 총 200점 중 최소 42.3점에서 최대 167.0점 분포를 보이고 평균값은 101.5점으로 나타났다. 안전지수를 토대로 등급을 분석한 결과, ‘관심(Concern)’ 등급은 60.8km(34%), ‘주의(Caution)’ 등급은 57.8km(32%), ‘위험(Dangerous)’ 등급은 49.6km(27%), ‘매우위험(Very dangerous)’ 등급은 12.2km(7%)로 나타났다. 매우위험 구간은 북한산국립공원(6.0km), 지리산국립공원(3.3km), 오대산국립공원(1.6km), 설악산국립공원(0.9km), 월악산국립공원(0.4km), 속리산국립공원(0.01km) 등 6개 국립공원 탐방로에서 총 12.2km로 나타났다. 북한산국립공원은 Y계곡, 의상능선 등이 해당되며, 지리산국립공원은 칠선계곡, 구룡계곡에서 확인되었다. 오대산국립공원은 노인봉 일원, 설악산국립공원은 공룡능선, 흘림골 등에서 나타났다. 월악산국립공원은 금수산 일원, 속리산국립공원 막장봉 구간이 매우위험 구간으로 나타났다. 본 연구는 향후 재난위험 저감대책 수립과 탐방로 정비 우선순위 선정 등 국립공원 안전관리 정책을 수립하기 위한 기초자료로 활용될 수 있다. In this study, the safety indexing and grading analysis were conducted for 21 national parks, using the trail safety evaluation model. If any one of the risk factors around the trail was identified through a field survey, the safety index was calculated by judging it as a vulnerability zone. The vulnerability zone was 180.4km in total, and it was found to be about 9.0% compared to the total length of 1,995.5km. The safety index was distributed from the minimum of 42.3 to the maximum of 167.0, and the average value was 101.5 of total 200 scores. As a result of analyzing the grade based on the safety index, 60.8km (34%) was in the ‘Concern’ grade, 57.8km (32%) was in the ‘Caution’ grade, 49.6km (27%) was in the ‘Dangerous’ grade, and 12.2km (7%) was in the ‘Very dangerous’ grade. ‘Very dangerous’ sections were found to be a total of 12.2 km. including 6 national park trails: Bukhansan National Park (6.0km), Jirisan National Park (3.3km), Odaesan National Park (1.6km), Seoraksan National Park (0.9km), Woraksan National Park (0.4km), Songnisan National Park (0.01km). In terms of ‘Very dangerous’ section, Bukhansan National Park included Y Valley and Uisang Ridge, and Jirisan National Park included Chilseon Valley and Guryong Valley. The area of Noinbong in Odaesan National Park, and Gongnyong Ridge and Heulimgol in Seoraksan National Park were included. And the Geumsusan area in Wolaksan National Park and Makjangbong in Songnisan National Park were found to be ‘Very dangerous’. This study could be used as basic data to establish national park safety management policies, such as selecting priority of trail maintenance and establishing countermeasures to reduce disaster risk.