국제회의 참가기 - II: 인도네시아 족자카르타 국제관개배수집행위원회의 참가기

윤석군,Yun, Seok-Gun 한국관개배수위원회 2010 한국관개배수회지 Vol.46 No.-

수문모니터링과 물수지법을 이용한 농업용 저수지 유역 유출곡선번호 추정

윤광식,김영주,윤석군,정재운,한국헌,Yoon, Kwang-Sik,Kim, Young-Joo,Yoon, Suk-Gun,Jung, Jae-Woon,Han, Kuk-Heon 한국농공학회 2005 한국농공학회논문집 Vol.47 No.3

The rainfall-runoff potential of Jangseong reservoir watershed was studied based on SCS (Soil Conservation Service, which is now the NRCS, Natural Resources Conservation Service, USDA) runoff curve number (CN) technique. Precipitation and reservoir operation data had been collected. The rainfall-runoff pairs from the watershed for ten years was estimated using reservoir water balance analysis using reservoir operation records. The maximum retention, S, for each storm event from rainfall-runoff pair was estimated for selected storm events. The estimated S values were arranged in descending order, then its probability distribution was determined as log-normal distribution, and associated CNs were found about probability levels of Pr=0.1, 0.5, and 0.9, respectively. A subwatershed that has the similar portions of land use categories to the whole watershed of Jangseong reservoir was selected and hydrologic monitoring was conducted. CNs for subwatershed were determined using observed data. CNs determined from observed rainfall-runoff data and reservoir water balance analysis were compared to the suggested CNs by the method of SCS-NEH4. The $CN_{II}$ measured and estimated from water balance analysis in this study were 78.0 and 78.1, respectively. However, the $CN_{II}$, which was determined based on hydrologic soil group, land use, was 67.2 indicating that actual runoff potential of Jangseong reservoir watershed is higher than that evaluated by SCS-NEH4 method. The results showed that watershed runoff potential for large scale agricultural reservoirs needs to be examined for efficient management of water resources and flood prevention.

영산강 IV단계 사업지구 밭관개 실태조사

윤광식,김영주,윤석군,한국헌,김진택,Yoon Kwang Sik,Kim Young Joo,Yoon Suk Gun,Han Kuk Heon,Kim Jin Taek 한국관개배수위원회 2004 한국관개배수논문집 Vol.11 No.2

To devise better development plan, survey was conducted about current farmer's irrigation management on upland in the YoungSan River Irrigation Project District IV. Major upland crops are garlic and onion in this region. Currently, upland irrigation has b

Pollutant Load Characteristics of a Rural Watershed of Juam Lake

한국헌,윤광식,정재운,윤석군,김영주,Han, Kuk-Heon,Yoon, Kwang-Sik,Jung, Jae-Woon,Yoon, Suk-Gun,Kim, Young-Joo The Korean Society of Agricultural Engineers 2005 한국농공학회논문집 Vol.47 No.3

A monitoring study has been conducted to identify hydrologic conditions, water quality and nutrient loading characteristics of small watershed in Juam Lake. Climate data of the watershed were collected; flow rate was measured and water quality sampling was conducted at the watershed outlet for this study. Water quality data revealed that T-P concentrations meet I grade of lake water quality standard during non-storm period, but degraded up to II-III grade of lake water quality standard during storm period. The observed T-N concentrations always exceeded lake water quality standard. Therefore, T-P was identified as limiting chemical constituent for eutrophication of Juam Lake. T-P concentration of non-storm period also revealed that point source pollution is not serious in the watershed. Three year monitoring results showed that the observed T-N losses were $10.85\~18.88$ kg/ha and T-P losses were $0.028\~0.323$ kg/ha during six month (Mar. - Oct.), respectively. Major portion of runoff amount discharged by a few storm events a year and nutrient load showed apparent seasonal variation. Huge runoff amounts were generated by intense storms, which make application of water treatment or detention facilities ineffective. Monitoring results confirmed that water quality improvement by abating nonpoint source pollution in rural watershed of monsoon climate should be focused on source control. T-P losses from paddy field seemed to consist of significant amount of total load from study watershed. Therefore, management of drainage from paddy field is considered to be important for preventing algal blooming problem in Juam Lake.

간척지 논 침수 원인 조사와 방재 대책 수립

정주홍,윤광식,최수명,윤석군,고영배,김영택,Jeong, Ju-Hong,Yoon, Kwang-Sik,Choi, Soo-Myung,Yoon,, Suk-Gun,Go, Young-Bae,Kim, Young-Taek 한국관개배수위원회 2010 한국관개배수논문집 Vol.17 No.2

Tidal land reclamation provided water resources and land for agriculture and contributed stable crop production. However, climate change by global warming disrupts the hydrologic circulatory system of the earth resulting in sea level rise and more frequent flood for reclaimed arable land. Recently, Suyu reclaimed paddy field in Jindo-gun experienced prolonged inundation after heavy rainfall and there is a growing risk of flood damage. Onsite survey and flood analysis using GATE_Pro model of Korea Rural Corporation were conducted to investigate causes of flooding. To perform the analysis, input data such as inflow hydrograph, the lowest elevation of paddy field, neap tide level, management level of Gunnae estuary lake at the time of the flood were collected. Flood analysis confirmed that current drainage facilities are not enough to prevent 20year return period flood. The result of analysis showed flooding more than 24hours. Therefore, flood mitigation alternatives such as sluice gate expansion, installation drainage pumping station, refill paddy land, and catch canal were studied. Replacing drainage culvert of Suyu dike to sluice gate and installing drainage pumping station at the Gunne lake were identified as an effective flood control measures. Furthermore, TM/TC (SCADA) system and expert for gate management are required for the better management of drainage for estuary dam and flood mitigation.

경제성 지표를 활용한 농업용저수지의 생활용수 공급가능성 평가

윤광식,최수명,채종훈,유승환,최동호,윤석군,이창희,정경훈,신길채 한국농촌계획학회 2017 농촌계획 Vol.23 No.1

Existing agricultural reservoirs are considered as alternative source for the water welfare of rural area. In this study, domestic water supply potential of 476 reservoirs, which has storage capacity more than one million cubic meter, out of 3,377 agricultural reservoirs managed by Korean Rural Community Corporation (KRC) were investigated. Among them water quality of 136 reservoirs met the criteria of domestic water source which show less than COD 3 ppm. Available amount for domestic water of reservoirs, which meet the water quality, for ten year return period of drought was analyzed with reservoir water balance model. The results showed that 116 reservoirs has potential for supplementary domestic water supply while satisfying irrigation water supply. Finally, economic analysis using Net Present Value (NPV), Benefit–Cost (B/C) ratio, Internal Rate of Return (IRR), and Profitability Index (PI) methods was also conducted. The analysis showed that 19 reservoirs satisfied economic feasibility when water is provided from reservoir outlet but only 9 reservoirs meet the economic feasibility if water delivered from a reservoir to treatment plant by newly built conveyance canal. In order to supply the domestic water through the agricultural reservoirs managed by KRC, it is necessary to flexibly interpret and operate the ‘Rearrangement of Agricultural and Fishing village Act’. Also, it is reasonable to participate in the water service business when there is a supply request from other Ministries. In addition, the KRC requires further effort to change the crop system for saving water and improve efficiency of irrigation systems.

슬러리점토의 압밀특성

정규향(Cheong, Gyu Hyang),정종진(Cheong, Jong Jin),김교준(Kim, Gyo Jun),윤석군(Yoon, Suk Gun) 한국해안해양공학회 2005 한국해안해양공학회 논문집 Vol.17 No.1

매립재로 이용되는 준설점토는 일반적으로 함수비가 매우 크며, 작은 압밀하중이 작용하더라도 큰 침하가 일어나는 특성을 지닌다. 이러한 초연약지반을 개량하는 공법설계를 위해서는 압밀특성을 구하는 실험이 실시되어야 한다. 그러나 일반적인 표준압밀시험방법으로는 슬러리상태의 흙이 압밀링의 벽면을 타고 상하부로 흘러나오기 때문에 실험이 불가능하다. 따라서, 본 연구에서는 Rowe cell 시험기를 사용하여 준설점토에 대한 압밀시험을 실시하였으며, 함수비의 변화가 압밀특성에 주는 영향을 검토하기 위해서 함수비를 100%, 110%, 120%, 133%, 150% 등 5종류로 변화시켜서 실험을 실시하였다. 실험결과로부터 준설매립지반의 개량을 위한 설계를 하는 경우, 실제 압밀시험을 하지 않고도, 현장 함수비가 측정되면 개략적인 압축지수와 압밀계수 및 변형률을 예측할 수 있는 식을 제안하였다. Dredged soil from sea has much higher water content than liquid limit of clay and even if small loads apply, it will suffer a great settlement. Therefore it is very difficult to perform a consolidation test with general consolidation apparatus because of high water content. In this study Rowe cell apparatus consolidation tests have been performed with 5 slurry clays of a water content of 100%, 110%, 120%, 133%, and 150%. From the test results the consolidation characteristics such as compression index, secondary compression index, consolidation coefficient, and strain have been investigated with a variation of water content of dredged soil. The equations to get consolidation constants such as a compression index, a coefficient of consolidation, and strain have been proposed with the field water content.

간척지 침수피해 조사 및 보완대책 수립연구

정주홍 ( Juhong Jung ),윤광식 ( Kwangsik Yoon ),최수명 ( Soomyoung Choi ),최우정 ( Woojung Choi ),윤석군 ( Sukgu Yoon ),김영택 ( Youngtaek Kim ) 한국농공학회 2010 한국농공학회 학술대회초록집 Vol.2010 No.-

간척지 개발은 국토확장 및 토지이용의 창출과 국민 생활공간 확대, 농업은 물론 기타 산업의 발전, 농경지의 확장에 의한 식량 증산을 구현해왔다. 그러나, 지구온난화에 따른 기후변화는 지구의 순환 시스템을 교란시켜 홍수, 해수면 상승, 가뭄 등 이상기후를 발생시키고 있다. 특히 자연재해의 90%가 수해와 관련하여 나타나는 우리나라는 홍수량이 증대하여 농경지에 대한 침수피해의 위험이 증가하고 있는 실정이다. 본 연구에서는 2009년 전라남도 진도군 진도읍 전두리와 군내면 나리 일대 간척지의 집중호우로 인한 침/관수 피해의 원인을 분석하고, 향후 재발 방지 방안의 기술적 검토를 실시하였다. 침수분석은 한국농어촌공사의 GATE_Pro(배수갑문 능력검토 프로그램) 모형을 이용하였다. 침수분석을 시행함에 있어 자연배제가 상대적으로 불리한 소조시의 외수위를 적용하였고, 최저답면고는 침하를 고려하여 EL(-)0.40m를 적용하였다. 또한 관리수위는 침수당시의 EL(-)0.85m를 적용하였으며, 시간별 홍수량 20년 빈도에 대하여 분석을 실시하였다. 재발방지에 대한 방안으로는 군내지구 또는 수유지구의 배수갑문 규모 확장, 배수기장 신설, 매립에 의한 최저답고 조정, 승수로 신설 등에 대하여 검토하였다. 침수분석결과 현재 담수호 관리수위 조건에서는 수유지구에 24시간 이상의 침수가 발생하는 것으로 분석되어 침수방지를 위한 배수시스템의 개선 및 배수로 정비가 시급하고, 담수호 수위 및 배수갑문 관리의 전문성이 필요하였다. 침수 방안으로는 Box 암거의 문제점 개선을 위해 인양비로 교체하고 침수문제의 근본적 해결을 위해 배수기장의 설치가 필요하였다. 또한 체계적인 배수갑문 관리를 위한 TM/TC(SCADA) system을 도입하여 배수갑문 가동을 편리하고 효율적으로 관리해야 할 것으로 판단되었다.

비우량 방법에 의한 논 오염부하 원단위 산정시 적용성 평가

정재운 ( Jae Woon Jung ),윤광식 ( Kwang Sik Yoon ),윤석군 ( Suk Gun Yoon ),최우정 ( Woo Jung Choi ),최우영 ( Woo Young Choi ),허유정 ( Yu Jeong Huh ),조경민 ( Kyeong Min Cho ),홍정진 ( Jung Jin Hong ) 한국물환경학회 2009 한국물환경학회지 Vol.25 No.6

준설토의 표층처리에 관한 연구

정규향 ( Cheong Gyu Hyang ),이문수 ( Lee Moon Su ),이광찬 ( Lee Kwang Chan ),윤석군 ( Youn Sug Gun ),오재화 ( Oh Jae Hwa ) 한국농공학회 1999 한국농공학회 학술대회초록집 Vol.1999 No.-

In Soft ground of south-western coast of our country necessity of marine industrial complex and container facility has been remarkable. Site construction for habor facility is one of the most urgent problems. Consolidation of dredged fill has become important task. In addition, volume change of dredged fill should be examined carefully. This study dealt with consolidation of dredged fill by PCDDF and in order to secure trafficability of heavy equipment for surface treatment should be studied.