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.

고정형 30KW태양광발전시스템 운전특성의 모니터링에 관한 연구

신영식(Young-Shik Shin),차인수(In-Su Cha),최정식(Jeong-Shik Choi),김동묵(Dong-Mook Kim),윤형상(Hyung-Sang Yoon),윤정필(Hyung-Sang Yoon),서장수(Jeong-Phil Yoon) 대한전기학회 2008 대한전기학회 학술대회 논문집 Vol.2008 No.4

본 논문에서는 고정형 30KW태양광발전시스템 운전특성을 해석하고 이론을 바탕으로 실 시스템을 적용 · 운용시 시스템의 운전특성 및 발전량을 비교 분석하였다. 장기적인 일사량 측정 데이터 수집을 통하여 그래프화, 모티터링 시스템에 관한 연구를 살펴보았다.

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.

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.

꾸지뽕나무(Cudrania tricuspidata Bureau)의 총 폴리페놀 함량 및 항산화 활성

이진식(Jin-Shik Lee),한갑조(Gab-Cho Han),한경필(Gyeong-Phil Han),코즈쿠에 노부유키(Kozukue Nobuyuki) 동아시아식생활학회 2007 동아시아식생활학회지 Vol.17 No.5

Inhibitory effect of Se-Yeon-Eum on nicotine- and cigarette smoke extract induced cytotoxicity in human lung fibroblast

Jin Chong-Shik,Kim Mi-Sun,Lee Eun-Hee,Lee Joon-Ho,Lee Jong-Hyun,Moon Su-Jin,Lee Bo-Ra,Jung Kyung-Phil,Li Hong-Yuan Kyung Hee Oriental Medicine Research Center 2002 Oriental pharmacy and experimental medicine Vol.2 No.1

There are over 4,000 different chemicals in cigarette smoke, including nicotine and tar. These compounds influence on lung tissue directly or indirectly. In this study, we have examined whether an aqueous extract of Se-Yeon-Eum (SYE), composed of Oriental medicine that has been known to be effective to symptom by smoking, inhibits nicotine- or cigarette smoke extract (CSE)-induced cytotoxicity in human embryonic lung fibroblast, MRC-9. Assessment of cell viability using 3-(4,5-dimethythiazol-2-yl)-2,5-diphenyltetrazolium bromide colorimetric assay indicated that SYE inhibited not only nicotine-induced cytotoxicity but also CSE-induced cytotoxicity. These results suggest the possibility that the use of SYE may be useful for improvement of many symptoms by smoking.

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.

소규모 댐의 효과적 운영을 위한 저수관리 기법 개발

김필식,김선주,Kim Phil-Shik,Kim Sun-Joo 한국농공학회 2006 한국농공학회논문집 Vol.48 No.2

Large dams are managed with operation standard and flood forecasting systems, while small dams do not have management method generally. Shortage of water resources and natural disasters due to drought and flood raised public concerns for management of small dams. Most of small dams are irrigation dams, which need diversified water uses. However, the lack of systematic management of small dams have caused serious water wastage and increased natural disasters. Storage management method and system were developed to solve these problems in small dams. The system was applied to Seongju dam for effective management. The storage management method was established considering hydrology simulation and statistical analysis using the system. This method can bring additional available water, even in the same conditions of the water demand and the supply conditions of watershed. It can improve the flood control capacity and water utilization efficiency by' the flexible operation of storage space.

소규모 댐의 저수관리 시스템 개발

김필식,김선주,Kim, Phil-Shik,Kim, Sun-Joo 한국농공학회 2005 한국농공학회논문집 Vol.47 No.3

Ninety tow percent of over 1,800 gate controlled dams in Korea are classified as small dams. The primary purpose of these small dams is to supply irrigation water. Therefore, while large dams can store as much as 80 percent of precipitation and thus are efficient to control flood, small dams are often lack of flood control function resulting in increased susceptibility drought and flood events. The purpose of this study is to develope a storage management model for irrigation dams occupying the largest portion of small dams. The proposed Storage Management Model (STMM) can be applied to the Seongju dam for efficient management. Besides, the operation standard is capable of analyzing additional available water, considering water demand and 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 Storage management model, it is possible to maximize water resources securance and minimize drought and flood damages.