• 한국농공학회:학술대회논문집
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• 한국농공학회 2002년도 학술발표회 발표논문집
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• pp.473-476
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• 2002

The effect of fertiltzer application on ponded and percolation water in rice paddy were investigated at the experimental plots during irrigation period. We laid out three experimental plots such as 150% Excessive, 100% Standard and 70% Reduced. The concentration of T-N and T-P in ponded water were increased rapidly after application. The concentration of T-N and COD in percolated water increased with fertilizer application rates, while T-P concentration were almost constant.

• 한국농공학회:학술대회논문집
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• 한국농공학회 1999년도 Proceedings of the 1999 Annual Conference The Korean Society of Agricutural Engineers
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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.

• 한국수자원학회논문집
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• 제48권6호
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• pp.425-438
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• 2015

본 연구에서는 관개효율의 연별 변화와 필요수량을 고려하여 추정된 관개지구 용수 공급량이 현장에서 실제 공급되는 수량을 잘 모의하는지를 평가하였다. 대상지구로 이동저수지 지구를 선정하여, 2001~2009년 기간에 대한 실측 공급량 자료를 구축하였다. 관개효율, 물꼬높이, 침투량 등 총6개의 매개변수에 대해 민감도 분석, 보정 및 검정을 수행하였다. 민감도 분석결과, 관개효율이 가장 민감한 매개변수로 나타났다. 관개효율은 가장 민감하게 나타난 점과 연마다 값이 달라지는 특징을 반영하여 연별로 보정하였다. 통계적 지표 산정 결과 월단위에 대한 PBIAS, NSE, 그리고 RSR은 보정기간 동안 각각 2.7%, 0.93, 0.26로, 검정기간 동안 각각 3.9%, 0.89, 0.32로 매우 우수하게 나타났다. 따라서 비록 농업용수 공급량은 인위적 요소이나, 적절한 매개변수 값을 사용하여 모의한다면 모의치가 실측치와 유사하게 모의될 수 있을 것이다. 하지만 대상지구의 실측 자료가 확보되지 않아 보정되지 않은 매개변수를 사용하는 경우 결과가 매우 안 좋을 수 있을 가능성이 나타났다. 따라서 농업용수 공급량의 모의 시 적절한 매개변수의 선정은 매우 중요할 것으로 사료되며, 특히 관개효율은 연별로 보정하는 것을 제안한다.

• 생물환경조절학회지
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• 제31권4호
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• pp.279-285
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• 2022

딸기 수경재배 시 일사비례제어를 이용하여 생육단계별 적정 누적일사량 기준을 설정하고자 수행하였다. 급액 방법은 외부 일사량을 기준으로 일정 누적 일사량에 도달하면 급액하였고 누적 일사량 기준은 150, 200J·cm^-2과 생육단계에 따라 200J·cm^-2에서 150J·cm^-2로 변경하는 처리를 두었다. 타이머 제어는 대조구로 설정하였다. 월별 평균 급액 횟수는 누적 일사량이 많은 3월에 150 J·cm^-2과 생육단계별(150J·cm^-2) 처리구가 5.6회, 누적일사량이 적은 12월에 200J·cm^-2과 생육단계별(200J·cm^-2) 처리구가 2.7회, 타이머는 3.6-3.8회였다. 수분이용효율은 주당 총 급액량이 적었던 타이머 처리구가 19.8g·L^-1로 일사제어 처리구에 비해 낮았다. 일사제어에 따른 생육 및 과실 특성은 차이가 없었다. 생육단계별 처리구가 총 상품과 수량은 주당 328g, 상품과율 85.3%로 가장 높았다. 딸기 수경재배 시 일사비례 급액제어 방식은 재배기간 동안 동일한 누적일사량 기준보다 생육단계별로 누적일사량을 조절하는 것이 과실의 수량 향상에 도움이 되었다.

• 한국관개배수논문집
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• 제17권2호
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• pp.28-34
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• 2010

This study re-exams hydrologic stability on spillway outlet capacity of agricultural reservoirs using hydrologic data with current rainfall condition instead of project hydrologic data applied at design on Backgok reservoir located in Chungbuk province. It is concluded that Backgok reservoir is not hydrologically stable and therefore structural measures including the extension of spillway and non structural measures should be taken. Continuous basic plan for river maintenance including additional bank reinforcement to bottom river shall be carried out. Due to high peak flood with more than 290% compared to 200 year frequency probability flood which was design standard of the past in view of the results of calculating PMF according to revised design standard for reservoirs, there could a problem for securing rationality in case of applying PMF with design flood. Therefore, hydrological stability, construction, and maintenance cost shall be synthetically studied and reasonal application shall be made if the decision is made on applying PMF with design flood.

• 한국농공학회:학술대회논문집
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• 한국농공학회 2000년도 학술발표회 발표논문집
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• pp.605-610
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• 2000

The effect of slow release fertilizer application on ponded and percolation water in paddies were evaluated at the experimental plots during irrigation period. We laid out three experimental plots such as standard, 100% slow-release and 80% slow-release. For ponded water, the concentrations of T-N in slow-release plots slowly increase after fertilizing and decrease slowly. The concentration of COD in percolated water was independent of the type of plots. Amount of nitrogen uptake of rice plant in a standard plot was highest at the middle or end of July and was higher than the other plots.

• 한국농공학회:학술대회논문집
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• 한국농공학회 2000년도 학술발표회 발표논문집
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• pp.96-101
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• 2000

Nowadays, everyone emphasis the important of environment. it is found that try to apply using the naturally favorable method when arrange irrigation and drainage channel. But we have no accurate standard of region selection yet. so it is make a many problem. The purpose of this study is the making of standard which is optimal region selection for the creation of the naturally favorable waterfront area. We surveyed data of twenty site in korea where are managed by the KARICO(Korea Agricultural Rural Infrastructure Corporation). We analysed the data using suitable three method(simple adding point method, subjectivity decision method, checklist method) for purpose of this study.

• 한국농공학회지
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• 제29권4호
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• pp.93-105
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• 1987

This Study was carried out at the experimental Plot of Kang-Weon Province, Institute of Agriculture experiment, to find out Irrigation Water requirement and suitable calculating formula of evapotranspiration on Spreading Varieties of rice plant such as Seul Oak, Bokkwang and Teaback in Chuncheon Area. The evapotranspiration, infiltration, and consumptive use of water were measured by Micro Lysimeter for four years from '86yr. Also, yield of rice was investigated during same period. With the Kc Value taken from experimental value, evapotranspiration was calculated by methods of Blaney & criddle, Penman, Hargreaves and Thornthwaite by Computer using meteorological data in Chuncheon Area for twenty one yrs from '66yr to '86yr. All analyses were conducted based on average value of experiment for four years and the results are summarized as follows : 1) The yield by varieties through this experiment showed 1.06 times in Seul Oak, 1.94 times in Bokkwang and 1.89 times in Teaback more than Standard Yield. 2) The consumptive use of water including infiltration were 1.068.4mm in Seul Oak, 1,102. 6mm in Bokkwang and 1,195.6mm in Teaback 3) The evapotranspiration by Actual measurement presented 520.lmm in Seul Oak, 540.lmm in Bokkwang and 598.4mm in Teaback 4)The ratio of evapotranspiration and infiltration over Panevaporation showed 1.2 to 1.4. 5) The irrigation water reguirement by water balance were shown to be irrigated more than 584 mm / yr in average during 21 years from '66yr to '86yr for all Varieties and those for loyr frequency 693 mm in Seul Oak, 712 mm in Bokkwang and 728 mm in Teaback respectively. 6) Crop Coefficient (Ke Value) of the tested rice plant during the period were shown as Table 10. 7) Penman Method was the formula the most close to experiment Value among four different methods of Blaney & Griddle Penman, Hargreaves, and Thornthwaite.

• 농촌계획
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• 제24권4호
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• pp.47-55
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• 2018

Currently in the drought evaluation, which is a supplier-oriented standard that applies storage rates of reservoirs, evaluation for users that use agricultural water is not done. Therefore, this study established drought evaluation items for drought evaluation based on farmers' judgement, conducted a survey on farmers and experts, compared and analyzed weighted value between two groups, and then classified the evaluation standards per each evaluation item. The agricultural drought evaluation items are 5 major items of water supply lapse rate, agricultural weather, agricultural irrigation facility, crop and soil, and 12 subsections for regional characteristics and opinions of consumers that use water to be reflected. The result of analyzing weighted value of farmers and experts' major items shows that farmers is agricultural irrigation facility(0.219), water supply lapse rate(0.211), agricultural weather(0.204), crop(0.183) and soil(0.183). Experts is agricultural weather(0.297), agricultural irrigation facility(0.202), water supply lapse rate(0.189), crop(0.162) and soil(0.150), which displays difference between the two groups. The agricultural drought criteria standards are established based on precedent studies and cases, and grades of evaluation items are 1st grade(extreme stage), 2nd grade(warning stage), 3rd grade(alert stage) and 4th grade(attention stage). The above analysis per each consumer-oriented agricultural drought evaluation item and the analysis on the standards of evaluation grades are expected to be used as a basic resource for establishing agriculture drought policy and selecting drought area in the future.

• Journal of Applied Biological Chemistry
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• 제54권3호
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• pp.218-224
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• 2011

전라북도 서부해안지역(부안군)과 동부 산악지역(진안군, 장수군, 순창군)을 대상으로 328 지점의 농업용 지하수 수질특성을 비교 검토하였다. 조사항목은 지하수법에서 규정하고 있는 농업용수 관리항목인 일반오염물질 4개 항목과 특정유해물질 10개 항목이었다. 전라북도 서부 해안지역에서 일반오염물질의 일종인 염소이온이 기준치를 초과한 지점이 나타났으나, 모든 조사지점에서 농업용 지하수 수질기준을 충족하였다. 특정유해 물질은 거의 모든 조사지점에서 검출한계미만 또는 자연함유량 수준으로 검출되어 안전성이 확보되었다. 농업활동이 활발하고 논과 밭의 경지면적이 상대적으로 넓은 해안 인접 평야지가 중 산간지대 보다 농업용 지하수중 오염물질의 농도가 더 높게 나타나는 경향이었다.