• 한국관개배수논문집
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• 제14권2호
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• pp.214-224
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• 2007

This study was carried out to investigate of water quality and irrigation water use possibility of reservoirs near Saemangeum for upland and horticultural fields. Water samples were taken at 6 reservoirs for 5 months from June, 2006 to November, 2006. The water temperature, pH, EC, EC, chlorophyll - a of 6 reservoirs were ranged 8.7-$31.2^circC$, 6.9-9.2, 73.0-637.0$\mu$S/cm, 0.9-443.2mg/$m^3$, respectively. The concentration of DO, BOD, COD, T-N, T-P and SS were ranged 5.7-11.7mg/L, 0.5-8.9mg/L, 2.9-18.0mg/L, 0.07-6.52mg/L, 0.002-0.406mg/L, 0.5-54.0mg/L Also, storage ratio and storage capacity of Mije reservoir, Okgu reservoir, Oknyeo reservoir, Neungje reservoir were decreased between June and April, but those of Oksan reservoir was kept high during irrigation period. Water supply of reservoirs was 4,474,100$m^3$(Oksan), 6,165,900$m^3$(Mije), 13,209,900$m^3$(Okgu), 4,675,600$m^3$(Oknyeo), 7,682,000$m^3$(Neungje), 19,231,000$m^3$(Cheongho) in 2006, respectively. It is resevoirs for upland and horticultural fields that use main irrigation water resources before Saemanguem fresh-water lake development, and use assistance irrigation water resources in emergency after Saemanguem fresh-water lake development. In the meantime, for continuous use of reservoir as irrigation water resource for upland and horticultural fields, we must examine about surplus water capacity, and need investigation about supply possibility of irrigation water, condition of irrigation water, water quality.

• 한국농공학회:학술대회논문집
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• 한국농공학회 2003년도 학술발표논문집
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• pp.603-606
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• 2003

This study was carried out to investigate the effects of T-P concentrations in irrigation water on the growth, yield, and grain quality of rice. It acquire fundamental knowledges to set up irrigation water quality standards. The pot experiment was conducted with 5 treatments using irrigation waters. It consisted of various total phosphorus concentrations(control, 1, 2, 5, 10mg/L) and replicated four times with randomized block design. The results of this study showed that as T-P concentrations in irrigation water increases, plant height tended to increase. Dry weight of rice plant at T-P 10mg/L was significantly higher than the control. However, T-P in irrigation water did not affect plant height, tiller number, plant dry weight, yield, and quality of rice.

• 아시안잔디학회지
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• 제26권2호
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• pp.123-128
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• 2012

Kentucky bluegrass 는 경기장과 골프장의 Tee 나 Fairway 등에 가장 많이 사용이 되는 한지형잔디 초종중의 하나이다. 그러나 Kentucky bluegrass 는 뿌리층이 얕고 그늘에 약한 단점들이 있다. Kentucky bluegrass 의 가장 큰 단점중의 하나는 성장을 위해 수분이 많이 요구되는 초종이다. 올바른 수분관리는 잔디의 시각적 색감과 품질을 유지하기 위해 아주 중요한 요소중의 하나이다. 잔디의 성장을 위해 수분을 공급하는 관수 방법에는 light and frequent (LI) 적은양을 빈번하게 관수하는 방법과, deep and infrequent (DI) 많은양을 필요시에 공급하는 두가지의 방법이 있다. 본 실험은 Kentucky bluegrass 의 생육을 위한 관수빈도의 차이를 알아보기 위해 수행되었다. 실험을 위해 무관수, 매주 4회, 그리고 매주 1회의 3가지 관수방법이 사용되었다. 무관수 처리구의 경우 인위적인 관수는 수행되지 않았으며 Kentucky bluegrass 의 생육을 위해 수분공급은 강수량에 의해서만 이루어졌다. 본 실험결과 2011년 기상조건하에서 강우량에 의존한 무관수는 7,8 월에 최소수용품질을 나타내기 어렵다고 판단되며, 관수빈도에 따른 Kentucky bluegrass 생육의 차이는 나타나지 않는 것으로 나타났다.

• 한국수자원학회논문집
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• 제45권9호
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• pp.929-941
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• 2012

최근 농업용저수지를 포함한 농촌지역 하천의 친수활동이 증가하면서 농촌수계의 경관, 수질 및 생태보전 등 환경에 대한 관심이 고조되고 있고, 이로 인해 농촌지역 용수수요 다변화와 물 부족 심화현상 등을 해결할 수 있는 수자원 개발의 필요성이 증대되고 있다. 이러한 측면에서 4대강 살리기 사업의 일환으로 추진되는 농업용저수지 둑높이기 사업은 추가로 필요한 농업용수뿐만 아니라 하천 수질개선을 위한 하천유지용수 확보를 위해 필요한 사업임에도 불구하고 운영계획 및 운영방안이 명확하지 않은 실정이다. 따라서 본 연구는 낙동강의 특정 소유역을 대상으로 농업용저수지 둑높이기 사업을 통해 확보할 수 있는 추가 저수량을 검토하였고 저수지 운영방안에 따라 하천유지용수로 방류할 경우 하류하천 수질개선효과를 평가하고자 하였다. 저수지 운영시나리오에 따른 추가적인 물공급량 확보는 하류하천 수량과 수질에 영향을 줄 것으로 예측되었으며 유량은1~8%의 증가효과와2~10%의수질개선효과를나타냈다. 특히, 저수지 운영상 2월에서 4월 사이에 추가로 방류를 실시할 수 있으며, 하천의 수량 및 수질 개선에 효과적인 것으로 나타났다. 그러나 농업용저수지의 수질은 지류하천뿐만 아니라 낙동강 본류 수질에 큰 영향을 미칠 수 있기 때문에 저수지 수질개선 및 관리가 중요할 것으로 판단된다.

• 한국농공학회논문집
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• 제57권4호
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• pp.113-120
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• 2015

The objectives of this study were to monitor and assess the effects of saline irrigation water on lettuce and carrot growth in protected cultivation. One control and 4 treatments with three replications, which were differentiated according to the level of salinity in irrigated water, were employed for each vegetable to assess the effects of the irrigation with saline water. Monitoring results showed that the use of irrigation water containing above a certain level of salinity was found to cause excessive accumulation of salts in the soil as saline irrigation water increased electrical conductivity (EC) and sodium ($Na^+$) content in both lettuce and carrot soil samples, while tap water irrigation used as control decreased the salinity in the samples. The salinity higher than the threshold level of irrigation water was found to reduce the yields of lettuce and carrot, while in less than the threshold level the higher the salinity of the irrigation water increased the yields. The salinity of the irrigation water also appeared to increase the internal salinity of the plant as the $Na^+$ content in plant increased as the salinity of irrigation water increase. Increased $Na^+$ content was analyzed to be able to increase the sugar content in carrot. This study could contribute to suggest water quality criteria for safe use of saline water in protected cultivation, although long-term monitoring is needed to get more representative results.

• 한국물환경학회지
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• 제32권2호
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• pp.183-190
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• 2016

Monitored data (rainfall runoff and water quality) from 4 different paddy sites over 3 years were compared to analyze the effect of irrigation water management on irrigation supply and rainfall runoff quality in Korea. The system of rice intensification water management was adopted at one site (SRI) while the conventional water management method was used for rice culture at the other three sites (CT, SD and HD). The soil texture at SRI, CT and SD was sandy loam while that at HD was silt loam. The average reduction of irrigation supply at SRI compared with CT, SD and HD during the 3 years studied was 49%, 51% and 55%, respectively. The average event mean concentration (EMC) at SRI compared with that at CT, SD and HD was decreased by 35% (BOD), 44% (COD), 47% (SS), 19% (TN) and 38% (TP). The correlation between rainfall runoff and the measured non-point source (NPS) pollutants was very good in general. The comparison revealed that SRI water management significantly reduced both irrigation supply and EMC in rainfall runoff. Paddy NPS pollution was closely related to factors that induce runoff such as rainfall and irrigation supply. It was concluded that SRI management could be an effective and practical option to cope with both water shortage due to climate change and water quality improvement in rural watersheds. However, further studies are recommended in large irrigation districts for use in the development and implementation of NPS pollution policies since the data was collected from field sized paddies.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2017년도 학술발표회
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• pp.198-198
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• 2017

Climate change causes unpredictable and erratic climatic patterns which affects crop production in agriculture and threatens public health. To cope with the challenges of climate change, sustainable and sound growth environment for crop production should be secured. Recent attention has been given to the development of smart irrigation system using sensors and wireless network as a solution to achieve water conservation as well as improvement in crop yield and quality with less water and labor. This study developed the smart irrigation technique for farmlands by monitoring the soil moisture contents and real-time climate condition for decision-making support. Central to this design is micro-controller which monitors the farm condition and controls the distribution of water on the farm. In addition, a series of laboratory studies were conducted to determine the optimal irrigation pattern, one time versus plug time. This smart technique allows farmers to reduce water use, improve the efficiency of irrigation systems, produce more yields and better quality of crops, reduce fertilizer and pesticide application, improve crop uniformity, and prevent soil erosion which eventually reduce the nonpoint source pollution discharge into aquatic-environment.

• 한국농공학회지
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• 제41권2호
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• pp.44-54
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• 1999

Agricultural water quality standards were reviewed through rice culture using treated sewage irrigation . The seqage from school building of Konkuk University was treated by a constructed wetland system, and theeffluent of the systeml was irrigated for rice culutre after nutrient concentration adjusted by dilution. Average concentration of COD, SS, T-N and T-P in irrigated water was 22.3mg/$\ell$, 6.5mg/$\ell$, 25.8 mg/$\ell$and 2.2mg/$\ell$, respectively. Treatment include irrigation of adjusted effluent with conventional fertilization (TWCF), adjusted effluent with no fertilization (TWNF). and effluent of the wetland system as it was with no fertilization (SWNF). These treatment plots were compared with control plot irrigated by tap water with conventional fertilization (CONTROL). Other environmentals for rice culture were identical for all the plots. Among them, TWCF showed the best growth rate and the highest yield, and constituents in the harvested rice showed not much difference among them. Which implies that irrigation with relatively high nutrient concentration compared to the current water quality standards may cause no adverse effect on rice culture and could be even beneficial . Although T-N for this study was 25 times greater than the current standards, rice culture wasnot adversely affected by irrigatino water quality and even beeter results were observed than the CONTROL. It could be mistakenly that clean irrigation water produces better agricultural product, however, it is not necessarily true. Irrigation water with moderate nutrient concentration can enhance the plant growth, and better result might be expected. Therefore, peer review and modification if necessary are needed to the current agricultural water quality standards, especially for the nutrient components.

• 한국습지학회지
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• 제25권4호
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• pp.297-305
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• 2023

순환관개는 농업유역내 하천수를 상류의 농경지로 재투입시켜 관개용수로써 활용하고 기 사용된 용수는 직접유출 또는 기저유출의 형태로 하천으로 회귀되는 관개방식이다. 순환관개는 용수 및 양분 확보 측면에서 장점이 크지만 순환관개 후 발생하는 회귀수는 과투입된 양분을 함유하고 있어 하천 수질에 악영향을 미칠 것으로 예상된다. 따라서 순환관개에 따른 하천 수질변화에 대한 정량적 분석은 효율적인 농업용수 공급과 수질관리대책 수립을 위해 반드시 필요하다. 유역내 수문 및 오염물질의 순환, 그리고 하천수질에 대한 정량적 영향을 통합적으로 분석하기 위하여 유역모델이 주로 활용되고 있으나 대부분의 유역모델들은 순환관개에 의한 수질 영향을 모의할 수 있는 기능을 제공하고 있지 않다. 이에 본 연구에서는 HSPF(Hydrological Simulation Program-Fortran) 유역모델과 다중 저류지 모델(Multi-reservoir model)을 연계하여 순환관개 시스템 운영에 따른 하천수질 영향을 분석하고자 하였다. 연구 대상 지역은 경상남도 창녕군 계성천 유역내 순환관개를 시행하고 있는 관곡천 소유역으로 농업활동에 의한 오염물질 배출이 주된 지역이다. 먼저 계성천 및 관곡천을 대상으로 구축된 HSPF모델을 활용하여 관개지역에서의 배출수(직접유출 및 기저유출) 및 하천수에 대한 연간 유량 및 수질 변화 시계열 자료를 생성하고 이를 토대로 자체 구축한 다중저류조 모델을 보정한 후 순환관개 모의에 사용하였다. 다중 저류지 모델에서 관곡천 유역을 관개지역과 관곡천 등 두 개의 하위시스템으로 구성하고 순환관개에 따른 하위시스템내 반응(식물흡수, 흡탈착, 및 소멸) 및 하위시스템 간 물 및 물질(질소 및 인)전달 관계를 모의할 수 있도록 하였다. 최종적으로 순환관개 운영 유무에 따라 총 3개의 시나리오를 구성하여 연간 순환관개용수량 변화에 따른 관곡천 수질영향을 분석하였다.

• 한국물환경학회지
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• 제20권6호
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• pp.597-602
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• 2004

Field experimental study was performed to examine characteristics of nutrient export from paddy rice fields with irrigation practices. Experimental fields with surface-water and ground-water irrigation were monitored and analyzed during rice culture period. The water balance showed that outflow generally balanced the inflow showing that about half (58~68%) of total outflow was lost by surface drainage. Water and nutrient export are more in surface-water irrigation paddy than in ground-water irrigation paddy. The reasons might be more irrigation water available and easy to use in surface-water irrigation. If irrigation water reduced, it could result in reduction of nutrient export in paddy rice fields, which can save water and protect water quality. However, deviation from conventional standard practices might affect the rice yield and further investigations are necessary.