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한국농공학회논문집 update

Journal of the Korean Society of Agricultural Engineers

  • : 한국농공학회
  • : 농학분야  >  농공학
  • : KCI등재
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  • : 연속간행물
  • : 격월
  • : 1738-3692
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  • : 한국농공학회지(~2003) → 한국농공학회논문집(2004~)

수록정보
수록범위 : 46권1호(2004)~60권1호(2018) |수록논문 수 : 937
한국농공학회논문집
60권1호(2018년 01월) 수록논문
최근 권호 논문
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KCI등재

1필터간격을 고려한 농업용저수지 제체의 침투특성

저자 : 이영학 ( Lee Young Hak ) , 이달원 ( Lee Dal Won )

발행기관 : 한국농공학회 간행물 : 한국농공학회논문집 60권 1호 발행 연도 : 2018 페이지 : pp. 1-10 (10 pages)

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This study analyzed pore water pressure, seepage and leakage quantity, height of seepage and critical hydraulic gradient in order to suggest the seepage characteristics of agricultural reservoir embankment considering filter interval. The seepage characteristics of a deteriorated reservoir embankments were conducted according to the horizontal filter intervals range using three- dimensional finite element analysis. The wider the horizontal filter interval, the higher the pore water pressure increased, and the pore water pressure ratio in the center of the core has a greater effect than the base part. The seepage and leakage quantity appeared largely in the two-dimensional analysis conditions (case 1), where the filter was constructed totally in the longitudinal direction of the embankment, the wider the horizontal filter interval was gradually reduced. The reasonable filter intervals to yield efficient seepage characteristics were within 30 m for the pore water pressure of the core and the height of the seepage line. The stability of the filter installation was able to evaluate the stability of the piping by the critical hydraulic gradient method. The deteriorated reservoir with no filters or decreased functionality can significantly reduce the possibility of piping by simply installing a filter on the downstream slope. In the future, the deteriorated reservoir embankment should be checked for the reservoir remodeling because the core and filter functions have been lost or decreased significantly. In the case of a new installation, the seepage characteristic behavior due to the core and filter changes should be applied to the field after obtaining a reasonable horizontal filter interval that satisfies the safety factor by a three-dimensional analysis.

KCI등재

22014~2015 연속가뭄을 고려한 SWAT 수질 매개변수 보정

저자 : 김다래 ( Kim Da Rae ) , 이지완 ( Lee Ji Wan ) , 정충길 ( Jung Chung Gil ) , 김성준 ( Kim Seo

발행기관 : 한국농공학회 간행물 : 한국농공학회논문집 60권 1호 발행 연도 : 2018 페이지 : pp. 11-20 (10 pages)

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This study is to calibrate the SWAT (Soil and Water Assessment Tool) water quality of SS (Suspended Solid), T-P (Total Phosphorus), and T-N (Total Nitrogen) by focusing on 2014~2015 drought periods and identify the important parameters. For Gongdo watershed (366.5 km 2 ), the SWAT was calibrated for 2 cases of 2002~2006 normal year focusing calibration and 2014~2015 drought focusing calibration respectively. The parameters of N_UPDIS (Nitrogen uptake distribution parameter) and CMN (Rate factor for humus mineralization of active organic nutrients) played important roles for T-N calibration during drought periods. The SWAT SS, T-N, and T-P average R 2 (Coefficient of determination) results by focusing on 2014~2015 drought periods calibration showed 0.71, 0.65 and 0.62 while 2002~2006 normal year focusing calibration showed 0.63, 0.58 and 0.50 respectively. Also SWAT SS, T-N, and T-P model efficiency NSE (Nash-Sutcliffe efficiency) results by focusing on drought period (2014~2015) calibrated showed 0.76, 0.77, 0.87 respectively. Even though the SS, T-P parameters were unchanged during the calibration, the SS and T-P results were improved by the hydrological parameters (SCS-CN, SOL_K, SLSOIL) during the drought periods. The SWAT water quality calibration needs to be considered for the movement of SS and nutrients transport especially focusing on the drought characteristics.

KCI등재

3원격탐사자료 기반 유효토양특성 산정을 위한 토양수분자료동화기법 개발

저자 : 이태화 ( Lee Taehwa ) , 김상우 ( Kim Sangwoo ) , 이상호 ( Lee Sang-ho ) , 최경숙 ( Choi Kyun

발행기관 : 한국농공학회 간행물 : 한국농공학회논문집 60권 1호 발행 연도 : 2018 페이지 : pp. 21-30 (10 pages)

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In this study, we developed the Soil Moisture Data Assimilation (SMDA) scheme to extract Effective Soil Characteristics-ESC (Sand, Silt, Clay %) from MODerate resolution Imaging Spectroradiometer (MODIS) products. The SMDA scheme was applied to the MODIS-based Soil Moisture (SM) data during the summer (July to September) period. Then the ESC and soil erosion factors (K) were predicted, respectively. Several numerical experiments were conducted to test the performance of SMDA at the study sites under the synthetic and field validation conditions. In the synthetic experiment, the estimated soil moistures values(R: >0.990 and RMSE: <0.005) were identified well with the synthetic observations. The field validation results at the Bangdongri and Chungmicheon sites were also comparable to the TDR-based measurements with the statistics (R: 0.772/0.000 and RMSE: 0.065/0.000). The estimated ESC values were also matched well with the measurements for the synthetic and field validation conditions. Then we tested the SMDA scheme to extract the ESC from the MODIS-based soil moisture products. Although uncertainties exist in the results, the estimated soil moisture and ESC based on the SMDA were comparable to the measurements. Overall, the K factors were similarly distributed based on the derived ESC. Also, the K factors in the mountainous regions were higher than those of the relatively flat areas. Thus, the newly developed SMDA scheme can be useful to estimate spatially and temporally-distributed soil erosion and establish soil erosion management plans.

KCI등재

4소규모 밭 관개용수 확보를 위한 소류천 빗물 집수장치의 현장 평가

저자 : 최용훈 ( Choi Yonghun ) , 김영진 ( Kim Youngjin ) , 김민영 ( Kim Minyoung ) , 전종길 ( Jeon

발행기관 : 한국농공학회 간행물 : 한국농공학회논문집 60권 1호 발행 연도 : 2018 페이지 : pp. 31-36 (6 pages)

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A rainwater harvesting device was developed for runoff flow harvesting in a small stream or channel and its performance was evaluated in small fields. The rainwater harvesting device has slits on its side of cylindrical volume in 15 cm diameter and 70 cm length, which is designed to increase its water flow harvesting capacity. The maximum collectable water quantity was about 0.0022 ton/sec (130 L/min). Rainwater harvesting device were installed in two locations (P1, P2). P1 is a point for rainfall runoff flow harvesting. P2 is a point for ordinary flow harvesting. During this study, total rainfall depth was 334.5 mm. Runoff of 1,722 ton and 7,984 ton occurred in P1 and P2, and 273 ton and 125 ton were collected by this rainwater harvesting device. Harvesting efficiency was calculated as 15.85 % and 1.57 % in P1 and P2. Clogging of screen filter media in the cylinder due to soil and suspended solids has lowered the harvesting efficiency. However, it was possible to harvest 30 ton/month of rainwater harvesting and it is expected that it will help to solve short-term water shortage.

KCI등재

5농촌주민의 역량이 농촌개발의 참여확대에 미치는 영향분석

저자 : 고진영 ( Koh Jin Young ) , 김지용 ( Kim Jee Yong ) , 양민호 ( Yang Min Ho ) , 김명일 ( Kim M

발행기관 : 한국농공학회 간행물 : 한국농공학회논문집 60권 1호 발행 연도 : 2018 페이지 : pp. 37-45 (9 pages)

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This study is aims to voluntary participation in rural development projects, voluntary participation by analyzing the individual competence factors, how the what and how much influence affect the continued involvement and participation as a concept of strengthening community capacity the plan for it to present. The results of survey, through factor analysis and reliability analysis for extracting the components of individual competence areas and life satisfaction, self acting capacity, was extracted with recognized competence, was the factor analysis and reliability analysis for ongoing involvement and participation. Personal competence was a multiple regression analysis, the participation of three elements as independent variables as dependent variables to evaluate the impact of continuing involvement, and the resulting Regional and life satisfaction (β = 0.301) have the greatest impact It showed. In addition, regional analysis and life satisfaction (β = 0.247) on the impact of enlargement on the individual capabilities showed the highest participation. The elements of local life satisfaction and personal competencies exerts the greatest influence on the continued involvement and participation in the study was obtained. It based on the results in rural development for the voluntary participation and participation of the population should be considered with a plan to enhance the regional and life satisfaction, “the software business, which is carried out in rural areas developed for them by local residents the measures to increase life satisfaction will be provided.

KCI등재

6SWAT 모형을 이용한 대유역 강우-유출해석: 메콩강 유역을 중심으로

저자 : 이대업 ( Lee Dae Eop ) , 유완식 ( Yu Wan Sik ) , 이기하 ( Lee Gi Ha )

발행기관 : 한국농공학회 간행물 : 한국농공학회논문집 60권 1호 발행 연도 : 2018 페이지 : pp. 47-57 (11 pages)

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This study implemented the rainfall-runoff analysis of the Mekong River basin using the SWAT (Soil and Water Assessment Tool). The runoff analysis was simulated for 2000~2007, and 11 parameters were calibrated using the SUFI-2 (Sequential Uncertainty Fitting-version 2) algorithm of SWAT-CUP (Calibration and Uncertainty Program). As a result of analyzing optimal parameters and sensitivity analysis for 6 cases, the parameter ALPHA_BF was found to be the most sensitive. The reproducibility of the rainfall-runoff results decreased with increasing number of stations used for parameter calibration. The rainfall-runoff simulation results of Case 6 showed that the RMSE of Nong Khai and Kratie stations were 0.97 and 0.9, respectively, and the runoff patterns were relatively accurately simulated. The runoff patterns of Mukdahan and Khong Chaim stations were underestimated during the flood season from 2004 to 2005 but it was acceptable in terms of the overall runoff pattern. These results suggest that the combination of SWAT and SWAT-CUP models is applicable to very large watersheds such as the Mekong for rainfall-runoff simulation, but further studies are needed to reduce the range of modeling uncertainty.

KCI등재

73차원 수치해석을 통한 복합하중이 작용하는 농업용저수지의 거동 분석

저자 : 송창섭 ( Song Chang Seob ) , 우제근 ( Woo Jea Keun ) , 안광국 ( Ahn Kwangkuk ) , 김명환 ( Ki

발행기관 : 한국농공학회 간행물 : 한국농공학회논문집 60권 1호 발행 연도 : 2018 페이지 : pp. 59-65 (7 pages)

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The object of this paper was to analyze combined load acting on agricultural reservoir. This study was carried out to 3-D numerical modeling for displacement characteristic and seismic acceleration characteristic. The results of study were analyzed and summarized as follow. It was found that the displacement caused by combined load acting on railway and agricultural reservoir did not reflect the effect of load and the seismic wave consistently. The ground accelerations that occur in railway and dam were amplified because 3-D numerical analysis program interprets ground as an elastic body. Actual ground shows characteristics of elasticity and plasticity, so measured values will show different tendency. As a result of analyzing displacement characteristics, it is considered to be related to stiffness. The Ofunato seismic wave, the displacement (77.1 mm) of the body satisfied the allowable displacement (220 mm), but The Hachinohe seismic wave (282.8 mm) did not. It is considered that displacement caused by combined load is affected not only by acceleration but also by characteristics of materials.

KCI등재

8UAV 항공사진을 이용한 산림지 횡단면도 추출 및 사면안정성 평가

저자 : 김태진 ( Kim Taejin ) , 손영환 ( Son Younghwan ) , 박재성 ( Park Jaesung ) , 김동근 ( Kim Do

발행기관 : 한국농공학회 간행물 : 한국농공학회논문집 60권 1호 발행 연도 : 2018 페이지 : pp. 67-77 (11 pages)

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The objective of this study is to extract the shape of the slope from the images acquired using UAV and evaluate its suitability and reliability when applied to slope stability analysis. UAV is relatively inexpensive and simple, and it is possible to make terrain survey by generating point clouds. However, the image acquired from UAV can not be directly photographed by the forest canopy due to the influence of trees, resulting in severe distortion of the terrain. In this study, therefore, the effects of forest canopy were verified and the slope stability analysis was performed. Images acquired in winter and summer were used, because summer images are heavily influenced by the forest canopy and winter images are not. As a result of the study, the winter image is suitable for the extraction of slope shape, but severe terrain distortion occurs in the summer image. Therefore, slope stability analysis using slope shape extracted from summer image is impossible, so it should be modified for slope stability analysis. The modified slope did not completely eliminate the distortion of the terrain, but it could express the approximate shape of the slope. As a result of the slope stability analysis, the location and shape of the failure surface are the same, and the error of the safety factor is less than 0.2, which is close to the actual slope.

KCI등재

9논에서 SRI 물관리 방법에 의한 온실가스와 관개용수 저감효과 분석

저자 : 서지연 ( Seo Jiyeon ) , 박배경 ( Park Baekyung ) , 박운지 ( Park Woonji ) , 이수인 ( Lee Sui

발행기관 : 한국농공학회 간행물 : 한국농공학회논문집 60권 1호 발행 연도 : 2018 페이지 : pp. 79-87 (9 pages)

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Water management impacts both methane (CH4) and nitrous oxide (N2O) emissions from rice paddy fields. Although irrigation is one of the most important methods for reducing CH4 emission in rice production systems it can also N2O emissions and reduce crop yields. A feasibility study on the system of rice intensification (SRI) methods with respect to irrigation requirements, greenhouse gas (GHG) emissions was conducted for either 2 or 3 years depending on the treatment in Korea. The SRI methods (i.e. SRI and midsummer drainage (MD) with conventional practice (CT)) reduced the irrigation requirement by 49.0 and 22.0 %, respectively. Global warming contribution of GHG to different depending on the type of GHG. Therefore, the emission of CH4 and N2O shall be converted to Global Warming Potential (GWP). The GHG emission from the conventional practice with midsummer drainage (MD) and the SRI plots, in GWP were reduced by 49.1 and 77.1 %, respectively. Application of SRI water management method could help to improve Korea's water resources and could thus contribute to mitigation of the negative effects of global warming.

KCI등재

10AR5 기후변화 시나리오에 따른 소양강댐 유역 댐유입량 및 증발산량의 변화 분석

저자 : 도연수 ( Do Yeonsu ) , 김광섭 ( Kim Gwangseob )

발행기관 : 한국농공학회 간행물 : 한국농공학회논문집 60권 1호 발행 연도 : 2018 페이지 : pp. 89-99 (11 pages)

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This study analyzed the change of the dam inflow and evapotranspiration in the Soyanggang dam basin using the results of 26 CMIP5 GCMs based on AR5 RCP 4.5 and RCP 8.5 scenarios. The SWAT model was used to simulate the dam inflow and evapotranspiration in the target watershed. The simulation was performed during 2010~2016 as the reference year and during 2010~2099 as the analysis period. Bias correction of input data such as precipitation and air temperature were conducted for the reference period of 2006~2016. Results were analyzed for 3 different periods, 2025s (2010~2040), 2055s (2041~2070), and 2085s (2071~2099). It demonstrated that the change of dam inflow gradually increases 9.5~15.9 % for RCP 4.5 and 13.3~29.8 % for RCP 8.5. The change of evapotranspiration gradually increases 1.6~8.6 % for RCP 4.5 and 1.5~8.5 % for RCP8.5.

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1연안해역에서 석유오염물질의 세균학적 분해에 관한 연구

(2006)홍길동 외 1명심리학41회 피인용

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(2006)홍길동41회 피인용

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