레이더 반사강도와 강우강도 관계 평가

전일권,유양규,김운중 朝鮮大學校 建設技術硏究所 1999 建設技術硏究 Vol.19 No.1

It is essential to estimate the spatial distribution of the rainfall for the effective water resources management in flood season. In hydrological practice, the estimation of the spatial distribution of the rainfall has been executed by Thissen method which use surface raingauge data. But the surface rain- gauge data do not have the spatial continuity. The use of meteorological radar is very useful to improvement the defect. Therefore, a rainfall estimation method was studied which simultaneously use the meteorological radar data and the surface raingage data in this paper. At first, the theoretical radar principles and the empirical method to establish the relationship between radar reflectivity and rainfall rate was described. And the quality test method of the radar data and the coordinate conversion method was examined. Due to all of the principles and methods mentioned above, the relationship between radar reflectivity and rainfall rate was estimated and tested from the data measured on the Chungju multipurpose dam basin in 1993. As the result of the test, two set of relation coefficients were estimated at two raingauge sites, Sangdong A=30.12, β=1.2923 and Jinbu A=22.07, β=1.3693. The radar rainfall estimation method studied in this paper is very helpful to get the spatial distribution of flood rainfall and to forecast the flood flow.

소양호의 예비 방류 효과에 관한 연구

이재형,전일권,황만하 全北大學校 1995 論文集 Vol.39 No.-

The pre-release effects are estimated to achieve higher reliability both in water supply and in flood control. The technical tool of pre-release is as follows; 1) A portion of flood control storage is put to the use as water supply storage., 2) The water supply rent for the use of flood control when a flood is expected., 3) The penalty related with water supply storage is paid when the initial storage used for pre-release is not recovered after a flood. In this paper, we assume that the forecast of precipitation is possible. Then, it is applied to the flood events on Soyang reservoir area. That result shows that the method is useful to attain the object.

全州圈 貯水池의 물 收支 분석

이재형,김경수,전일권,황만하 全北大學校 附設 都市및環境硏究所 1994 都市 및 環境硏究 Vol.9 No.1

The major objective of this study is to analyze the water balance of the reservoirs in the Chonju area which the system of usage is very complicated. The water buget for the selected drought years is estimated. The monthly inflow of the reservoirs are calculated by Kagiyama method. According to the results of the water buget calculation, the supply of the water is usually satisfactory except during the drought years. For drought seasons, the small scale tributary water requirement and supply of water is considered to be unbalanced within the tributary basin itself. Therfore, water demand of the chonju area must be satisfied by use of the return flow and the water diverted from Geum river or Sumjin River Basin.

전주 지역의 공업 용수 수급에 관한 연구

이재형,김경수,전일권,황만하 全北大學校 附設 都市및環境硏究所 1994 都市 및 環境硏究 Vol.9 No.1

Demand and supply of industrial water in Chonju area is analysed. Because the industrial water is not enough for the drought period, many factorys at the Chonju industrial technology services center are damaged in 1994. Industrial water of the area is taken at Chon-mi intake field. But the intake rate is decreased by 2.4% per year due to silting and compaction of the a quifer port. Therefore the intake rate is not enough to supply the damand of water the center. In this study, The water from seqage treated id wuffested as an alternative for sev-ere drought period. The alternatives for a long time period are suggested : the j-oint operations of Ku-I reservoir and Ockjung reservoir, Da-a reservoir and Kum river barrier reservoir, Da-a reservoir and Young-dam reservoir.

강우 관측 자료를 이용한 대청댐 유역의 호우 추적

전일권(Ceon Ir Kweon) 대한토목학회 2001 대한토목학회논문집 A Vol.21 No.6A

홍수기의 섬진댐 최적 운영

전일권,김민환,김기성 호남대학교 산업기술연구소 1999 산업기술연구논문집 Vol.7 No.-

홍수기에 섬진 저수지의 최적 운영 방법을 제시하였다. 홍수시 최적 운영을 위해서 TROM(Technical Reservoir Operation Method), RROM(Rigid Reservoir Operation Method), 일정률 방류 기법(constant rate discharge method)을 적용하였다. 월별 홍수에 대해 각 방법을 이용하여 저류와 방류 특성을 비교하였다. 그 결과, 홍수기에 섬진댐의 최적 운영 방법과 월별 제한 수위를 제안하였다. 효율적인 방법은 RROM이며 6, 7, 8, 9월의 제한 수위는 각각 193.45m, 193.15m, 193.96m, 194.77m이었다. A optimal reservoir operation method of Sumjindam in the flood periods is developed. Technical reservoir operation method, rigid reservoir operation method and constant rate discharge method are applied for flood control operations. The storage and release characteristics of each operation scheme for the monthly probability flood are compared with simulation technique. As the result of this comparative study, the optimal operation method of Sumjindam and control water level of each month in the flood periods were proposed. The method is rigid reservoir operation method and the control water levels for June, July, August and September were 193.45m, 193.15m, 193.86m and 194.77m respectively.

금강 유역의 호우 거동에 관한 연구

전일권,정만 여수대학교 1996 論文集 Vol.10 No.-

It is estimated for the moving storm characteristics of the Geum river basin. In this study, it is emphasized that the wind speed and direction are related to the velocity and direction of the moving storm. The candidates for the moving storm are rainfall recorded over 80mm for independent storm. The analysis technique is used to linear regression method. The rewults shows that the relationship between the storm direciton ?? and the wind direction Wd is ?? and the relationship between the wind speed ?? and the storm speed ?? is ??

섬진강 하류의 하상변동 특성 분석 및 예측

전일권,김민환,Ceon. Ir-Kweon,Kim. Min-Hwan 한국방재학회 2009 한국방재학회논문집 Vol.9 No.1

섬진강 하류의 하상변동 특성 분석 및 하상변동을 예측함으로서, 하도 및 유역관리에 효과적으로 이용하도록 하였다. 하상변동 특성 분석에 필요한 자료(단면, 하상구성물질, 기점수위, 조도계수 등)는 섬진강하천정비기본계획에서 실측 및 분석한 것을 활용하였다. 또한 하상변동 예측은 HEC-6 모형으로 수행하였다. 본 연구의 주요 연구 결과를 요약하면 다음과 같다. 섬진강 하류 하상변동의 주요인은 수문인자의 변화에 따른 것이라기보다는 과도한 하상골재 채취 때문으로 판단된다. 마찰속도와 대표 입경의 관계와 무차원소류력과 대표입경의 관계를 토대로 하도안정성을 정성적으로 분석한 결과 섬진강 하류 하상은 대부분의 구간에서 상승하는 경향을 나타내고 있다. 섬진강 하도의 대부분의 지점에서 2003년의 하상구성물질은 1989년에 비해 자갈의 구성비가 높아지고 모래의 구성비가 작아졌다. 하상변동을 예측한 결과 섬진강 하류의 하상은 하구에서 약 9 km 지점까지 1.5 m 내외로 상승하고, <TEX>$9{\sim}21\;km$</TEX> 구간은 1 m 내외로 상승과 저하가 반복되며, <TEX>$22{\sim}25\;km$</TEX> 구간은 0.5 m 내외로 하강할 것으로 예상된다. 이러한 결과로 볼 때 섬진강 하류 구간의 하상은 대체로 점점 상승할 것으로 판단된다. 다만, 본 연구의 하상변동 예측은 인위적인 골재채취가 없다는 가정 하에 수행된 것이므로, 과거와 같이 하상에서 대규모 골재채취가 진행되면 본 연구의 예측 결과와는 상이하게 하상이 저하되는 결과를 초래할 것이다. It is to use effectively for stream channel and watershed management as the prediction and the analysis of bed changes characteristics in the Seomjin river downstream. The necessary data (section, bed composition material, pivot point water elevation, coefficient of roughness) with regard to analysis of the bed changes characteristics were based upon the survey data and analysis results in the Seomjin river maintenance basic plan. The prediction of bed changes was also completed with HEC-6 model. The study results were summarized as follows: The main factor of bed changes in the Seomjin river downstream can be decided by extreme extraction of bed aggregate rather than the change of hydrological data. According to the analysis of bed stability based on the relation between friction velocity and representative grain size, and the relation between dimensionless tractive force and representative grain size, the Seomjin river downstream appears to be increased overall. The bed composition material in the stream channel of the Seomjin river of 2003 year shows higher composition rate of gravel and lower composition rate of sand as compared to those of 1989 year. According to result that the prediction of bed changes, it is estimated that the bed will be risen approximately 1.5 m to the place up to 9 km from the estuary, have been repetitively risen and fallen up to 1 m to the place between <TEX>$9{\sim}21\;km$</TEX> section, and fallen about 0.5m to the place between <TEX>$22{\sim}25\;km$</TEX> section. As a result, the bed of the Seomjin river downstream can be decided to be risen gradually. However, since the prediction of this study is based on the assumption that there will be no forced aggregate picking, the bed changes can be much greater than expected when there is a massive aggregate picking as it had happened before.

섬진강 하류 구간의 염도 변동 특성

정만 ( Mahn Chung ),전일권 ( Ir-kweon Ceon ) 한국환경기술학회 2009 한국환경기술학회지 Vol.10 No.4

감조하천에서 기수역의 설정은 하천 또는 유역관리계획을 수립하는데 필수적으로 고려해야하는 중요한 인자이다. 특히 하천 및 하류 항만의 형상이 인위적으로 변경된 섬진강 하류의 경우는 기수역 구간이 변동하므로 이를 상세하게 파악할 필요가 있다. 본 연구에서 섬진강 하류 구간의 기수역을 추정하기 위하여 염도 변동 특성을 분석하였다. 이를 위하여 RMA 모형을 사용하였다. 염도 추정 결과, 하구로부터 섬진강 상류로 15 km 구간에서 광양만 개발 전에 비해 개발 후의 염도가 0.01∼1.11 ‰ 증가하였다. 한편, 하구로부터 25 km 및 30 km 지점에서 염도를 추정한 결과 0.00∼0.02 ‰ 이다. 이 결과로 볼 때, 섬진강 하류구간의 염도는 섬진강 상류에서 유입하는 유량과 광양만의 조위에 영향을 크게 받는다. 따라서 섬진강 상류에서의 유입량 또는 광양만의 조위가 변경되는 상황이 발생하면 유역관리계획 등을 수립할 경우 이를 고려해야한다. 본 연구 성과를 종합해 볼 때 섬진강 하류의 기수역 상한 구역은 하구로부터 23 km 지점으로 판단된다. In tidal river, brackish water zone`s establishment is important factor that must consider compulsory for establish rivers or basin administration plan. Specially, the Seomjin river downstream reach`s case that shape of river and downstream harbor is changed by artificial need to grasp this detailedly for brackish water zone changes. In this research salinity change characteristics analyzed to estimate the Seomjin river downstream reach`s brackish water zone. Used RMA model for this at this research. Result that analyze, if compare before the Gwang-yang bay development in the Seomjin river upper 15km zone from estuary, the salinity after development increased 0.01∼1.1 1‰. The salinity of 25km and 30km zone from estuary is 0.0∼0.02‰. When see as this result, the Seomjin river downstream reach`s the salinity is influenced greatly flux and the Gwang-yang bay`s tide level that flow in the Seomjin river upstream. Therefore, if situation that the Seomjin river upstream`s inflow rate or the Gwang-yang bay`s tide level is changed happens, establishment person must consider this in case establish rivers or basin administration plan etc. According to result that synthesize this study result, brackish water zone upper limit zone at downstream reach of the Seomjin river Is judged from estuary to 23km.

流成 貯水水準을 考慮한 貯水地 運營

이재형,이길수,전일권 전북대학교 공업기술연구소 1993 工學硏究 Vol.24 No.-

본 연구는 유역의 저수수준에 따라 대청댐의 빈도별 갈수에 대한 용수 공급을 충족시킬 뿐만 아니라 댐 하류의 홍수 피해를 최소화하기 위한 대청댐의 제한 수위를 산정한 것이다. 본 연구의 결과는 다음과 같다. 1. 대청댐 유역의 유출률을 초기유량을 이용하여 일야가 제한한 식(Y=aX + b) 으로 산정한 결과 a = 0.0022, b = 0.331 이며 표준편차는 0.013이다 2. 대청댐을 5~100 년의 빈도의 갈수에 대비하여 운영할 경우 홍수가 예상되면 강우 빈도별로 본 연구에서 제시한 유출률 예측식과 표 4-1에 제시한 가변적 제한 수위를 토대로 댐을 운영함으로써 이수 및 치수의 목적 달성을 기대할 수 있다.