配水管綱의 非線形 解釋

池洪基,朴埼鎬 嶺南大學校 工業技術硏究所 1993 工業技術硏究所論文集 Vol.21 No.2

This study deals with the analysis of pipe networks. The analysis of pipe network is normally done by computer programming. And the system are composed of as follows; elements, the pipes, connected with specified number of nodes. The pipe network system should be solved for the network system's solution. The element level, head losses for each elements are calculated from the head losses. From this process, the network solutions are completed. The critical step in this analysis is the determination of individual element behaviour. For this the method which is based on the Hazen-Williams formula and used Newton-Rapson technique is chosen. This non-linear analysis leads precise results.

配水管網의 線形 解析

池洪基,朴埼鎬 嶺南大學校 環境問題硏究所 1994 環境硏究 Vol.13 No.2

본 硏究는 컴퓨터 프로그램에 의한 最適 管網解析에 필요한 알고리즘을 개발하는데 目的을 두고 있으며, 管網解析을 위한 시스템의 구성은 節點의 수와 각 節點에 따른 要素로 구성되어 있다. 한편 본 硏究에서는 管網시스템을 線形解析으로 適用·分析하였으며, 그 결과 線形解析 技法으로서 Hazen-Williams 式에 의한 Newton-Rapson 方法의 線形解析 알고리즘이 보다 精密하고 신속한 解를 얻을 수 있었다. This study deals with the analysis of pipe networks. The analysis of pipe network is normally done by computer programming. And the systems are composed of as follows ; elements, the pipes, connected with specified number of nodes. The pipe network system should be solved for the network systems solution. The element level, head losses for each elements are calculated from the head losses. From this process, the network solutions are completed. The critical step in this analysis is the determination of individual element behaviour. For this the method which is based on the Hazen-Williams formula and used Newton-Rapson technique is chosen. This linear analysis leads precise results.

Dynamic Wave 模型에 의한 河川流域의 河道追跡

池洪基,朴琦鎬 嶺南大學校 環境問題硏究所 1993 環境硏究 Vol.13 No.1

본 硏究에서는 河川流域의 流出過程의 解析 및 그 豫測을 위해서 水理學的 流域追跡模型을 적용하여 流域의 洪水 流出量을 算定할 수 있는 豫測模型의 알고리즘 및 그 프로그램의 개발을 目的으로 하고 있다. 이때 사용된 河道追跡模型은 DWOPER 模型이며 이와 결합되어 流域流出量의 算定을 위하여 본 연구에서 개발된 槪念的 模型이 사용되었다. 槪念的 模型에서 계산된 流出量을 DWOPER 模型에 적용시킨 結果에 대해서 그 적합성을 實測資料와 比較 分析한 結果, 水文曲線의 上昇部, 尖頭部에서 거의 접근된 河道追跡이 일어나므로 河道追跡이 비교적 잘 수행됨을 알 수 있다. 한편 河道追跡 模型의 원할한 수행을 위하여 加重 Factor θ와 誤差의 허용치ε의 적절한 범위를 구하여 비교적 안정된 解를 구할 수 있었다. The purpose of this study is development of channel routing model which can be used for flood forecasting. In routing model, the hydrulic technique of the implicit scheme in the dynamic equation is chosen to route the unsteady varied flow. The channel routing model is watershed runoff which computed by both conceptual and transfer function model. The comparative study shows that both the conceptual and transfer function model can simulate the watershed runoff accurately. As a result of investigating the channel routing model, the optimal weighting factor θwhich fixes two points between time line is selected. And also, the optimal error tolelence which satisfies computing time and converge of solution is chosen.

槪念的모델에 의한 河川流出豫測 : -HBV 모델 및 Tank 모델을 中心으로-

池洪基 영남대학교 공업기술연구소 1989 연구보고 Vol.17 No.1

The purpose of this study is to develop a conceptual model to forecast streamflow which is a part of hydrologic cycle process occurring in a river basin and puts it in practice. This model is a time-variant system that soil moistues condition shows dynamic behavior in rainfall-runoff process, and model parameter reflecting soil moisture condition is expressed by the function of Antecedent Precipitation Index(API). The types of API used in model parameter estimation are reciprocal type and exponential type, and the result of simulation shows that reciprocal type is superior to exponential type. Consequently, the conceptual model which expresses the behavior of soil moisture condition by the function of API(reciprocal type), is a very useful model in streamflow forecast.

개수로에서 곡선부의 수위변화 특성(1)

池洪基,鄭光玉,李舜鐸 嶺南大學校 工業技術硏究所 1995 工業技術硏究所論文集 Vol.23 No.2

In order to enhance capacity of flood control in a design of open channel, it is desirable to design as a straight-course type except the curved channel that is inevitable. The flow in a curved channel is composed of the secondary flow and the hydraulic jump in case of supercritical flow, also cause the energy loss in the curved channel in case of subcritical flow. Therefor, the hydraulical analysis of a velocity distribution and the water level variation can be applied to prevent the overflow in a curved channel during a flood. The objectives of this research is the analysis of the flow characteristics in a curved channel based on the simulated channel.

實驗水路에 대한 數値的 흐름追跡

池洪基 嶺南大學校 環境問題硏究所 1990 環境硏究 Vol.9 No.2

This study has been aimed at the development of the models for experimental channel routing by analytical method and measuring by experimental method. In the analytical routing method, the implicit scheme was chosen. In the experimental method, the flow procedure was measured and compared with result of analytical routing method. The experimental channel consists of tilting channel which was attached water height meter and personal computer which calculates input data. The channel routing by implicit scheme was found to be similar to the experimental value. While investigating the characteristics of these experimental measuring system, it was concluded that combined personal computer system is expeditious and accurate for correcting and control the data. It is also available for the strage and manage the data.

생활용수 공급을 위한 우수집수 시스템

전인배,지홍기 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 is to improve inefficient use of rainwater in islands where it is use rainwater to supply the domestic water and to propose rainwater harvesting system that is most appropriate to the characteristics of precipitation in Korea. To accomplish this purposes, Cheju island was chosen as an study area and the design for the roof area and tank size of rainwater harvesting system was based on the result of the simulation done with the actual precipitation and domestic water use data. The theory of Runs was used in this analysis to design a stable rainwater harvesting system and for economic purpose, public rainwater harvesting system operated with private rainwater harvesting system at once. Since the result of the analysis indicated that the designed rainwater harvesting system was operated stably in Cheju island, the same result is expected in other island too. Therefore, if this system is executed together with the roof rehabilitation work of island area, it will bring positive effects on both the improvement of residential environment and the security of domestic water.

유량측정기법에 관한 연구 : 실험수로에서 희석법을 중심으로 Dilution Method in Experimental Channel

김성원,지홍기,이순탁 嶺南大學校 環境問題硏究所 1996 環境硏究 Vol.16 No.1

실험수로에서 희석법을 이용한 유량측정의 기법은 일정량주입법과 일시주입법으로 나누어 진다. 본 연구에서는 일정량주입법에 의한 유량측정 결과치가 일시주입법보다 좀 더 실험유량값에 근접한 것으로 분석되었고, 만약 측정장치의 설치오차, 주입용액의 완전 혼합오차와 농도 측정오차 등을 최소로 한다면, 실험수로에서의 유량측정에 있어서 보다 정확한 유량측정을 할 수 있을 것이다. 이와같은 연구분석의 결과로서, 유속계를 사용할 수 없는 하천유역이나 다른수로에서는 희석법을 이용한 유량측정기법이 적용되어 높은 정밀도를 구할 수 있다고 고려된다. It is divided into constant-rate injection method and sudden-injection method in the technique of discharge measurement using the dilution method for experimental channel. It is analyzied that the value of constant-rate injection method is approached more exact than that of sudden-injection method in this research. In this study, if it is minimized for the exact installation error of the testing equipment, the perfect mixing error of the injection-solution and concentration measurement error and so on, It is measured the more exact discharge in this experimental channel. It is considered that the dilution method is applied for the river basin which in not used the current meter and another channel in this research.

효율적 우수이용을 위한 초기우수의 수질변화

이창수,지홍기 한국환경과학회 2003 한국환경과학회지 Vol.12 No.3

A water quality analysis of rainwater collected from catchment equipment(2m×1m) was conducted to determine its suitability for domestic purposes, in this study. As the results of analysis, the pH of rainwater was 6.3±0.3, and the turbidity of rainwater was over the 5 times than drinking water guidelines. For the usage of rainwater as the domestic and drinking water, the rainwater is need to treat. The analysis value of BOD was about 3 ㎎/L and the values of heavy metal as the Pb, Cd, Fe, Mn, Cr_6 and Cu was satisfied with drinking guidelines. Overall results of analysis support the possibility of rainwater as the domestic and drinking water.

신뢰성 기준을 적용한 용수공급능력의 해석 : 낙동강유역을 중심으로 for the Nakdong River Basin

차상화,지홍기,이순탁 한국환경과학회 2002 한국환경과학회지 Vol.11 No.12

In general, the evaluation of water supply capacity is important factor to establish various establishment of water resource supply plan include water resource security and determination of dam's mass. But former researchs about estimation of water supply capacity were lack in continunity of evaluation basis, and didn't excute analysis on reliability criteria also. In this study, Nakdong river was selected for study basin, and then water supply capacity was analyzed by HEC-5 model using indentical reliability criteria.