농업부산물을 활용한 사면보호용 식생 블럭 개발

백승출 ( Baek Sung-chul ),김영익 ( Kim Young-ik ),성찬용 ( Sung Chan-yong ) 한국농공학회 2002 한국농공학회 학술대회초록집 Vol.2002 No.-

This study is performed to develop of planting block using rice straw ash for Protection of Inclined plane. For the planting, porous concrete block is demanded ability to passing water and air through void of block. In this paper, material used for porous concrete block is cement, rice straw ash, and coarse aggregate(5-10, 10-20, 5-20mm). Planting block size is 23*23*4cm and kinds of planting are Tall fescue, Lespedeza cyrtobotrya and Lespedeza cuneata. The results measured for three months show that possible planting of various kinds for porous concrete block.

재생 폴리머 콘크리트의 물리ㆍ역학적 특성

백승출 ( Baek Seung-chul ),김영익 ( Kim Young-ik ),성찬용 ( Sung Chan-yong ),최상릉 ( Choi Sang-leung ) 한국농공학회 2003 한국농공학회 학술대회초록집 Vol.2003 No.-

This study is performed to examine the physical and mechanical properties of recycled polymer concrete using recycled coarse aggregate and recycled fine aggregate. Tests for compressive strength, flexural strength and pulse velocity with replacement ratio of reycled coarse aggregate and recycled fine aggregate are perfonned. As a result, compressive strength, flexural strength and pulse velocity of polymer concrete containing recycled coarse aggregate are in the range of 826-849 kgf/cm², 192~200 kgf/cm² and 3,932~4,000 m/s, respectively. Compressive strength, flexural strength and pulse velocity of polymer d 2 2 concrete containing crushe stone only are 805 kgf/cm², 197 kgf/cm² and 3,931 m/s, respectively. Accordingly, recycled aggregates is expected that can be utilizing as an aggregate of polymer concrete.

재생골재를 사용한 폴리머 콘크리트의 강도 특성

성찬용,백승출,Sung, Chan-Yong,Back, Seung-Chul 한국농공학회 2005 한국농공학회논문집 Vol.47 No.4

This study was performed to evaluate the strength properties of polymer concrete using recycled aggre-gate. The compressive strength, splitting tensile strength, flexural strength and pulse velocity of polymer concrete were decreased with increasing the content of recycled aggregate. At the curing age of 7days, the compressive strength was $80.5\~88.3$ MPa, the splitting tensile strength was $9.1\~10.6$ MPa, the flexural strength was $19.2\~21.5$ MPa and the pulse velocity was $3,931\~4,041$ m/s, respectively. Also, the compressive strength, splitting tensile strength, flexural strength and pulse velocity of concrete using recycled fine aggregate were higher than that of the silica sand. Therefore, these recycled aggregate polymer concretes were estimated for high strength concrete without major problem.

재생골재를 사용한 폴리머 콘크리트의 물리·역학적 특성

성찬용,백승출 충남대학교 농업과학연구소 2005 농업과학연구 Vol.32 No.1

This study was performed to evaluate the physical and mechanical properties of polymer concrete using unsaturated polyester resin, initiator, heavy calcium carbonate, crushed gravel, recycled coarse aggregate, silica sand and recycled fine aggregate. The unit weight, compressive strength, flexural strength and dynamic modulus of elasticity were decreased with increasing the content of recycled aggregate. The unit weight, compressive strength, flexural strength and dynamic modulus of elasticity were showed in 2,127~2,239kg/m^(3), 80.5~88.3MPa, 19.2~21.5MPa and 254x10^(2)~288x10^(2)MPa at the curing age 7 days, respectively. Therefore, these recycled aggregate can be used for polymer concrete.

MODIS LAI 자료를 활용하여 임상별로 고려한 SWAT의 수문 평가: 용담댐유역을 대상으로

한대영,이지완,김원진,백승출,김성준 한국수자원학회 2021 한국수자원학회논문집 Vol.54 No.11

This study compares and analyzes the Soil and Water Assessment Tool (SWAT) and Terra MODIS (Moderate Resolution Imaging Spectroradiometer) as coniferous, deciduous and mixed forest with Yongdam Dam upstream (904.4 km2). The hydrologic evaluation period was set to 10 years from 2010 to 2019, and the applicability of the 8-day MOD15A2 Leaf Area Index (LAI) data, 3 TDR (Time Domain Reflectometry) (GB, JC, CC), and 1 Flux Tower (DU) evaporation volume (YDD) data was simulated. As a result, the R2 of coniferous forest, deciduous forest and mixed forest are 0.95, 0.89, 0.90, soil moisture and evaportranspiration stations R2 were analyzed at 0.50 to 0.55 and 0.51, respectively, with R2 at 0.74, RMSE 2.75 mm/day, NSE 0.70 and PBIAS 14.3% for Yongdam inflow. Based on the calibrated and validated watersheds, the annual average evaportranspiration was calculated as coniferous 469.7 mm, deciduous 501. mm and 511.5 mm mixed forest, total runoff were estimated at coniferous 909.8 mm, deciduous 860.6 mm and 864.2 mm mixed forest. In the case of annual average evaportranspiration, it was evaluated that deciduous were high, but in the case of streamflow, it was evaluated that coniferous were high. Unlike other hydrologic with similar patterns throughout the year, the average annual evapotranspiration was about 7% higher than coniferous due to the higher evapotranspiration of deciduous with high leaf area index in summer and fall. In addition, deciduous were 9% and 6% higher for surface runoff and lateral flow, but the groundwater of coniferous was 77% higher. Therefore, it was confirmed that the total runoff was in order of coniferous, mixed forest, and deciduous. 본 연구는 용담댐 유역(904.4 km2)을 대상으로 준분포형 장기유출 모델인 SWAT (Soil and Water Assessment Tool)과 Terra MODIS (Moderate Resolution Imaging Spectroradiometer)의 엽면적지수 위성자료를 활용하여 임상별로 수문에 미치는 영향을 비교 및 분석하였다. 수문 평가 기간은 2010년부터 2019년까지 10년으로 설정하였으며, 8일 간격의 MOD15A2 LAI (Leaf Area Index)자료, 토양수분 TDR (Time Domain Reflectometry) 관측소 3개소(GB, JC, CC), 증발산량 Flux Tower 1개소(DU)와 용담댐(YDD) 유입량 자료를 SWAT 모의결과와 비교하여 적용성을 검토하였다. 검·보정 결과, 침엽수, 활엽수, 혼효림 LAI의 R2는 각각 0.95, 0.89, 0.90이며, 토양수분 및 증발산량 관측소 R2는 각각 0.50 ~ 0.55, 0.51로 분석되었으며, 용담댐 유입량의 경우 R2의 경우 0.74, RMSE 2.75 mm/day, NSE 0.70, PBIAS 14.3 %로 분석되었다. 검·보정된 유역을 기반으로 하여 HRU에서 침엽수, 활엽수, 혼효림 수문분석 결과 총 연평균 증발산량은 침엽수 469.7 mm 이며, 활엽수는 501.0 mm, 혼효림의 경우 511.5 mm로 산정되었으며, 유출량은 침엽수 909.8 mm, 활엽수 860.6 mm, 혼효림 864.2 mm로 산정되었다. 연중 패턴이 비슷한 다른 수문과 다르게 여름과 가을에 엽면적지수가 높은 활엽수의 증발산량이 침엽수에 비해 높아 연평균 증발산량이 약 7% 높게 산정되었다. 또한, 유출량의 경우 지표유출 및 중간유출의 경우 활엽수가 각각 9%, 6% 높았으나, 침엽수의 기저유출이 77% 더 높은 것으로 산정됐다. 따라서, 총유출량이 침엽수 혼효림 활엽수 순으로 많은 것을 확인할 수 있었다.

순환형 농업용수관리를 위한 농업용 저수지의 비관개기 양수저류 추정

방나경,남원호,신지현,김한중,강구,백승출,이광야 한국농공학회 2020 한국농공학회논문집 Vol.62 No.4

The extreme 2017 spring drought affected a large portion of South Korea in the Southern Gyeonggi-do and Chungcheongnam-do districts. This droughtevent was one of the climatologically driest spring seasons over the 1961-2016 period of record. It was characterized by exceptionally low reservoirwater levels, with the average water level being 36% lower over most of western South Korea. In this study, we consider drought response methodsto alleviate the shortage of agricultural water in times of drought. It could be to store water from a stream into a reservoir. There is a cyclical methodfor reusing water supplied from a reservoir into streams through drainage. We intended to present a decision-making plan for water supply based onthe calculation of the quantity of water supply and leakage. We compared the rainfall-runoff equation with the TANK model, which is a long-termrun-off model. Estimations of reservoir inflow during non-irrigation seasons applied to the Madun, Daesa, and Pungjeon reservoirs. We applied therun-off flow to the last 30 years of rainfall data to estimate reservoir storage. We calculated the available water in the river during the non-irrigationseason. The daily average inflow from 2003 to 2018 was calculated from October to April. Simulation results show that an average of 67,000 tonsof water is obtained during the non-irrigation season. The report shows that about 53,000 tons of water are available except during the winter seasonfrom December to February. The Madun Reservoir began in early October with a 10 percent storage rate. In the starting ratio, a simulated rate of 4K, 6 K, and 8 K tons is predicted to be 44%, 50%, and 60%. We can estimate the amount of water needed and the timing of water pump operationsduring the non-irrigation season that focuses on fresh water reservoirs and improve decision making for efficient water supplies.