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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of The Korean Society of Agricultural Engineers
Journal Basic Information
Journal DOI :
The Korean Society of Agricultural Engineers
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Volume & Issues
Volume 50, Issue 6 - Nov 2008
Volume 50, Issue 5 - Sep 2008
Volume 50, Issue 4 - Jul 2008
Volume 50, Issue 3 - May 2008
Volume 50, Issue 2 - Mar 2008
Volume 50, Issue 1 - Jan 2008
Selecting the target year
Characteristic Analysis of the Coefficient of Initial Abstraction and Development of its Formular in the Rural Watersheds - for the Small-Medium Watersheds in the Geum and Sapkyo River -
Kim, Tai-Cheol ; Lee, Jeong-Seon ;
Journal of The Korean Society of Agricultural Engineers, volume 50, issue 6, 2008, Pages 3~12
DOI : 10.5389/KSAE.2008.50.6.003
It is important to estimate accurate effective rainfall to analyse flood flow and long-term runoff for the rational planning, design, and management of water resource. The initial abstraction is also important to estimate effective rainfall. The Soil Conservation Service (SCS) has developed a procedure and it has been most commonly applied to estimate effective rainfall. But the SCS method still has weak points, because of unnatural assumptions such as antecedent moisture conditions and initial abstraction. The coefficient of initial abstraction(K) is depending on the soil moisture condition and antecedent rainfall. The maximum storage capacity of Umax which is calibrated by stream flow data in the proposed watershed was derived from the DAWAST(DAily WAtershed STreamflow) model. The values of K obtained from 69 storm events at the five watersheds are ranging from 0.133 to 0.365 and its mean value is 0.207. Effective rainfall could be estimated more reasonably by introducing new concept of initial abstraction. The equation of
was recommended instead of 0.2 and it could be applicable to the small-medium rural watersheds.
Electrical Characteristics against Frequency and Concentration of Contaminated Soils by Mercury and Arsenic
Son, Young-Hwan ; Bong, Tae-Ho ; Chang, Pyoung-Wuck ;
Journal of The Korean Society of Agricultural Engineers, volume 50, issue 6, 2008, Pages 15~24
DOI : 10.5389/KSAE.2008.50.6.015
In general, ground pollution can be classified with soil pollution and underground water pollution. And ground pollution contaminates the land with garbage dumps and other harmful waste products as heavy metals that can also eventually enter our water supply. This study was conducted to define a characteristics of the electrical resistivity and the permittivity of weathered soil that was contaminated with heavy metals as Mercury and Arsenic. It is not easy whether contamination of soil as subsurface contamination is decided or not and at an early stage especially do that. Therefore the electrical resistivity and the permittivity were used to make up for this defects. These methods are more economical and more effective than the existing methods. And variation of the electrical resistivity and the permittivity values were found against the change of concentration of Mercury and Arsenic aqueous solutions and measuring frequency. These analyzed results indicate that the electrical resistivity and the permittivity tend to decrease against increasing measuring frequency. The electrical resistivity and the permittivity are also found to show the function of frequency.
Estimation of the optimal probability distribution for daily electricity generation by wind power in rural green-village planning
Kim, Dae-Sik ; Koo, Seung-Mo ; Nam, Sang-Woon ;
Journal of The Korean Society of Agricultural Engineers, volume 50, issue 6, 2008, Pages 27~35
DOI : 10.5389/KSAE.2008.50.6.027
This study aims to estimate the optimal probability distribution of daily electricity generation by wind power, in order to contribute in rural green-village planning. Wind power generation is now being recognized as one of the most popular sources for renewable resources over the country. Although it is also being adapted to rural area for may reasons, it is important to estimate the magnitudes of power outputs with reliable statistical methodologies while applying historical daily wind data, for correct feasibility analysis. In this study, one of the well-known statistical methodology is employed to define the appropriate statistical distributions for monthly power outputs for specific rural areas. The results imply that the assumption of normal distributions for many cases may lead to incorrect decision-making and therefore lead to the unreliable feasibility analysis. Subjective methodology for testing goodness of fit for normal distributions on all the cases in this study, provides possibilities to consider the other various types of statistical distributions for more precise feasibility analysis.
Estimating Optimal Probability Distributions of Daily Potential Photovoltaic Power Generation for Development of Rural Green-Village by Solar Energy - with Area of Seosan Weather Station -
Kim, Dae-Sik ; Koo, Seung-Mo ; Nam, Sang-Woon ;
Journal of The Korean Society of Agricultural Engineers, volume 50, issue 6, 2008, Pages 37~47
DOI : 10.5389/KSAE.2008.50.6.037
Photovoltaic power generation is currently being recognized as one of the most popular sources for renewable resources over the country. Although it is also being adapted to rural area for may reasons, it is important to estimate the magnitudes of power outputs with reliable statistical methodologies, while applying historical daily solar energy data, for correct feasibility analysis. In this study, one of the well-known statistical methodologies is employed to define the appropriate probability distributions for monthly power outputs for the selected rural area, county of Seo-san, province of Chungnam. The results imply that the assumption of normal distributions for several months may lead to incorrect decision-making and therefore lead to the unreliable feasibility analysis. Generalized beta and triangular distributions were found to be superior to normal distribution, when describing monthly probability distributions for daily photovoltaic power. Based on the appropriate distributions resulted from this study, Monte Carlo simulation technique was also applied to provide additional flexible information for the relevant decision makers. This study found out new finding that the probability distributions should be considered to make planning of the photovoltaic power system in rural village unit, in order to give reasonable economic analysis to the decision makers.
Prediction of Corrosion Threshold Reached at Steel Reinforcement Embedded in Latex Modified Concrete with Mix Proportion Factor
Park, Seung-Ki ; Won, Jong-Pil ; Park, Chan-Gi ; Kim, Jong-Ok ;
Journal of The Korean Society of Agricultural Engineers, volume 50, issue 6, 2008, Pages 49~60
DOI : 10.5389/KSAE.2008.50.6.049
This study were predicted the corrosion threshold reached at steel reinforcement in latex modified concrete(LMC) which were applied the agricultural hydraulic concrete structures. Accelerated testing was accomplished to the evaluate the diffusion coefficient of LMC mix, and the time dependent constants of diffusion. Also, the average chloride diffusion coefficient was estimated. From the average chloride ion diffusion coefficient, the time which critical chloride contents at depth of reinforcement steel was estimated. Test results indicated that the corrosion threshold reached at reinforcement in LMC were effected on the mix proportion factor including cement contents, latex content, and water-cement ratio. Especially, the average chloride diffusion coefficient, the corrosion threshold reached at reinforcement in LMC were affected by the all mix proportion factor.
Life Cycle Cost Method by Segregation of Safety and Function
Lee, Joon-Gu ; Kim, Han-Jung ; Yoon, Seong-Su ; Choi, Won ; Lee, Hyung-Jin ; Kim, Jong-Ok ; Jung, Nam-Su ; Lee, Jeong-Jae ;
Journal of The Korean Society of Agricultural Engineers, volume 50, issue 6, 2008, Pages 61~71
DOI : 10.5389/KSAE.2008.50.6.061
An advanced model for assessing life cycle cost of the facility containing several subdivisions has been proposed with systems engineering approach. This model evaluates the maintenance cost in the sphere of the safety as well as in that of its functionality. The proposed approach has been shown to be more reasonable and practical than existing models. The serviceability and reasonability have been proved through evaluating life cycle cost of the reservoir which is a representative agricultural facility. In addition, the proposed method is helpful to make a maintenance strategy using the survival probability in the point of safety and functionality.
Developing an Optimum Equipment Model for Agricultural Reservoir Considering Beneficiary
Kim, Si-Woon ; Kim, Jong-Ok ; Park, Seong-Ki ; Jung, Nam-Su ; Jang, Woo-Seok ; Lee, Sae-Hee ; Choi, Won ;
Journal of The Korean Society of Agricultural Engineers, volume 50, issue 6, 2008, Pages 75~81
DOI : 10.5389/KSAE.2008.50.6.075
The purpose of this study was to develop an optimum equipment model considering various objective functions and variables of agricultural reservoir. Traditional optimum function for feasibility assessment is based on economic benefit, but we tried new approach of feasibility assessment based on the number of beneficiary. The data of Yuraimi reservoir and Yongbong reservoir in Yesan-gun such as numbers of related people, construction costs, safe diagnosis have been gathered for applying developed model. Data are used for determining optimum strategy with restricted cost. For verifying results of optimum maintenance, real maintenance data of Yuraimi reservoir were compared with simulated strategy. Results show that simulated maintenance strategies are 3 times more effective than real maintenance data.
Propulsion of Cooperative Tourism Development Model Project and Developing Strategies in Rural Green Tourism village
Rhee, Shin-Ho ; Yoon, Seong-Soo ; Kim, Si-Hwan ;
Journal of The Korean Society of Agricultural Engineers, volume 50, issue 6, 2008, Pages 83~91
DOI : 10.5389/KSAE.2008.50.6.083
This study grasped problems and properties of rural tourism through Cooperative Tourism Development Model Project, so it provided to develop network program and to indicate long-term development direction. This study area was Gubyung-Areum village in Boeun-gun, Chungcheongbuk-do. This village has superior natural landscape and rich area theme. Also, this village was chosen in Areum Village Revitalization Project in 2002, infrastructure full equipment was achieved. Gubyung-Areum village is administering buckwheat flower festival and experience program by Bo-Eun County Office help to change the farm stay village to the rural experience village. But, there were some problems to operate in experience program. So that Chungcheongbuk-do Provincial Government Republic of Korea is propelling Cooperative Tourism Development Model Project for coping these problems from 2007.12.31 to 2008.9.30. This study is going to develop tourism network program that take advantage of enough area resources grasping problem of Gubyung-Areum village through propulsion of Cooperative Tourism Development Model Project. This study present Developing Strategies for Gubyung-Areum village through investigation, analysis and operation process.
Characteristics of Visitor Rural Experience Village using Questionnaire Analyzed - case study for Cheongwongun Cooperative Tourism Model Project -
Yoon, Seong-Soo ; Rhee, Shin-Ho ; Park, Hyung-Soo ;
Journal of The Korean Society of Agricultural Engineers, volume 50, issue 6, 2008, Pages 93~100
DOI : 10.5389/KSAE.2008.50.6.093
The objectives of this study are investigate the satisfaction index and determined the characteristics of visitors. Also present the issues and direction for development of rural-experience village. This study area is seven villages of rural experience in Cheongwongun, Chungcheongbukdo. This place consists rural cooperative tourism model project that is pursued to Cooperative Tourism Model Project by the government. The projects are forming a network of towns and themes to be exhumed. The purpose of this project inner improves the ability of residents and external to contents diversification. This polling in the February-March 2008 was conducted between visitor 330 people. The question is personal information, satisfaction and rural tourism experience of detail as part of a total of 22.