제1형 고실성형술시 측두근막 삽입 위치에 따른 청력 변화의 단기 추적 결과

전일권,조재현,정정래,송용진,조창건,이재진,방진현,박선태 대한이비인후과학회 2003 대한이비인후과학회지 두경부외과학 Vol.46 No.7

동화지구 수문특성 변화

전일권,정재성 전남도립대학교 2004 전남도립대학교 논문집 Vol.6 No.-

As basis research of hydrological redesign of Donghwa dam. hydrological design amount change was estimated before dam plan and after plan. The probability rainfall. PMP and probability flood amount are estimated and the change was analyzed. The amount of 200 year frequency probability rainfall with 1 day duration was 351.1 mm. witch is 2.5% increased more than first design value and the PMP was 780.2mm. The timedistribution of design rainfall examined applying Construction and Transportation Ministry IDF. Mononobe. Huff and United States of America NWS method. As a result. to secure safety from flood damage. Mononobe method should be selected. The design flood amount did 8.0% increase by 674㎥/s in 623 m% at the first design in case of frequency 200 years. The monthly peck probability flood amount is 414㎥/s in June. 480㎥/s in July. 588㎥/s in August. 404㎥/s in September

상수관망에서 염소 투여량 결정에 관한 연구

전일권,박병화 전남도립대학교 2000 전남도립대학교 논문집 Vol.3 No.-

In recent years, interest about water quality change is increasing in water distribution networks to secure safety of drinking water. Main factor about water quality decline is following things in water distribution networks; 1) Microbial infiltration and re-growth by water leakage of water distribution networks, 2)Affluence of pollution, corrosion of networks etc.. In water distribution networks, residual chlorine of 0.2 - 0.4㎎/L relationship should be kept effectively. For this, detailed comprehension of physical-chemical behavior about chlorine decay is required in water distribution networks. In this paper, the estimate model of chlorine decay is developed in water distribution networks. The parameters of model are length of networks from water treatment to domestic, concentration of initial chlorine, water temperature, concentration of zinc and manganese etc .. The parameters of estimate model eva1uated using Hook’s algorithm hat is optimization algorithm.

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 하구의 기수역 설정에 관한 연구

전일권,이용환 전남도립대학교 2007 전남도립대학교 논문집 Vol.10 No.-

The Sumjin river estuary’s salt content density change experimented by RMA-4 model. The salt content density change analyzed on the basis of experiment result and data that measure. While arrive at ebb tide in the whole court on the basis of result and spot inquiry that measure salinity, the Sumjin river downstream’s brackish water zone upper limit is assumed formed between the Sumjin bridge and the Da-ap middle school. According to experiment result, transmission extent of salt water invasion according to inflow discharge and the Kwangyang bay’s sea water level of the Sumjin river estury’s salt content density changes greatly. Therefore, it is unreasonableness that decide specification section by the brackish water zone relationship border. The Sumjin river estuary’s brackish water zone is influenced in the Songjung station inflow. In case inflow of this point is the yearly mean, brackish water zone relationship upper limit in the Sumgin bridge downstream 5km (l0km from estuary), minimum stream flow case, brackish water zone relationship upper limit is assumed by old daap intake port upper stream about 2km (23km from estuary).

수위-유량 관계곡선 개발에 관한 연구

전일권 전남도립대학교 1999 전남도립대학교 논문집 Vol.S No.-

The purpose of this paper is to build a more available rating curve for predict of flood at major hydraulic control station. All the past observed discharge data require to building proper rating curve at the station. In this paper, object station select Sangchi and Kwanchon for development of rating curve. The field observation data at Sangchi and Kwanchon carried from 1993 to 1998. In this paper, it is emphasized that the rating curve is subject to water surface slope(WSE). WSE is estimated by the based of Manning equation. The selection standard of rating curve is root mean square error between observation data and estimated value by rating curve equation. It is found that rating curve of Kwanchon station have an influence of WSE. Therefore, the development of two rating curve is useful for predict of flood of Kwanchon station.

광양만 해류 이동 특성

전일권 전남도립대학교 2009 전남도립대학교 논문집 Vol.11 No.-

Analyzed using seawater flow characteristics RMA-2 model about the Gwangyang bay development before and after sea area. The result is as following. The Gwangyang bay velocity of flow is superior more than tide flood current in ebb tide current. If compare with development before, velocity of flow decreases in the Gwangyang bay most area after development. The spring tided case , water level increases to flood tide by sea area reduction and becomes low to low tide in the Taeindo(P1 point). But, tide level in sea area becomes low to flood tide and rise to low tide among others. And generally, flood tide’s range of tide is decrescent. Some tide level rise to flood tide and tide level to low tide descend some in P3 to low tide. Tide level is decrescent to flood tide and rise to low tide in other area among others. Generally, range of tide is decrescent. When is low tide, tide level rises to flood tide and tide level descends to low tide at P3 point. The Gwangyang bay relationship other area is decrescent tide level to flood tid and tide level rises to low tide. When is the spring tide , tide level reduces flood tide and all low tides after development in P2~P5 point. But, there is no change at P6 point and tide level increases to flood tide and low tide after development at P1 point.

소규모 농업용 댐에서 PMF 산정

전일권 전남도립대학교 2003 전남도립대학교 논문집 Vol.5 No.-

PMF hydrograph was estimated in Donghwadam for agriculture. This is thing to acquire dam operation method to minimize flood damage in case extreme heavy rainfall flows in. Selected 24 hours that PMP’ s duration time uses mainly in small scale dam for agriculture to look for time distribution of proper rainfall to small scale dam for agriculture. PMF' s time distribution was analyzed by Huff, Mononobe, Ministry of Construction & Transportation IDF and NWS method. The probability flood of return period 200 years' is estimated by rainfall distribution method. The results was IDF(714.0㎥/s) > Mononobe(673.6㎥/s) > NWS (528.2㎥/s) > Huff(342.1㎥/s). The estemated PMF by same method is Mononobe(l,636.9㎥/s) > IDF(l,548.2㎥/s) > NWS(1,216.3㎥/s) > Huff(828.3㎥/s). When see as preceding results, design flood of return period 200 years is judged that it is reasonable that calculate by Mononobe method for dam safety. But, PMF is calculated overmuch Mononobe or IDF method. Therefore, attention of use of these method is required in small scale dam for agriculture.

수문곡선의 감수상수에 관한 연구

전일권 전남도립대학교 2000 전남도립대학교 논문집 Vol.2 No.-

The present day, interest in low flow has been increased because of the increase in water requirement and the deterioration in water quality. And the design low flow statistics is important in the water resource management aspect. The purpose of this paper is to estimated for recession constant of low flow. The methods for calculating a recession constant are graphical and numerical method. The graphical methods have many errors. Besides, the methods need for much time to estimate. The objective methods for recession constant estimate are suggested. These methods are least square method, the Vogel and Kroll method and Brownlee method. At the Sum-jin dam watershed, the recession constants are established by these methods and analyzed by root mean square errors of between observations and calculated values. The result show that the Vogel and Kroll method prove the best method for estimating the recession constant at Sum-jin dam watershed.

미계측 유역의 갈수량 추정

전일권,조기태 전남도립대학교 2000 전남도립대학교 논문집 Vol.4 No.-

Due to the problem in the limiting water resources development, the large deterioration of water quality and destruction of ecosystem preservation, interest on the low-flow has been increased. Also important to determine of low-flow in the water resource management. The purpose of this study is low-flow estimation of the ungaged watershed. In this study, the formulation for the estimation of the low-flow is obtained by the means of the stream-aquifer hydraulic approach, which is applied to a mountainous watershed. Independent variables associated with the low-flow are the watershed area, the average basin slope, the base f10w recession constant and the volume of pores. In this independent variables, the watershed area is measured from 1:25,000 scale topographic maps and the average basin slope is estimated by Strahler’'s method. And the base flow recession constant is computed by Vogel and Kroll’'s method. The recession constant at the ungaged sites is estimated by this study proposed method. The regional formula to estimate the low-flow at the ungaged point is proposed. 우리나라의 수자원 정책은 이수 및 치수에 치중되어 왔다. 그 결과 하상계수가 다소 낮아 지고 유황이 일부 개선되었으나 다소 소외되었던 갈수기의 용수부족, 수자원 개발의 한계,생태계의 보전 등 하천 환경 문제 등이 중요한 문제로 대두되고 있다. 우리나라는 아직까지 설계 수문량에 대한 기준이 체계적으로 구축되어 있지 않을 뿐만 아니라, 구축되어 있는 수문자료의 신뢰성 또한 매우 떨어진다. 갈수기 수문분석에 이러한 문제점을 극복하기 위하여 수문분석은 면적 비율법이나 평균 유출고법 등에 의존하고 있다. 그러나 이러한 방법들은 유역간의 수문학적 동질성올 가정하여 수문량을 추정한 것이기 때문에 현실성이 없다. 특히 유역의 지형 및 지질 등 유역특성에 따라 갈수기 특성이 크게 변화하므로 추정한 수문량의 신뢰도는 매우 낮다. 따라서 본 연구애서는 이러한 문제점을 개선하기 위하여 미계측 하천 유역을 대상으로 대상유역의 지형,지질 등을 고려한 현실성 있고,신뢰성 있는 갈수량 추정 모형을 개발하고자 한다.