• Title/Summary/Keyword: irrigation priority

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Evaluation of Irrigation Canal Systems by the AHP(Analysis Hierarchy Process) Method (AHP기법에 의한 관개용수로 조직의 평가)

  • 박재흥;김선주;김필식
    • Magazine of the Korean Society of Agricultural Engineers
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    • v.45 no.6
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    • pp.96-108
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    • 2003
  • Agricultural water occupies the largest portion of total water use in Korea, and generally researches on the development of agricultural water have been stressed on the demand of agricultural water itself. But it is unavoidable to change a policy from the development of water resources to cope with the increase of water demand to the effective management of existing water resources. Evaluation of the decrepitude of irrigation facilities and their reasonable maintenance are important for the effective supply and use of agricultural water. Therefore it is necessary to develop evaluation technique that diagnoses the current condition of irrigation canals and suggest a countermeasure to improve the found problems. 25 items in 6 classes were selected for the evaluation of irrigation canal systems, and the weighted value between the items was calculated using AHP (Analysis Hierarchy Process) method. The current condition of the irrigation facilities was evaluated from the class evaluation marks, and ranking was decided from the total marks between the projects, and finally the priority of the project for the improvement was given.

Priority Determination in Nutrient Solution Management in Perlite Culture (펄라이트재배에서의 급액관리의 priority 설정)

  • 김영식
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.5 no.1
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    • pp.7-12
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    • 2004
  • The steps related to the nutrient solution management were divided into 4 categories. The resistance for water movement in every steps was proposed. The priorities among the steps were set according to the cultural situation, which were used as the basis for the management in perlite bag culture. The enhancement of historical root development is especially critical, as well as how to supply essential water efficiently by minimizing the water movement distance to the root, which is the narrowest neck of a bottle in solution management.

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Classifying Agricultural Districts for Prioritizing Groudwater Development Area based on Correlation and Cluster Analysis (가뭄 대응형 지하수 개발 우선순위 선정을 위한 농촌용수구역의 유형 분석)

  • Oh, Yun-Gyeong;Lee, Sang-Hyun;Kim, Ara;Hong, Soun-Ouk;Yoo, Seung-Hwan
    • Journal of Korean Society of Rural Planning
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    • v.26 no.2
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    • pp.51-59
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    • 2020
  • In this study, we analyzed the characteristics of 511 agricultural districts through statistical data, and classify these districts as the vulnerable area to drought through correlation and cluster analysis. The criteria for classification was related to ground-water recharge, irrigation water demand, and water supply. As a result, 8 types of agricultural districts were extracted. For example, the type 1 indicated the high priority area for ground-water development, thus the districts which were classified as type 1 showed ground-water use was less than 80 % of maximum capacity, and irrigation water supply was only 37.5 % and 76.5 % of irrigation water demand in upland and paddy field, respectively. As a result, 44 of 511 districts were classified as type 1.36 districts (types 5-8) were areas where groundwater development is limited. The results of this study are expected to provide useful information for establishing the direction of the rural area development project in connection with the revitalization of policy of people return to rural area.

Decision Making for Priority of Water Allocation during Drought by Analytic Hierarchy Process (계층분석과정(AHP)에 의한 가뭄시 용수배분 우선순위 위사 결정)

  • Lee, Hyun-Jae;Shim, Myung-Pil
    • Journal of Korea Water Resources Association
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    • v.35 no.6
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    • pp.703-714
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    • 2002
  • During drought, there have been a number of conflicts because of the limited and insufficient water to allocate for the numerous water users. To solve the problems, the decision on the priority of water use should be made with social rationality A rational and systematic procedure needs to be implemented in order to decide the priority of water use. First, a criteria level is made of the main and detailed drought impacts which come from the economic, environmental, and social aspects. Four alternatives are then identified for priority of water use. Second, survey to the two group(professional, residents) has been done with using pair wise comparisons. Finally, the relative weights and the priority of alternatives are determined by means of the Analytic Hierarchy Process(AHP) which is one of the Multi-Attributed Decision Method(MADM). By using AHP, it has been concluded that the water allocation during drought should be accomplished in order of domestic, irrigation, industrial, and river maintenance water. If the AHP method were improved for inconsistency which may be generated with survey analysis, a number of applications will be used for the solutions of problem in water resources systems.

Optimized Allocation of Water for the Multi-Purpose Use in Agricultural Reservoirs (농업용 저수지의 다목적 이용을 위한 용수의 적정배분)

  • 신일선;권순국
    • Magazine of the Korean Society of Agricultural Engineers
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    • v.29 no.3
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    • pp.125-137
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    • 1987
  • The purpose of this paper is to examine some difficulties in water management of agricultural reservoirs in Korea, for there are approximately more than 15,000 reservoirs which are now being utilized for the purpose of irrigation, along with the much amount of expenses and labors to be invested against droughts and floods periodically occurred. Recently, the effective use of water resources in the agricultural reservoirs with a single purpose, is becomming multiple according to the alterable environment of water use. Therefore, the task to allocate agricultural water rationally and economically must be solved for the multiple use of agricultural reservoirs. On the basis of the above statement, this study aims at suggesting the rational method of water management by introducing an optimal technique to allocate the water in an existing agricultural reservoir rationally, for the sake of maximizing the economic effect. To achieve this objective, a reservoir, called "0-Bongje" as a sample of the case study, is selected for an agricultural water development proiect of medium scale. As a model for the optimum allocation of water in the multi-purpose use of reservoirs a linear programming model is developed and analyzed. As a result, findings of the study are as follows : First, a linear programing model is developed for the optimum allocation of water in the multi-purpose use of agricultural reservoirs. By adopting the model in the case of reservoir called "O-Bongje," the optimum solution for such various objects as irrigation area, the amount of domestic water supply, the size of power generation, and the size of reservoir storage, etc., can be obtained. Second, by comparing the net benefits in each object under the changing condition of inflow into the reservoir, the factors which can most affect the yearly total net benefit can be drawn, and they are in the order of the amount of domestic water supply, irrigation area, and power generation. Third, the sensitivity analysis for the decision variable of irrigation which may have a first priority among the objects indicate that the effective method of water management can be rapidly suggested in accordance with a condition under the decreasing area of irrigation. Fourth, in the case of decision making on the water allocation policy in an existing multi-purpose reservoir, the rapid comparison of numerous alternatives can be possible by adopting the linear programming model. Besides, as the resources can be analyed in connection with various activities, it can be concluded that the linear programing model developed in this study is more quantitative than the traditional methods of analysis. Fifth, all the possible constraint equations, in using a linear programming model for adopting a water allocation problem in the agricultural reservoirs, are presented, and the method of analysis is also suggested in this study. Finally, as the linear programming model in this study is found comprehensive, the model can be adopted in any different kind of conditions of agricultural reservoirs for the purpose of analyzing optimum water allocation, if the economic and technical coefficients are known, and the decision variable is changed in accordance with the changing condition of irrigation area.

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Assessment of Agricultural Drought Vulnerability Focus on Drought Response Capability in Irrigation Facilities and Paddy Fields (수리시설물 및 농경지 가뭄대응능력 중심의 농업가뭄 취약성 평가 - 태안 지역을 중심으로 -)

  • Mun, Young-Sik;Nam, Won-Ho;Ha, Tae-Hyun;Jo, Young-Jun
    • Journal of The Korean Society of Agricultural Engineers
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    • v.65 no.5
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    • pp.13-24
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    • 2023
  • Due to recent climate change, the amount of rainfall during the summer season in South Korea has been decreasing, leading to an increase in areas affected by frequent droughts. Droughts have the characteristic of occurring over a wide area and being unpredictable in terms of their onset and end, necessitating proactive research to cope with them. In this study, we conducted an assessment of agricultural drought vulnerability in Taean-gun, Chungcheongnam-do, focusing on irrigation facilities and paddy fields. The assessment criteria were meteorological impact, drought occurrence status, supplementary water supply capacity, and drought response capability, with nine specific indicators selected. The drought response capability was analyzed by applying a scoring system as a key component of the agricultural drought vulnerability assessment, while the other indicators were quantified using an entropy weighting technique. The results of the assessment showed that Anmyeon-eup and Taean-eup were the safest areas, while Wonbuk-myeon, Nam-myeon, and Gonam-myeon were the most vulnerable. It is expected that the findings can be utilized to enhance understanding and proactive measures for coping with agricultural drought, and to determine the priority of drought response in different regions.

Development of System Repairing & Reinforcing for Irrigation & Draingage Structure (농업기반 수리구조물의 보수보강 공법 시스템 구축)

  • Kim, Kwan-Ho;Park, Kwang-Su;Kim, Myeong-Won;Lee, Joon-Gu;Kim, Han-Joong
    • Proceedings of the Korea Concrete Institute Conference
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    • 2005.11a
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    • pp.153-156
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    • 2005
  • It is not feasible for agricultural facility managers to estimate how severe damages are and what are causes of them when agricultural hydraulic facilities get damaged for some reasons. Moreover, it is nearly impossible for agricultural facility managers to take immediate actions to repair and reinforce the damaged structures. Thus, there have been needs for well-established systems to help agricultural facility managers understand its severity and causes, and take proper actions to reduce speed of deterioration and to repair/reinforce them. Thus repairing and reinforcing systems of agricultural hydraulic structures based on agricultural facility management policies, developed in this study, can be efficiently used in field works to determine top priority location and the budget of repairing and reinforcing projects if detailed information of damages in concrete structures and damage types are well compiled and classified with standardized image data complemented.

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Development of system repairing & reinforcing for irrigation & draingage structure (농업기반 수리구조물의 보수보강 공법 시스템 구축)

  • Kim, Kwan-Ho;Park, Kwang-Su;Kim, Myeong-Won;Lee, Joon-Gu;Kim, Han-Joong
    • Proceedings of the Korea Concrete Institute Conference
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    • 2005.05b
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    • pp.289-292
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    • 2005
  • It is not feasible for agricultural facility managers to estimate how severe damages are and what are causes of them when agricultural hydraulic facilities get damaged for some reasons. Moreover, it is nearly impossible for agricultural facility managers to take immediate actions to repair and reinforce the damaged structures. Thus, there have been needs for well-established systems to help agricultural facility managers understand its severity and causes, and take proper actions to reduce speed of deterioration and to repair/reinforce them. Thus repairing and reinforcing systems of agricultural hydraulic structures based on agricultural facility management policies, developed in this study, can be efficiently used in field works to determine top priority location and the budget of repairing and reinforcing projects if detailed information of damages in concrete structures and damage types are well compiled and classified with standardized image data complemented.

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An Analysis on the Prospects and Realities of Local Governments' Project Promotions according to the Changes in Financial Policy of Agricultural Infrastructure Improvement Projects (농업기반정비사업의 재정정책변화에 따른 지방자치단체의 사업추진 전망 및 실태 분석)

  • Bae, Seung-Jong;Kim, Dae-Sik;Kim, Soo-Jin;Kim, Seong-Pil
    • Journal of The Korean Society of Agricultural Engineers
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    • v.61 no.5
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    • pp.49-55
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    • 2019
  • This study attempted to investigate the changes in the perception of local government officials about agricultural infrastructure improvement projects due to the financial policy changes. A total of 141 local government officials were surveyed on the priority, the current status of the agricultural infrastructure improvement projects. Irrigation facilities renovation project and Small drainage improvement project had generally high priority, while Support project of cultivation basis for upland crops in paddy, Large scale land readjustment project, and Upland infrastructure improvement project had low priorities. After the introduction of the block grant system, agricultural infrastructure improvement projects had often been conducted by collecting opinions from local residents. The officials in charge of local governments recognized that the agricultural infrastructure improvement projects were reduced due to lack of financial resources and project potential sites. In response to the changes in the agricultural infrastructure improvement projects, most of the surveys showed that the influence of cities and provinces was strengthened. In addition, respondents most needed to improve the subsidy rate and there were a large number of cases requiring differential support to meet the characteristics of the local government. Therefore, it will be necessary to present a new perspective on the agricultural infrastructure improvement projects and to suggest differentiated projects for each regions.

Characteristics of Discharged Loads from Saemangeum Watershed (새만금유역의 배출부하 특성)

  • Jung, Jae-Woon;Jang, Jeong-Ryeol;Choi, Kang-Won;Lim, Byung-Jin;Lee, Young-Jae;Kang, Jae-Hong;Park, Hye-Lin;Cho, So-Hyun
    • KCID journal
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    • v.17 no.2
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    • pp.35-41
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    • 2010
  • For efficient water quality management of Saemangeum lake, it is very important to accurately analyze discharged load characteristics using investigated pollution sources data from Saemangeum watershed. Investigation of pollution sources was conducted from 2003 to 2007. In this study, pollution sources are largely classified into human population, livestock, industry, and land use. Discharged loads of BOD, T-N and T-P from classified pollution sources were calculated by Korea TMDL (Total Maximum Daily Load) technical guideline. The calculated results showed that the major sources of BOD and T-N were land use, human population, livestock, and industry in order. However, the major sources of T-P were livestock, land use, human population, and industry in order. Our results clearly show that pollution sources of the priority management for water quality enhancement in the Saemangeum lake has represented land use and livestock.

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