Hec-GeoHMS 모형에 의한 설계 홍수량 산정

김선주,김필식,윤찬영 建國大學校附設農業資源開發硏究所 2002 農資源開發論集 Vol.24 No.-

As a result of the recent flood crisis, calculation of effective design flood becomes important. The main objective of this study is to simulate design flood of the Seongjoo watershed using GIS(Geographical Information System) and HEC-HMS. Parameters of Seongjoo watershed were extracted by using GIS technique. Time of concentration was estimated Kraven(1∼4 sub-basin), Riziha(5, 6 sub-basin) formulas. The temporal pattern or hyetograph of rainfall can make a significant effect on the peak value and shape of hydrograph, and Yen-Chow, Huff, Keifer-Chu method were applied for this study. This rainfall distribution type could be considered to calculate designed flood. In case that sub-basin was divided, design flood tend to be calculated smaller by storage and retardation of river channel routing. From the result of the runoff rate of 3rd in Huff's 4th quantiles method, the peak runoff rate was magnified by the constant rate when duration increased. 15hr was suggested as an optimal duration time of Seongjoo watershed.

소규모 댐의 효율적 저수관리 모형 개발

김필식 ( Kim Phil Shik ),김선주 ( Kim Sun Joo ) 한국농공학회 2004 한국농공학회 학술대회초록집 Vol.2004 No.-

1. 소규모댐의 효율적인 운영을 위하여 저수관리 모형(STMM)을 개발하였다. STMM은 유역 물수지 모형, 홍수기와 평수기 저수관리 모형으로 구성되어 있으며, 현장에서 쉽게 사용할 수 있도록 Windows용 프로그램으로 개발하여 user interface를 손쉽게 구현할 수 있는 장점이 있다. 2. 유전자 알고리즘을 사용하여 평수기와 홍수기 저수관리 모형을 위한 유출 모형의 매개변수를 최적화 하였다. 3. 적용 결과 연유입량은 전국적인 가뭄이 발생한 2001년을 제외하고 평균 114,720.000m³로 60.3%의 유출율을 나타냈다. 모형의 효율성은 평균 0.78, 결정계수는 1999년을 제외하고 평균 0.8 보다 크게 나타났다. 그러나 상대오차는 일별 평균 17%, 월별, 년별 평균은 13%, 5%로 나타났다. 4. 홍수유출모형을 성주유역에 적용한 결과 홍수피해를 발생한 태풍 '루사'와 '매미'의 경우 모형의 효율성이 각 0.88, 0.87로 양호한 결과가 나타났다. 태풍 RUSA의 경우 첨두홍수량이 약 1,360m³/s로 설계홍수량 1,178m³/s 보다 약 182m³/s 가 큰 홍수량으로 댐 상 · 하류에 홍수피해가 발생하였다. 5. Modified Rigid ROM을 적용한 결과 하류부의 피해는 발생하지 않으나, 강우 500mm, 제한수위 EL. 180m부터 댐 표고 EL. 191.5m를 초과하는 것으로 나타났다. 성주댐 관리상 하계만수위를 기준으로 할 경우 강우 300mm에서도 홍수피해가 발생하였다. 따라서 이상의 결과는 댐 관리의 효율성을 최대한 중대하였다고 판단된다. 이상의 결과를 바탕으로 본 연구에서 개발된 저수관리 모형은 소규모 댐의 효율적 관리를 위해 적용이 가능하다고 판단된다. Korea has a total of 1800 dams, and 1,114 of them, 92%, are small dams, Generally, small dams have no flood control function since they are primarily designed for supplying irrigation water. Since the operation standard has not been established for small dams, unlike the large dams. In addition, the recent unusual weather patterns, changes in land uses, and the diversity of agricultural water uses have drastically increased the level of damages. The purpose of this study is to develope storage management model(STMM) for irrigation dams that occupy the largest portion of the small dams in Korea. The proposed STMM can be applied to small dams for efficient management. Besides, the operation standard is capable of analyzing additional available water, considering the water demand and the supply conditions of watershed realistically. And the model can improve the flood control capacity and water utilization efficiency by the flexible operation of storage space. Consequently, if the small dams are managed by the proposed STMM, it is possible to maximize water resources securance and minimize drought and flood damages.

유휴농지를 이용한 수질관리방안 연구

김형중 ( Kim Hyung-joong ),안열 ( An Yeul ),김선주 ( Kim Sun-joo ),김필식 ( Kim Phil-shik ) 한국농공학회 2005 한국농공학회 학술대회초록집 Vol.2005 No.-

Fallow paddy has been increased in disadvantageous farming condition area because of importation of foreign agricultural products, labor cost and the imbalance between farming cost and agricultural products price since 1990. The fallow paddy that has gradually increased needs to be prevented from the devastation by weed breeding for re-cultivation. In this study, two fallow paddies that manage with different water depth from the experimental field were selected for observation, and analysis of water quality, water balance and plant body change. The managed fallow paddy was more effective in water quality purification and plants growth control than non-managed fallow paddy. And the fallow paddy managed with a some degree water depth was the most effective field on weed control.

Address Configuration Module for mSCTP Handover

( Dong Phil Kim ),( Sang Tae Kim ),( Sung Shik ),( Seok Joo Koh ) 한국정보처리학회 2006 한국정보처리학회 학술대회논문집 Vol.13 No.1

This paper proposes a dynamic IP address configuration (DAC) scheme for mSCTP handover, which exploits the information from the link layer to support SCTP handover between heterogeneous access networks. The proposed DAC scheme enables a mobile terminal to automatically add a new IP address in the newly visited region, change the primary path, and delete the old IP address so as to support the mSCTP handover. For experimental analysis of mSCTP handover, we consider the handover scenarios for 3G-BWA and 3G-WLAN over Linux platforms. From experimental results, it is shown that the throughput and handover latency of the mSCTP handover would be affected by the timing of primary-change and the overlapping period.

소규모 댐의 운영기준 및 기법 연구

김필식 ( Kim Phil-shik ),김선주 ( Kim Sun-joo ),이주용 ( Lee Joo-yong ) 한국농공학회 2005 한국농공학회 학술대회초록집 Vol.2005 No.-

The purpose of this study is to established a storage management method and operation standard for irrigation dams occupying the largest portion of small dams using storage management system. The system can be applied to seongju dam for effective management. The storage management method was established considering hydrology simulation and statistical analysis using the system. This method and operation standard are capable of analyzing additional available water, considering the water demand and supply of basin actually. It can improve the flood control capacity and water utilization efficiency by the flexible operation of storage space.

배수갑문 방류시점 및 방류량에 따른 담수호의 수질변화

김선주 ( Kim Sun Joo ),김성준 ( Kim Seong Joon ),김필식 ( Kim Phil Shik ),이창형 ( Lee Chang Hyeong ) 한국농공학회 2003 韓國農工學會誌 : 전원과 자원 Vol.45 No.1

Boryeong Seadike located at southwestern seashore of Korean peninsula completed in 1997. Sluice gate operation can be an important factor to maintain lake water quality and reduce retaining time of pollutants within lake. The lake water quality simulation model, WASPS was adopted and tested to find out proper gate operation timing and discharge amount. From the simulation of sluice gate operation, the results showed that the later the time of discharge for loosing 1 day successively to 6 days, the better the quality of water. Discharge amount showed relatively minor changes of water quality. This means that pollutants flowed into lake from watershed do not have enough time to mix up with deep water when the gate opened at early time. About 3 days delay of discharge caused the dilution effect to stabilize the lake water quality in case of Boryeong freshwater lake.

유역과 담수호를 연계한 담수호 수질관리 시스템 개발 및 적용

김선주 ( Kim Sun Joo ),김성준 ( Kim Seong Joon ),김필식 ( Kim Phil Shik ) 한국농공학회 2002 韓國農工學會誌 : 전원과 자원 Vol.44 No.6

A freshwater lake water quality management system(FLAQUM) was developed to help regional manager for the water quality of a rural basin. The integrated user interface system FLAQUM written in Visual Basic, includes three subsystems such as a database management system, basin pollutant loads simulation model using SWMM model and freshwater lake water quality simulation model using WASP5 model. Pollutant load simulation model was applied to simulate the discharge and pollutant loading from the watershed, and freshwater lake water quality model was applied to analyze the changes in water quality with respect to watershed pollutant loads, and this model could be used in planning to control watershed pollutant source for water quality management. Database management system was constructed fur all input and output data processing, and it can be used to analyze statistical characteristics using constructed data. Results are displayed both graph and text for convenience of user. The results of FLAQUM application to Boryeong freshwater lake showed that the lake was in eutrophic condition. The major contribution of pollution comes from tributary No.1 and No.4, which have a large number of livestock farms. Therefore, water quality management must be focused on appropriate management of the livestock farming in the two breanchs.

개에서 둔부 골관절염의 봉침 치료

김태화 ( Tae Hwa Kim ),김병영 ( Byung Young Kim ),김원배 ( Won Bae Kim ),김광식 ( Kwang Shik Kim ),유건주 ( Jian Zhu Liu ),김덕환 ( Duck Hwan Kim ),( Phil A. M. Rogers ) 한국임상수의학회 2006 한국임상수의학회지 Vol.23 No.2

Clinical Presentation and Outcomes of Middle East Respiratory Syndrome in the Republic of Korea

Choi, Won Suk,Kang, Cheol-In,Kim, Yonjae,Choi, Jae-Phil,Joh, Joon Sung,Shin, Hyoung-Shik,Kim, Gayeon,Peck, Kyong Ran,Chung, Doo Ryeon,Kim, Hye Ok,Song, Sook Hee,Kim, Yang Ree,Sohn, Kyung Mok,Jung, You The Korean Society of Infectious Diseases and Kore 2016 Infection and Chemotherapy Vol.48 No.2

<P><B>Background</B></P><P>From May to July 2015, the Republic of Korea experienced the largest outbreak of Middle East respiratory syndrome (MERS) outside the Arabian Peninsula. A total of 186 patients, including 36 deaths, had been diagnosed with MERS-coronavirus (MERS-CoV) infection as of September 30th, 2015.</P><P><B>Materials and Methods</B></P><P>We obtained information of patients who were confirmed to have MERS-CoV infection. MERS-CoV infection was diagnosed using real-time reverse-transcriptase polymerase chain reaction assay.</P><P><B>Results</B></P><P>The median age of the patients was 55 years (range, 16 to 86). A total of 55.4% of the patients had one or more coexisting medical conditions. The most common symptom was fever (95.2%). At admission, leukopenia (42.6%), thrombocytopenia (46.6%), and elevation of aspartate aminotransferase (42.7%) were observed. Pneumonia was detected in 68.3% of patients at admission and developed in 80.8% during the disease course. Antiviral agents were used for 74.7% of patients. Mechanical ventilation, extracorporeal membrane oxygenation, and convalescent serum were employed for 24.5%, 7.1%, and 3.8% of patients, respectively. Older age, presence of coexisting medical conditions including diabetes or chronic lung disease, presence of dyspnea, hypotension, and leukocytosis at admission, and the use of mechanical ventilation were revealed to be independent predictors of death.</P><P><B>Conclusion</B></P><P>The clinical features of MERS-CoV infection in the Republic of Korea were similar to those of previous outbreaks in the Middle East. However, the overall mortality rate (20.4%) was lower than that in previous reports. Enhanced surveillance and active management of patients during the outbreak may have resulted in improved outcomes.</P>

Application of Water Quality Management System of Freshwater Lake

( Kim Sun-joo ),( Kim Phil-shik ),( Lee Joo-young ) 한국농공학회 2003 韓國農工學會誌 : 전원과 자원 Vol.45 No.7

Lake water quality assessment information is useful to anyone involved in lake management, from lake owners to lake associations. It provides lake water quality criteria, which can improve the ways how to manage out lake resources and how to measure current conditions. It also provides a knowledge base so that the lakes can be protected and restored. Here, the Freshwater Lake Water Quality Management System(FLAQUM) was developed. The results of FLAQUM application by scenario proved that pollutant load at rainfall by the nonpoint sources was much more than normal times at rainfall. From the result of Scenario I (pollutant source increase case), the concentrations of Boryeong freshwater lake were BOD 9.43mg/L, T-N 4.53 mg/L and T-P 0.21 mg/L, respectively, and those values exceed the standard of agricultural water. And in case of Scenario I and II(the present case) excluding Scenario III (pollutant source decrease case), all of T-N and T-P are either mesotrophication or eutrophication, on the other hand when 60% of pollution source is removed, the concentrations of Scenario III were BOD 3.21 mg/L, T-N 0.95 mg/L, T-P 0.11 mg/L, respectively, and which satisfies the standard of agricultural water quality.