• Title/Summary/Keyword: Agricultural Water

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An Analysis of Environmental Water Release Patterns Considering Operation Rules in Enlarged Agricultural Reservoirs (둑높이기 농업용저수지의 운영기준에 따른 환경용수 방류패턴 분석)

  • Lee, Sang-Hyun;Yoo, Seung-Hwan;Park, Na-Young;Choi, Jin-Yong
    • Journal of The Korean Society of Agricultural Engineers
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    • v.55 no.3
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    • pp.51-62
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    • 2013
  • The importance of environmental water has been risen in terms of river ecosystem soundness with preventing stream flow depletion in rural area, while enlarging agricultural reservoir project is conducted under the 4 main river restoration project for supplying more water to 4 main rivers. The aim of this study was to estimate the amount of environmental water release and analyze the release pattern during non-irrigation season in enlarged agricultural reservoirs. The 4 reservoirs (Dansan, Samga, Geumbong, Changpyeong) located on the upper region of Nakdong river were simulated applying the operation rule which was determined by release criteria curves. The simulated results indicated that the more environmental water could be released than the spillway release and continuous release was achieved with smaller range of fluctuation. In case of Changpyeong reservoir, average 506.0 thousand $m^3$ environmental water could be released on Feb., and it was about twice as much as the spillway release before the enlargement, and also, the 18 thousand $m^3$/day environmental water could be supplied to a stream consistently after enlargement. From the results, it was expected that the additional environmental water release will improve stream water flow during dry season in terms of quantity and quality of water.

An Evaluation Study on Total Nitrogen(T-N) Item of Agricultural Water Standards (농업용수 수질기준 T-N 항목에 대한 검증 실험( I ))

  • Choi, Seon-Hwa;Kim, Ho-Il;Kim, Min-Ho;Lee, Byeon-U;Lee, Bong-Hun
    • Journal of The Korean Society of Agricultural Engineers
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    • v.46 no.1
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    • pp.99-105
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    • 2004
  • The present agricultural water quality standards are set by a policy goal. This is intended for water quality management of public water resources, but not for the use of water resources. These standards were not determined by considering the influence of water quality on the safety of agricultural produce and the growth, yield and quality of agricultural crops. Thus, this study was carried out to investigate the influence of irrigation water quality on the growth, yield, and grain quality of rice and acquire fundamental knowledges to set up irrigation water quality standards. The pot experiment was conducted with 4 treatments using irrigation waters with various total nitrogen concentrations (control, 1, 5, 10, 20mg/L) and replicated four times with randomized block design. The results of this study showed that plant height, number of tiller, plant dry weight, the uptake of N, P, and K, and rice protein contents tended to increase as the T-N concentration in irrigation water was increased. In addition, grain yield at T-N 20 mg/L was significantly higher than in the control, but the percentage of head rice was slightly lower due to the increase of green kernel and white belly/core kernel.

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.

Feasibility Study on the Reuse of Treated Sewage Effluent for Agrcultural Water (농촌오수 처리수의 농업용수로의 재이용 가능성에 관한 연구)

  • 권태영;윤춘경
    • Proceedings of the Korean Society of Agricultural Engineers Conference
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    • 1999.10c
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    • pp.663-669
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    • 1999
  • The objective of this study are to examine the feasbility of reuse treated sewage effluent ofr agricultural water, and to obtain basic data for estabilishment of rational agricultural water quality standard. From this study, it appears that reuse of treated sewage as a supplemental irrigation water could be feasible and practical alternative for ultimate sewage disposal which often causes water quality problem to the receiving water body. For full scale applicatiion, further study is recommended on the secific guidelines of major water quality components and publc health.

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The re-estimating on the aumount of agricultural water use in Korea (우리 나라 농업용수 이용량의 재산정(관개배수 \circled2))

  • 김현영;심문산
    • Proceedings of the Korean Society of Agricultural Engineers Conference
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    • 2000.10a
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    • pp.157-161
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    • 2000
  • The peculiarity of agricultural water in Korea is taking advantage of the effective rainfall and return flow in consumptive use. The agricultural water which the Ministryof Construction figured out in 1989 was excluded these traits. As a result of the re-estimating amount of agricultural water in 1999, we can presume it up to 14.9 billion m$\^$3/ to 22.6 billion m$\^$3/ per year.

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Development of Agricultural Water Circulation Rate Considering Agricultural Reservoir and Irrigation District (농업용 저수지 및 관개지구를 고려한 농업유역 물순환율 개발)

  • Kim, Seokhyeon;Song, Jung-Hun;Hwang, Soonho;Kim, Hak-Gwan;Kang, Moon Seong
    • Journal of The Korean Society of Agricultural Engineers
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    • v.62 no.2
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    • pp.83-95
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    • 2020
  • The water circulation in agricultural watersheds changes with the operation of agricultural reservoirs, it is necessary to classify and evaluate them into upstream, agricultural reservoirs, irrigation districts, and downstream. Therefore, in this study, we developed the agricultural water circulation rate (AWCR) considering an agricultural reservoir and irrigation district by improving the water circulation rate of the Water environmental conservation Act. we applied it to Jinwi watershed using the module-based hydrologic analysis system to simulate the water circulation for agricultural reservoirs and irrigation areas. The model performance during the validation period was NSE of 0.762 for the downstream stream and 0.682 for the reservoir level. And the hydrograph separation model was applied to separate the direct and baseflow. As a result of this study, The AWCR of Jinwi watershed was 71.8% on average, which was higher than the water circulation rate estimated by the downstream hydrograph separation.

Quality Control on Water-level Data in Agricultural Reservoirs Considering Filtering Methods (필터링 기법을 이용한 농업용저수지 수위자료의 품질관리 방안)

  • Kim, Kyung-hwan;Choi, Gyu-hoon;Jung, Hyoung-mo;Joo, Donghyuk;Na, Ra;Choi, Eun-hyuk;Kwon, Jae-Hwan;Yoo, Seung-Hwan
    • Journal of The Korean Society of Agricultural Engineers
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    • v.63 no.5
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    • pp.83-93
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    • 2021
  • Agricultural reservoirs are important facilities for storing or managing water for the purpose of securing agricultural water, creating and expanding agricultural production bases, and using them to increase agricultural production. In particular, the Korea Rural Community Corporation (KRC) manages agricultural reservoirs scattered across the country, and officially recognizes and distributes hydrological data to increase their public utilization and aims to improve the value of water resources. Data on the water level of agricultural reservoirs are important. However, errors such as missing values and outliners limit utilization of the data in various fields of research and industry. Therefore, water quality data measures should be devised to increase reliability. this study categorized different error types and looked at automatic correction methods to enhance the reliability of the vast hydrological data. In addition, the water level data corrected from errors were compared to the reference hydrologic data through expert judgment in accordance with the quality control procedure, and the most appropriate measures were verified. As KRC manages more agricultural reservoirs than any other institution, the proposed method of efficient and automatic water level data correction in this study is expected to increase the availability and reliability of the hydrological data.

The Evaluation of Integrated Agricultural Resource Management Policy through Water-Energy-Food Nexus - An Application to Management of Aquifer Recharge Project - (물-에너지-식량 넥서스를 활용한 통합적 농업자원관리정책 평가 - 지하수 함양 사업을 중심으로 -)

  • Sung, Jae-hoon;Lee, Hyun-jung;Cho, Wonjoo
    • Journal of Korean Society of Rural Planning
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    • v.25 no.4
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    • pp.35-45
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    • 2019
  • Korean agriculture experienced rapid changes in its production structure to respond fluctuations on external conditions, and these changes have increased the dependence between agricultural resources and negative environmental externalities from agricultural production. As a tool for managing agricultural resources and reducing negative environmental effects from agricultural production, this study employs water-energy-food nexus for integrated resource management. To show the necessity of an integrated approach, this study evaluated three policy scenarios including changes in capital interest, water capacity, and energy cost. The results show that three scenarios have unintended consequences for farmers' incomes and their use of resources. Also the unintended consequences of government policies also affected farms' vulnerability to environmental changes. In particular, the expansion of financing for the establishment of non-circulating water curtain facilities did not have a significant effect on the crop switching of farms. In addition, increasing the amount of available water through the aquifer recharge project leads to the installation of non-circulating water curtain facilities in zucchini farm. It raises dependence on groundwater in agricultural production, thereby increasing farmers' vulnerability to groundwater shortages. These results imply that the agricultural sector needs to consider the interrelationship between agricultural resources when designing or evaluating policies.

On the Linkage Between Irrigation Facilities and Rice Production Under Drought Events (가뭄사상 및 농업수리시설물이 쌀 생산량에 미치는 영향에 대한 상관 분석)

  • Woo, Seung-Beom;Nam, Won-Ho;Jeon, Min-Gi;Yoon, Dong-Hyun;Kim, Taegon;Sung, Jae-Hoon;Kim, Han-Joong
    • Journal of The Korean Society of Agricultural Engineers
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    • v.63 no.5
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    • pp.95-105
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    • 2021
  • Drought is a disaster that causes prolonged and wide scale damage. Recently, the severity and frequency of drought occurrences, and drought damage have been increased significantly due to climate change. As a result, a quantitative study of drought factors is needed to better understand and prevent future droughts. In the case of agricultural drought, several existing studies examine the economic damage caused by droughts and their causes, but these studies are not well suited to estimating crop-oriented agricultural drought damage and the factors that absolutely affect agricultural drought. This study determines which factors most affect agricultural drought. It examines meteorological factors and those related to agricultural water supplied by irrigation facilities. Rice paddy production per unit area is lower than the average from the last two years where agricultural drought occurred. We compare the relative frequency of agricultural drought impacts with irrigation facilities, effective reservoir storage, the number of water supply facilities, and the meteorological drought index such as Standardized Precipitation Index (SPI). To identify factors that affect agricultural drought, we correlate rice paddy production anomalies with irrigation water supply for the past two years. There was a high positive correlation between rice paddy production and irrigation water usage, and there was a low or moderate negative correlation between rice paddy production anomalies compared to the average of the past two years and SPI. As a result, agricultural water supply by irrigation facilities was judged to be more influential than meteorological factors in rice paddy production. This study is expected to help local governments establish policies related to agricultural drought response.

Estimation of Available Permit Water for Large Scale Agricultural Reservoirs in Youngsan River Basin (영산강권역 대규모 농업용 저수지의 가용허가수량 추정)

  • Kim, Sun-Joo;Park, Ki-Chun;Park, Hee-Sung
    • Journal of The Korean Society of Agricultural Engineers
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    • v.54 no.1
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    • pp.93-97
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    • 2012
  • Agricultural water reservoirs upstream of the intake on the basis of the intaking water volume is being made. Therefore, the supply capacity of reservoirs are not considered when the water balance analysis, storm water reservoirs are based on agriculture and further secured by the reservoir water is not used to using natural river water analysis. To overcome these problems can supply reservoirs are available to permit analysis of how much the quantity of water balance analysis, it should be reflected in the line to help. In this study, the natural daily flow data and apply the dimensions of the reservoir, and for more than 30 years of the long-term water balance analysis conducted by Date Youngsan river basin can supply reservoirs are large quantity of permits available is presented.