감수곡선을 이용한 섬진강댐 유역 유출 예측

김운중,고창옥 朝鮮大學校 建設技術硏究所 2001 建設技術硏究 Vol.21 No.1

The rainfall-runoff in a catchment is predicted by tank model using recession curves. The water tank has a horizontal cross-section area, which is a function of the water depth and which may be determined from the recession curves of flood hydrographs. The rate of runoff and the time lag between rainfall and runoff were determined from rainfall and hydrograph. The model is applied to Sumjindam catchment for predicting flood response to rainfall events. The results found from the model are in good agreement with the observed data. The parameters of the model have physical meanings of the catchment.

Separation of Amylose and Amylopectin in Corn Starch Using Dual-programmed Flow Field-Flow Fractionation

김운중,Chul Hun Eum,임승택,한정아,유상권,이승호 대한화학회 2007 Bulletin of the Korean Chemical Society Vol.28 No.12

黃龍江 水系의 河川形態學的 特性 硏究

金雲中 조선대학교 국토개발연구소 1988 국토개발연구 Vol.8 No.1

The stream morphological characteristics of a watershed have important influence upon the analysis of run off. In this study, the applicability of the Horton's law of stream order, stream number, average stream length, average stream slope, was investigated with the data taken from topographic maps(1 : 25,000) which cover the whole Hwang Ryong River watershed which is one of the first tributaries of Yeong San River. The result showed that the Hwang Ryong River System was developed very closely to the patterns generally described by the laws of Horton.

지표자료와 구름물리를 토대로 한 호우모형의 개선에 관한 연구

김운중,이재형 한국수자원학회 1995 물과 미래(한국수자원학회지) Vol.28 No.6

강수의 물리과정에 입각한 호우모형이 전일권(1994)에 의하여 개발되었다. 본 논문에서 이를 수정하였다. 본는 연구 모형에서 구성한 주요 부분은 포화증기압, 구름두께, 운정기압에 관한 것이다. 기존 모형과 달리 본 연구 모형의 입력자료로써 위성에 의해 측정된 운정기온과 알베도를 사용하였다. 본 연구에서 기존의 포화증기압 방정식보다 현실에 가까운 방정식을 획득하였으며 기존 방정식의 단점을 해결하였다. 또한 운정기온과 운정기압 추정에 사용된 매개변수가 소거되었으며 계산시간도 단축되었다. 본 연구 모형을 전주지점의 호우사상에 적용하여 검증한 결과 모형의 출력인 총강우량과 강우 패턴이 실측치에 잘 부합되었다. The physically based heavy rainfall model developed by Ceon(1994) for storm events is modified in this study. The main parts of this paper are composed of modeling saturation vapor pressure, cloud thickness, cloud top pressure. In a different way from the previous model, cloud top temperature and albedo measured by satellite are used as input data to the model. In this paper, the defect of saturation vapor pressure equation in the previous model was improved. Furthermore, the parameters for temperature and pressure on cloud top are eliminated as well as the time of calculation in the model is decreased. Also, the results show that there are very small gab between the hourly calculated.

수리·통계모형에 의한 설계 갈수량 추정법 개발

김운중,김영균,문수회 朝鮮大學校 建設技術硏究所 2005 建設技術硏究 Vol.25 No.1

The method of a frequency analysis which takes advantage of annual low flow data is extensively used in our country when the design low flow is estimated. It is necessary to secure the measurement record of a long-term in this method and therefore it is not proper to apply this method for cases of measurement record of a short-term or an ungaged outlet. In work-site, generally, the design low flow of unmeasured station is determined by the secondhand method which utilizes the area ratio between the gaging station and the unmeasured station. However, this method using the area ratio is unreal and unreliable because the low flow that is different from the flood flow is affected by the topographical, the geological and the basin characteristics. A new proposal that estimates the design low flow by using the hydraulic-statistical model is made in this paper. A method the return period can be converted into the recession time is derived under an assumption that the dry spell is similar to the low-flow runoffs event. To induce the method(recession time model), two kinds of models are employed; One is the type I extremal value distribution as the dry spell model, and the other is the exponential linear recession equation as the low-flow runoffs model. The climate conditions, the watershed and the runoff characteristics are adopted as the parameters of the recession time model. Meanwhile, a recession model that can estimate the design low flow in the gaging station or the unmeasured station is made by using the results of the recession time model. The initial discharge and the recession constant are used as the parameter of the recession model. The present model derived from this study is applied into the outlet basin of Yongdam gaging station, and the estimated design low flow for the return period of 10 year is obtained as 2.14m3/sec which corresponds to 97% of standard low flow (2.22m3/sec). Resultantlv, it is concluded that the present model proposed in this paper can be effectively used as the alternative for estimation of the design low flow.

Isiguro 特性係數에 의한 確率 降雨强度式에 관한 硏究(Ⅰ) : 海南, 莞島地方을 中心으로 on the Haenam, Wando district

金雲中,表永平 조선대학교 국토개발연구소 1995 국토개발연구 Vol.15 No.1

This study has for the object to extract the rainfall intensity lasting for 10 minutes, 60 minutes and we applied to this study the Isiguro characteristic coefficient value which is simple in calculation and is high in application in order to induce the Rainfall intensity formula of south-west seacost, Haenam, Wando districts of Korea and then it was induced with three formula(Talbot, Sherman, Japanese) and comparatively analyzed again by the mean square root error. We would propose the Sherman method with the least error for the suitability in these districts. This formula will be the most economical and reasonable plan in making drainage plan in the Haenam, Wando districts.

QUAL2E 모형을 통한 탐진강 유역의 수질예측에 관한 연구

김운중,김영균 朝鮮大學校 建設技術硏究所 2003 建設技術硏究 Vol.23 No.1

In recent years, the river management is being more and more important because water quality become worse and water demand increase. So, there are many points which is demanded as followings : Water supplement of food quality, plan for a water quality preservation, water quality purity and river management. Especially, important of river management is focus on to pretect the river which is more clean and natural. Tamjin Dam has been under constructing for the purpose of efficient using of water because there is need of water supply to the adjacent Tamjin river basin whose living standard is developed. The purpose of this study is to prospect of the influences to the water quality and the change of the qater quality of Tamjin river in future, after completion of the dam construction in 2003. In this study, the reason why we decide the place which is from the dam, now under construction, to down stream as a target region is to prospect to the water condition as the dam is constructed and to make an alternative method to improve the water condition. QUAL2E is chosen because it has the good reputation for the reliability of test of water puality in the world. 2011 was selected as a target year This study prospected the management for water quality on dam reservoir, the water quality of river by release discharge and the change of the water quality according to decreasing of contaminations which is made by basic environmental facilities.

대청댐 유역의 호우 거동 특성에 관한 연구

김운중,고창옥 朝鮮大學校 建設技術硏究所 2002 建設技術硏究 Vol.22 No.1

The storm movement influences the shape of the runoff hydro-graph. The recent development of distributed and semi-distributed model for the conversion of rainfall in to runoff has renewed the interest in problems related to moving storms. One of these is the determination of the speed and direction of storm movement from field data. The speed and direction of movement of rainfall patterns, assumed constant during and given storm, can be derived data sets comprised of the coordinates (x. y) of a number of the recorded hyetographs. Since rainfall hyetographs at different stations are not identical, it is necessary to select some easily identified feature of the hyetograph as a basis for determining the time of arrival of rainfall at the various gauges. In this study, the analysis technique based on the corrected three stations method. The method takes data from a network of continuously recording rain-gauges and is based on minimizing the sum of the squared deviations between the observed arrival times T for the rain-gauges and values t computed by the equation of the inclined plane. In the method, the value were taken by three values of times of arrival for each station and for each storm. The three features used for the definition of arrival times are T_(c) the time to the centroid of the hyetograph, T_(m), the time to the median (50%) of the hyetograph, and T_(p) the time of highest rainfall intensity. The modern rainfall input should be based on the recognition of rainfall kinematics and it should contain the movement parameters. The, parameters must be extracted from the rainfall data or taken from other phenomena such as wind movement at high altitude. It is estimated for the speed and direction of the moving storm in the Daechong dam catchment. The relationship between storm and high-altitude wind, movement parameters is estimated. The results show that the relationship between the direction of storm S_(d) and the direction of wind W_(d) is S_(d)= 22.558 + 0.919. W_(d) and the relationship between the speed of wind W_(s) and the speed of storm S_(s) is S_(s)=6.526 + 0.612. W_(s).

해남간척지구의 설계홍수량 및 배수갑문 규모 결정

김운중,민병무 朝鮮大學校 建設技術硏究所 2000 建設技術硏究 Vol.20 No.1

The purpose of this study was to investigate the propriety of the design flood and drainage sluice gate sizes of Haenam Land Reclamation Project, which was designed in 1982, considering variation of rainfall size with spatial and time varying. This project area is located in southwest sea-shore of Korea, where their precipitation gauge network is not denser than any other area of Korea and the fluctuation of rainfall with respect to space is greatest in Korea. And also, this area is lain adjacent to Mokpo city whose precipitation gauge records was implemented in that project design. This rarity of precipitation gauge network may cause significant mistakes in calculating design rainfall and flood sizes. In order to consider the variation of rainfall the annual maximum 2-day rainfall series of 1907~1999 of Mokpo precipitation guage as well as of 1972~1999 of Haenam precipitation guage were collected and analyzed. In evaluating design flood and sluice gate sizes the same methods of rainfall frequency analysis, calculation of frequency flood size, inundation analysis, and sluice gate capability analysis, which were applied in original design of that project, were adapted in order to compare under the same condition and consider the variation of rainfall only. In addition, the sensitivity analysis of the triangular unit hydrograph method, which has been applied to calculate flood hydrograph for the most part of land reclamation design in Korea, With respect to runoff curve number(CN) and time of concentration which are dominant parameters in this method. And the results of sluice gate size of this study were compared kith original design size and that size from experimental formula so as to examine the appropriateness of experimental sluice gate size formula. The result showed that in the case of considering spatial rainfall variation the design rainfall and peak flood sizes were underestimated as 1.67 and 1.84 times of this study respectively. On the other hand, in the case of considering rainfall variation with time both of the design rainfall and peak flood sizes were overestimated as 1.02 times of this study. From these results we can infer that there was no significant rainfall fluctuation with time in southwest coastal area of Korea but this area has outstanding rainfall fluctuation according to space, therefore one must consider the spatial rainfall variation in their hydrological design about southwest area of Korea.

全北地方 主要 地域別 最適 確率降雨强度公式의 誘導

金雲中,金哲淳,林炳大 조선대학교 국토개발연구소 1990 국토개발연구 Vol.10 No.1

This study places emphasis on invastigation each average rainfall record of the period of twenty years on the main districts (Jeon Ju, I Li, Goon San) of Jeon Buk, and extracting the actually measured amount of consistent rainfall per minute (10, 20, 30, 40, 60, 80, 100, 120, 180, 240, 300, 360 and 720 minutes). In order to study this thesis, the calculation of probability rainfall amount selected five method (Formality distribution, Logarithm formality distribution, Moment, Gumbelchow and Iwai), and four apropriate types (Talbot, Sherman, Japanese and Semi-log types) for a Korean rainfall characteristic among various types are selected, the induction of optimal rainfall intensity formula is computerized, and labor saving and technical improvement is designed. They are as follows. 1. Fit extent of optimal probability rainfall intensity at each Jeon Buk district appeared to be Jeon Ju 94.8%, I Li 94.9%, Goon San 96.2%. 2. Logarithm formality distribution method is suited to Jeon Ju and I Li, and formality, Gumbel-chow and Iwai method is suited to Goon San. 3. I Li and Goon San district used to do existing formula of probability rainfall intensity in Jeon Ju now, but new decisive formula in this thesis proper to practical use. 4. The average fit extent of this study's formulas appeared more high than the existing formula.