• 한국농공학회논문집
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• 제57권6호
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• pp.125-130
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• 2015

Field study was carried out to assess the effect of automatic inlet and filtration outlet to reduce non-point source discharge and save agricultural irrigation water from paddy. The comparison of control and treated plots showed that irrigation water was saved up to 58 mm and discharge water was reduced up to 110 mm. The filtration outlet improved the discharge water quality for SS, COD, TN and TP up to 60.1 %, 0.1 %, 4.5 %, and 26.0 %, respectively. Overall, the findings of this study indicated that non-point source pollution discharged from paddy fields where automatic inlet and filtration outlet were installed could be reduced 266.3 kg/ha/yr in SS, 10.3 kg/ha/yr in COD, 1.22 kg/ha/yr in TN, and 0.10 kg/ha/yr in TP, respectively. This clearly showed that the automatic inlet and filtration outlet are effective management method for saving of agricultural water and protecting water environment.

• 농촌계획
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• 제29권4호
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• pp.27-34
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• 2023

Recently, worldwide to respond to climate change and secure sustainability. Korea aimed to increase water use efficiency by implementing integrated management according to the water management unification policy. Therefore, the necessity of establishing and operating governance is expanding to ensure the sustainability of agricultural water. In this study aims to evaluate the importance of agricultural water governance components and provide essential data for the participation of stakeholders in the efficient use of agricultural water in Korea. For this study, a total of 19 respondents to the ANP survey for this study were composed of experts in agricultural water and governance in Korea. As a result, the ranking for the main components was in the order of law, policy, and systems(0.222), core subjects(0.191), information sharing and communication(0.180), budget support(0.178), mutual learning(0.124), and external experts(0.105). The most important components for the operation of agricultural water governance are laws, policies, and systems. Since Korea's agricultural water management is a public management system, national standards are considered the first priority. This study, which is the purpose of the agricultural water governance model, evaluated the importance of the constituent components for participating in demand management with a sense of responsibility. Moreover, if agricultural water governance is expanded nationwide by reflecting agricultural and water resource policies in the future, it is believed that positive effects can be achieved in increasing utilization efficiency and securing sustainability through agricultural water saving.

• 한국작물학회지
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• 제42권6호
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• pp.706-711
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• 1997

벼 건답직파재배에서 권개수 부족시 합리적인 최소 권수방법을 밝히고자 전북통(미사질양토)에서 동진벼를 공시하여 5일 간격 고량관개, 10일간격 고랑관개, 15일 간격 고랑관개, 10일 간격 전면관개를 관행 물관리 방법과 비교하여 시험한 결과를 요약하면 다음과 같다. 1. 권개용수량 절감은 관행에 비해 15일간격 고랑관개(92.4％)>10일 간격 고랑관개(88.5％)>10일 간격 전면관개(78.6％)>5일간격 고랑관개 (58％) 순이었다. 2. 고랑에서 90cm까지는 고랑 관개후 5일에도 수분장력이 -50kpa 이하였으나 고랑에서 120cm는 고랑 관개후 4일에도 -70kpa 이상이었다. 3. 엽면적과 지상부 건물중은 관개 간격이 길수록 적었다. 4. 간장은 관행에 비해 관개 간격이 길수록 짧았으며, 전체 간장에 영향을 미친 절간은 상위 제1,2절간이었다. 5. 관개 간격이 길수록 수수 및 등숙비율이 낮아, 쌀수량은 관행관개(5.32MT/ha)에 비해 5일 간격 고랑관개는 5％, 10일 간격 전면 관개는 8％ 감수하였으나, 10일 간격 고랑관개는 18％, 15일 간격 고랑관개는 28％의 유의적인 감수를 보였다. 이상의 결과로 보아 벼 휴입건답직파 재배에서 권개수가 부족시에도 최소한 5일간격 고랑관개나 10일간격 전면관개는 되어야 할 것으로 생각되며, 이러한 결과는 관개수가 부족할 경우에도 합리적인 휴입건답직파 재배의 물관리 기술로 이용될 것으로 기대된다.

• 한국토양비료학회지
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• 제46권5호
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• pp.313-321
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• 2013

The Average daily PET (Potential evapotranspiration), evaluated based on the last 30 years meteorological data and the lysimeter experiment carried out by RDA during 11 years, of 9 regions in Korea for the tomato cultivated in greenhouse, was $3.41mm\;day^{-1}$. Two kinds of water saving irrigation standard (WSIS), deficit irrigation standard (DIS) and partial root-zone drying irrigation standard (PRDIS) that include the irrigation interval and the amount of irrigation water according to the region, soil texture and growing stage, were established. According to the DIS and PRDIS, the cultivator can save water up to 29.2% and 53.7%, respectively, for tomato cultivation in greenhouse compared to the full irrigation standard (FIS) which established in 1999. WSIS can be used easily by the cultivator without complicate procedures such as soil sampling and measurement of soil water status by expensive sensors. But the cultivator should care about irrigation method such as PRDI (partial root-zone drying irrigation) without yield decrease.

• 농업과학연구
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• 제38권2호
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• pp.331-341
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• 2011

To provide variation of water supply for instream flow from reservoirs with various magnifications of paddy irrigation area to watershed area, 8 reservoirs were selected to draw operation rule curve and to analyze water supplies from reservoirs. Reliability of 90% for supplying irrigation water from reservoir was able to maintain and instream flow water was able to be supplied only in the reservoir with magnification of paddy irrigation area to watershed area above 3. The more magnification of paddy irrigation area to watershed area increased, the more ratio of irrigation water to total water storage decreased, and the more ratio of instream flow water to total water storage increased. From the heightening 113 reservoirs in Korea, annual irrigation water was estimated to 1,146.05 $Mm^3$ in normal operation, 839.57 $Mm^3$ in withdrawal limited operation, and annual instream flow water was estimated to 149.68 $Mm^3$ in normal operation, 283.19 $Mm^3$ in withdrawal limited operation. It was concluded that withdrawal limited operation was followed to have the premise of saving irrigation water, more instream flow water was able to be supplied from reservoirs with high magnification of paddy irrigation area to watershed area.

• 한국농공학회지
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• 제45권5호
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• pp.67-76
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• 2003

The principal operation rule of irrigation reservoir is to accelerate the water use and supply water actively when water is sufficient, and to restrict water use and supply water deficiently in order not to stop the irrigation activity when water is scarce. In drought seasons. water should be saved in order to keep the reservoir not to be dried up during the irrigation season. It is important to know how much water should be saved, depending on the rice-growing season and water storage volume. For the drought control of irrigation reservoirs. the rotational irrigation scheduling in paddy with the operation rule curve developed in this study could be utilized as a software program to install TM/TC system for irrigation water supply by automation facilities.

• 한국농공학회지
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• 제43권5호
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• pp.83-92
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• 2001

As a result of the recent water resources crisis, development of water management automation system becomes important. This system should be developed with open architecture in order to flexibly meet the spacial and time change of irrigation water demand. Thereby, water management automation system requires open architecture and suitable software program. This study presents an application of object-oriented methodology for Open Water Management Program(OWMP). Accordingly, OWMP provides a high degree of reliability which allows modification of parameters by change of region or time to be possible. OWMP consists of Data Base Management System(DBMS) and Model System. DBMS makes it possible to analyze data related with planning water schedule and establishing database. Model System calculates reservoir inflow, reservoir effluent and basin water demand. An operator decides the reservoir operation with results of Model System and DBMS. OWMP could be adapted to the planning and decision for saving water.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제13권6호
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• pp.2925-2948
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• 2019

In order to improve the utilization of irrigation water resources of greenhouse tomatoes, a water-saving irrigation decision-making model based on genetic optimization T-S fuzzy neural network is proposed in this paper. The main work are as follows: Firstly, the traditional genetic algorithm is optimized by introducing the constraint operator and update operator of the Krill herd (KH) algorithm. Secondly, the weights and thresholds of T-S fuzzy neural network are optimized by using the improved genetic algorithm. Finally, on the basis of the real data set, the genetic optimization T-S fuzzy neural network is used to simulate and predict the irrigation volume for greenhouse tomatoes. The performance of the genetic algorithm improved T-S fuzzy neural network (GA-TSFNN), the traditional T-S fuzzy neural network algorithm (TSFNN), BP neural network algorithm(BPNN) and the genetic algorithm improved BP neural network algorithm (GA-BPNN) is compared by simulation. The simulation experiment results show that compared with the TSFNN, BPNN and the GA-BPNN, the error of the GA-TSFNN between the predicted value and the actual value of the irrigation volume is smaller, and the proposed method has a better prediction effect. This paper provides new ideas for the water-saving irrigation decision in greenhouse tomatoes.

• 한국토양비료학회지
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• 제43권5호
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• pp.540-545
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• 2010

본 연구는 시설재배오이의 적정 관개시점의 평가를 통한 물 관리 방안을 설정하기 위하여 수행하였다. 경기도 연천군 전곡읍 소재의 오이 시설재배 농가에서 Tensiometer를 이용한 자동관개시스템을 구축하고, 이를 이용하여 관개시점이 15, 20, 30, 40 kPa인 4개의 처리구를 두어 일반농가의 관행 관개방법과 비교하여 오 이의 생산력과 물의 이용효율을 평가하였다. 관개방법에 따른 오이과실의 수량과 당도는 통계학적 차이는 없었으나 15 kPa보다 20, 30 kPa, 관행 처리구에서 각각 수량이 6%, 7%, 9% 높게 나타냈으며, 과실의 당도는 30 kPa 처리구에서 가장 높은 값인 4.1$^{\circ}brix$, 관행과 40 kPa에서 가장 낮은 값인 3.7 $^{\circ}brix$를 나타냈다. 건물중은 30 kPa에서 가장 큰 값을 나타내었으며 15, 20, 30 40 kPa처리구의 식물체 수분함량은 92, 86, 85, 84%로 조사되었다. 오이의 생육 기간 중 사용된 관개량은 관행 > 15 kPa > 20 kPa > 30 kPa > 40 kPa 순이었으며, 절수율은 관행을 기준으로 15 kPa 처리구에서 46%, 20 kPa 처리구에서 48%, 30 kPa 처리구에서 58%, 40 kPa 처리구에서 69%가 절약되었다. 1 kg의 과실을 생산하는데 사용되는 물이용률은 관행이 가장 비효율적이며, 관행에 비해 15, 20, 30, 40 kPa처리구가 관행구보다 36~67%정도 물이 적게 사용되었다. 과실수량과 당도 등에 처리별 유의한 차이가 없으므로 30~40 kPa수준으로 관개 시점 설정 시 60%이상의 물절약이 가능 할 것으로 판단된다.

• 한국농공학회:학술대회논문집
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• 한국농공학회 2005년도 학술발표논문집
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• pp.7-13
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• 2005

There are two ways to mitigate the drought. One is the structural measures such as storage of irrigation water, development of emergency wells, etc. The other one is the nonstructural measures such as water saving management by the early warning system. To precast and evaluate the drought, we need to develop the drought indices for agriculture. In the present drought preparedness plans of Ministry of Agriculture and Forestry (MAF), it is prescribed that the preparedness levels should be classified by considering the precipitation, reservoir storage, soil moisture in paddy and upland, and the growing status of crops. However there are not clear quantitative criteria for consistent judgment. This shows that we have not selected and utilized the proper drought index for agriculture and we did not have the information system to calculate the drought indices periodically and warn the outbreak of the drought. The objectives of the study are to develope of Agricultural Drought Evaluation System and to evaluate this indices for current agricultural status using the system.