耽津江 水系의 流量曲線式 開發

金雲中,鄭南先 朝鮮大學校 建設技術硏究所 1998 建設技術硏究 Vol.18 No.2

We have a lot of loss of lives with the economic damages due to the localized downpour on the seasonal characteristic of the Korea peninsular. In addition, as the cultivation area of crops for special use has been increased and the use of land including agricultural and industrial complex facilities has been advanced, a great deal of water consumption is expected continuously and then water for drinking, agriculture and industry should be reserved. So for the advanced use of water resource, Korea Water Resources Corporation plans to supply the water with neighboring regions by constructing Tamjin Dam at Janghung-Kun, Chonnam. This study measures discharge with current-meter and bar-buoys, the amount of water inflow into Bongsan region where is upper stream of Tamjin Dam, develops rating-curve which will be the basic material in planning the quantity of discharge from Jangsan region, the down stream of the Dam and then it is expected that it will contribute to the effective management and operation of water resources.

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.

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.

가동보 설치에 따른 하상변동 예측에 관한 연구

김운중,문수회,김영균,민병무 朝鮮大學校 建設技術硏究所 2007 建設技術硏究 Vol.27 No.1

To estimate the change of riverbed geography by the operation of movable weir, two-dimensional RMA-2 and SED-2D were used in this study. Hydraulic elements like flowrate or depth were simulated by RMA-2 and the change of riverbed geography according to sediment transport was simulated by SED-2D. Suktop stream was chosen as a project river for the simulation. Under the condition of 50-year rainfall frequency, the estimated flood of Suktop was 123cms. At the points of movable weir the simulation results showed that the difference of high water level from the result of HEC-RAS was less than 0.64m. And the difference of water velocity was less than 0.21m/sec. Based on the sediment simulation by SED-2D, predicted riverbed elevation was 29.70-30.22m at the point of ST1 and 28.26~28.82m at the point of ST2. Measured riverbed elevation was 29.70-30.16m, 28.28-28.69m, respectively. So, the predicted elevations are closely similar to the measured elevation. At the point of ST1, sediment transport simulation results showed that erosion of riverbed was predicted by the operation of movable weir. This erosion was ranged up to 200m upstream and the riverbed would be eroded away as much as 0.07m for one year. At the point of ST2, upstream of movable weir would be eroded and the erosion depth was estimated 0.261m. The erosion was higher at the point of movable weir and the erosion depth was estimated 0.310m. But the sediment would be deposit downstream of the movable weir. SED-2D followed by RMA-2 is well applicable to the stream which has movable weirs and can estimate not only hydraulic parameters such as flowrate or depth but also riverbed elevation change caused by erosion or deposit of fluvial sediment.

榮山江 유역의 洪水被害潛在能 산정

김운중,민병무 朝鮮大學校 建設技術硏究所 2007 建設技術硏究 Vol.27 No.1

In this study the potential flood damagef (PFD) of Young-San river basin is analysed on 32 sub regions divided by the tributary characteristics of the whole basin. The analysis of PFD is based on the factors about the possibilities, the potentials of flood events and the weakness of protection facilities. PFD is proposed for the establishment of the degree of safety for flood protection and is applied for the investment schedule of flood protection facilities. The results of this study on PFD could be used for deciding the priorities of the each flood protection plans and for flood management of the river basin.

시·공간 강우변동을 고려한 설계홍수량과 배수갑문 규모 결정 : 해남 간척지구를 중심으로

김운중,민병무 圓光大學校 環境建設硏究所 2000 環境建設論文集 Vol.9 No.-

The purpose of this study was to investigate the propriety of the design flood and drainage sluice gate sizes of Haenam Sand 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 reclamationdesign 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 with 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 size were overestimated as 1.02 times of this study. From these result we can infer that there was no significant rainfall fluctuation with time in southwest costal area of Korea but this area has outstanding rainfall fluctuation according to space, therefore one must consider the spatial rainfall variation in their hydrological according to space, therefore one must consider the spatial rainfall variation in their hydrological design about southwest area of Korea.

長城댐 流域의 水文學的 特性에 관한 硏究

金雲中 조선대학교 국토개발연구소 1989 국토개발연구 Vol.9 No.1

There are various theories about the relationship between precipitation and run-off water, the basis of water control, but this study is an attempt to discover appropiate water control measures based on caculations from the run-off rate of water by the observed amount of precipitation, stored water, intake water, and the overflowing water of waterways. The results are as follows; 1. Average annual rainfall depth of Jang Sung Dam drainage basin is 23.5% more than of Korea. 2. Between rainfall depth and runoff ratio is few relation because of physiographic and climate factors, therefore it is difficult that we infer runoff ratio from rainfall depth. 3. Runoff ratio on the continous rainfall above 10㎜ appeared correlation coefficient γ=0.7062.

통합여수시의 송·배수관로 최적설계에 관한 연구

김운중,천춘길,김영균 朝鮮大學校 建設技術硏究所 1999 建設技術硏究 Vol.19 No.2

This study provides the economical plan of transmission and distribution line in order to make the most effect investment to the waterworks for the stabilized water supply. When it come down to the planning of pipeline, it is profitable that the pipe line is located on-the center of the demand area with considering surveying of roads. And the result of the evaluation indicates that high-impact pipe, ductile cast iron pipe and steel pipe are the most desirable pipes. In the designing of the pipeline, the diameter should be selected with considering of the regional condition and water consumption. It was found that the variation of maintenance-cost with increasing of pumping and electric supply is more important factor of the total-cost that the variation of construction-cost. The strategy of system for the stabilized water supply must be based on the double conveying pipe line, the searching for the headwaters, the use of recycling water at wastewater treatment plant, the improvement of the decrepit waterworks and system development and automation plan.

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.

탐진강 유역의 유출량과 오염부하량의 상관관계 분석

김운중 朝鮮大學校 建設技術硏究所 2004 建設技術硏究 Vol.24 No.2

This research was conducted with the aim of efficiently managing large scale rivers such like Tamjin-river through predicting water quality change with analyzing the characteristics of the flowing in nutrients and pollutants. The main result outcome will be used as basic data for effectively operating reservoirs through controling water quality and quantity. The relationship between quantity of flow and water quality was analyzed and pollution loading into the basin was estimated. Flow and water quality are measured simultaneously. The correlation between quantity of discharge and pollution concentration and between quantity of discharge and pollution loading were analyzed by statistical method, respectively. We provided a rating curve through measuring quantity of discharge(collectirig quantity of discharge) and pollutograph and pollution loading curve through water quality data. Also, we analyzed the correlation between quality of discharge per unit area and pollution loading per unit area in each basin. As of the research outcome, Bong-duck spot revealed an excellent first grade water quality for the items including BOD_(5), DO, and SS. The correlation coefficient between Bong-duck spot's quantity of discharge and pollution loading was 0.988, showing the validity of analysis applying correlation curve formula of quantity of discharge and pollution loading in the same spot.