GIS를 이용한 격자크기 별 도달시간 산정

고병련 ( Byoung-ryoun Koh ),박동일 ( Dong-il Park ),오영훈 ( Young-hun Oh ) 한국환경기술학회 2017 한국환경기술학회지 Vol.18 No.1

본 연구에서는 NRCS공식과 Kerby공식을 GIS에 적용하여 격자크기에 따라 도달시간을 산정하였다. 유역경사에 따른 오차를 최소하여 GIS에서 격자 단위로 도달시간을 산정 하였다. 또한 각 공식별 중요인자도 격자크기별로 구분하여 적용하여 도달시간을 비교 분석하였다. NRCS 공식에 대입한 도달시간 결과, 1 m 당 도달시간은 0.197분 Kerby 공식은 1.825분으로 분석되어 NRCS 공식에 비해 Kerby 공식이 약 10배 정도 큰 것으로 분석되었다. 또한 기존 하천기본계획의 도달시간과 비교한 결과, NRCS공식 도달시간과 비교적 일치하는 것으로 GIS를 이용한 도달시간 산정결과가 적용성이 있음을 알 수 있었다. 따라서 격자 단위로 분석된 도달시간을 이용하여 설계홍수량, 수문모형 등의 기초 자료로 활용하고 할 수 있을 것으로 판단된다. In this study, we estimate the time of concentration by applying the SCS method Kerby method in GIS. Minimize error due to watershed slope were time of concentration of arrival in the GIS unit to the grid. In addition, important factors were also analyzed for each official time of concentration to apply separately for each grid size. In addition, the comparison with the Time of concentration of existing River master plan, As matching NRCS method time of concentration and was found to reach a time of concentration and that the applicability of the GIS. Therefore, using the time of concentration the grid analysis unit is expected to be utilized as the basis for the design, such as flood, hydrologic models.

지하터널 설치에 따른 지하수 유동변화 특성

고병련 ( Byoung Ryoun Koh ),최윤영 ( Yun Yeong Choi ),고수현 ( Soo Hyeon Ko ) 한국수처리학회 2006 한국수처리학회지 Vol.14 No.4

도시하천에서 수질개선을 위한 희석유량의 산정

고병련(Byoung-Ryoun Koh),조현경(Hyeon-Kyeong Cho),정광옥(Kwang-Ok Chong) 한국환경관리학회 1997 環境管理學會誌 Vol.3 No.1

수리모형실험과 수리모델링을 이용한 지하수 연계 분석

고병련 ( Byoung-ryoun Koh ),오영훈 ( Young-hun Oh ),박동일 ( Dong-il Park ),안승섭 ( Seung-seop Ahn ) 한국환경기술학회 2016 한국환경기술학회지 Vol.17 No.3

지하수특성 분석을 위해 수리모형실험과 MODOFLW 모델링을 이용하여 대수층에서 인위적 주입담수의 지하수거동 연구를 실시하였다. 수리실험과 모델링 모두 초기 주입량 없이 대수층 상부 지하수위는 238 mm, 하부 지하수위는 196 mm로 유지하여 지하수 평형상태에서 분석을 실시하였다. 수리실험결과 담수 주입속도가 1.9 ml/min인 경우 유동거리는 L239.2 mm, 대수층에 주입된 담수의 확산 반경은 R43.7 mm로 나타났으며, 담수 주입속도를 4.1 ml/min로 주입한 결과 L253.3 mm, R76.8 mm, 주입속도가 6.4 ml/min인 경우 L495.0 mm, R95.4 mm으로 분석되었으며, 각각의 주입속도별 유출량을 조사한 결과 4.1 ml/min의 주입 시 지하대수층에서 주입된 담수가 장기간 유지하고 있는 것으로 분석되었다. MODFLOW 모델링을 통해 주입량에 따른 주입정 인근 지하수위를 분석한 결과 각각의 주입량에 따라 El. 23.26 m, El. 23.39 m, El. 23.54 m으로 분석되었으며, 주입속도별로 지하수 유동방향은 주입관정의 하류부에 주입량에 따라 유동 속도가 커지는 것으로 분석되었다. For the analysis of groundwater characteristics, a study was conducted on the behavior of groundwater of artificially injecting fresh water using a hydraulic model experimental and hydraulic modeling. An analysis was conducted in the state of groundwater equilibrium by mainitaining the groundwater level of the upper aquifer to be 238 and the lower groundwater level to be 196 mm. The results of the hydraulic experiment found L239.2 of the flow distance mm for 1.9 ml/min in a fresh water injection rate, 4.1 of the diffusion radius of the fresh water injected in the aquifer. After injecting the fresh water injection rate to 4.1, the results were found to be L253.3 mm, R76.8 mm for the injection speed 4.1 and L495.0 mm, R95.4 mm for the injection speed 6.4. The results of testing the respective injection rate per discharge revealed that the fresh water injected from the underground aquifer for 4.1 ml/min injection. The analysis of the groundwater level near the injection wall through MODFLOW modeling found El. 23.26m, El. 23.39m, and El. 23.54m according to each injection. The groundwater flow direction by injection rate was observed to increase according to the injection amount in the downstream portion of the injection well.

물 수지 분석에 의한 제주지역의 지하수 침투량 추정

고병련(Byoung-Ryoun Koh),김성원(Sung-Weon Kim),최윤영(Yun-Yeong Choi) 한국환경관리학회 1996 環境管理學會誌 Vol.2 No.1

연구논문 : 해안지역 안정적 수자원 확보를 위한 기초적 연구

고병련 ( Byoung Ryoun Koh ),오영훈 ( Young Hun Oh ),안승섭 ( Seung Seop Ahn ) 한국환경과학회 2014 한국환경과학회지 Vol.23 No.12

Many countries around the world are amplifying interest and studies on irrigation, flood control and environment with concern on serious water problems. Especially for irrigation in water supply vulnerable areas such as coastal areas - islands, business on underwater resource security facilities are promoted to secure stable water resources due to development of society and increase of life quality. Also, various policies such as reuse of leaking underwater, utilization of underwater at waterfront, and artificial recharge, etc are planned and designed. In order to develop small sized underwater resource secure technology, verification of seawater-freshwater interface is executed and how the balance between these will develop is a great interest of coastal areas - islands. In this study, seawater-freshwater interface behavior analysis experiment was conducted while reflecting properties of coastal areas - islands and executed hydraulic similitude of saltwater intrusion form control technology on abstraction.

크리깅기법을 이용한 지하수위 분포추정

오영훈 ( Young-hun Oh ),박동일 ( Dong-il Park ),고병련 ( Byoung-ryoun Koh ) 한국수처리학회 2016 한국수처리학회지 Vol.24 No.6

Groundwater level distribution in Jeju north basin was analyzed with kriging methods. By using various kriging methods such as ordinary kriging, simple kriging, universal kriging, and co-kriging, the optimal groundwater level distribution in the study area was estimated. Before applying the kriging methods, a model with the lowest error in correlation analysis was selected with variogram, and as a result of the analysis, it was found that a Gaussian model showed the highest confidence level. By using the Gaussian model in the co-kriging with the highest overall error and confidence level, the groundwater distribution in 2015 was estimated. The result showed that there was no significant difference between the entire groundwater distribution and the monthly distribution, though there were some month-by-month difference in groundwater level around coastal lowlands. It was determined that in some local areas with high elevation such as the study area, the groundwater levels are also high. Based on the result, it was judged that the data would be utilized as basic materials in groundwater hydrographic modeling and groundwater analysis in the study area.Groundwater level distribution in study area was analyzed with kriging methods. By using various kriging methods such as ordinary kriging, simple kriging, universal kriging, and co-kriging, the optimal groundwater level distribution in the study area, was estimated. Before applying the kriging methods, a model with the lowest error in correlation analysis was selected with variogram, and as a result of the analysis, it was found that a Gaussian model showed the highest confidence level. By applying the Gaussian model to each kriging method, the interpretation of groundwater distribution was carried out.

신뢰도를 고려한 댐의 용수공급능력 해석

최윤영(Yun-Young Choi),박기범(Ki-Bum Park),고병련(Byoung-Ryoun Koh) 한국환경관리학회 2000 環境管理學會誌 Vol.6 No.3

해안지하수의 수위에 미치는 조석의 영향

박남식 ( Nam-sik Park ),오영훈 ( Young-hun Oh ),고병련 ( Byoung-ryoun Koh ) 한국환경기술학회 2014 한국환경기술학회지 Vol.15 No.6

본 연구는 해안지하수 적정관리 방안의 구축을 위해 제주와 같은 섬 지역에서 반드시 선행되어야 할 연구로 해안 및 도서 지역에서 해수침입은 해안지하수 확보 및 개발에 대한 심각한 요인으로 작용할 수 있다는 점에서 조석이 해안지하수의 지하수위에 미치는 영향을 분석하는데 있다. 연구대상지역으로 제주특별자치도에서 해수침입과 관련하여 자동관측하고 있는 제주성산유역의 수산관측공모니터링 자료를 분석하여 조석의 미치는 영향을 분석 하였다. 분석결과, 조석에 의한 지하수위, 수온, 전기전도도가 시간 별로 변화하고 있으며, 조석감쇄법으로 조석영향에 대한 반응시간을 제시하였다. This research is to be conducted in the island area like Jeju in order to establish the proper management method for coastal groundwater, and since the seawater intrusion in the coastal or island area can be the significant factor for the acquisition and development of coastal groundwater, it is to analyze the effect of tidal movement on the groundwater level. This research analyzed the relation between the groundwater level and the tidal movement based on the fishery peeping hole`s monitoring materials in Jeju-Sungsan area which the water resources headquarters of Jeju Island is observing automatically with respect to seawater intrusion. As a result, the groundwater level due to the tidal movement, the water=temperature and the electrical conductivity are changing by time, and according to the lag time calculated by the tidal damping method, the reaction time to the tidal influence is 1.43hr~ 3.68hr in average.

제주도의 용천기구에 관한 수문학적 연구

고병련,조현경 한국환경과학회 1997 한국환경과학회지 Vol.6 No.4

The characteristics of spring machanism in the Cheju Island were analyzed by statistical techniques. Basic characteristics, areal and altitudinal variations, and correlations of spring data were ivestigated. In this study, however, the subjects of the study are the 451 springs, the whole basin of Cheju Island devided into four groups. In this study, analyzed the spring phenomena on the basis of both the geologic elements and the topographic elements. Also, the spring zone in Cheju Island are classified into three types that the mountain area, the middle area, the coastal area in spring distribution by altitude. The quentity of spring and variability show subvariety on the average according to Meinzer's classification and the whole basin of spring shows various distributions from Third to Sixth. The results of this study can be utilized to evaluate the condition of groundwater development in Cheju Island.