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이광야,김해도,정광근 한국농공학회 2005 한국농공학회 학술대회초록집 Vol.2005 No.-
In national prospective, the needs to develop water resources has been increased due to water shortage from diverse use of water resources in agricultural areas. Existing agricultural water demand, which has mainly been limited to the use of farming, are now expanding to diverse water uses such as supporting daily lives, diluting environmental pollution as well as industrial use for agricultural complex currently under construction in agricultural region. In this situation, for the sake of effective procurement of water resources and supply method, it is definitely required to enhance the effectiveness of budget investment and project proceedings through integrated re-development which links projects to strengthen existing dams, reservoirs and hydraulic facilities. The major scopes of this research includes developing different types of system such as selecting potential sites to re-construct reservoirs including generating base maps and thematic maps, data collection regarding water demands and reservoir status; analyzing reservoir data; estimating developable capacity and index calculation; and forecasting inundated areas. In addition, this study provides other products such as developing output generation system which can support wide use of data built and analyzed; database generation for better data management; data analysis including selection, extraction, indexation, and calculation of base items through standardization; data security system prohibiting exterior proliferation and malicious manufacturing of data.
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물수요 중심 용수공급시스템 활용을 위한 국내 농업용수 공급체계 분석
이광야,최경숙 경북대학교 농업생명과학대학 2013 Current Research on Agriculture and Life Sciences Vol.31 No.2
This study analyzed agricultural water distribution systems for the utilization of water demand-oriented water supply systems. Three major TM/TC(telemeter/telecontrol) districts of agricultural water management were selected for analyzing the characteristics of the water distribution systems. In addition, the characteristics of the water supply systems for general water supply zones based on irrigation facilities were also investigated, along with the case of special water management during the drought season. As a result, high annual and monthly variations were observed for the water supply facilities, including the reservoirs and pumping stations. In particular, these variations were more obvious during the drought season, depending on the type of facility. The operations of the pumping stations and weirs were more sensitive to the stream levels than the reservoirs, and the smaller reservoirs were influenced more than the larger reservoirs. Therefore, a water-demand-oriented water supply system should consider the existing general practices of water management in the agricultural sector, and focus on achieving a laborsaving system rather than water conservation in the case of reservoirs. Equal water distribution from the start to the end point of irrigation channels could be an effective solution for managing pumping stations.
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이광야,엄명철,조재원,정해진,Lee, Gwang-Ya,Eom, Myeong-Cheol,Jo, Jae-Won,Jeong, Hae-Jin 한국농공학회 2004 한국농공학회논문집 Vol.46 No.1
Hourly monitoring data from Saemangeum estuary, which is expected to become freshwater, was analyzed to evaluate the water quality characteristics. Higher algal growth at spring season than winter influenced the high ratio of organic nitrogen to total nitrogen and concentration of chemical oxygen demand (COD). About 87.9% and 59.7% of organic nitrogen was observed at winter season and spring season, respectively. Daily salinity analysis at the mouth of two main rivers demonstrated that the Dongjin in river was more influenced by tidal effect and showed higher variation than the Mankyung river. The ratio of nitrogen to phosphorus (N/P ratio) was different with site (estuary versus sea area) and season (winter versus spring) remarkably. The N/P ratio was highest (32.74 ∼ 43.93) at estuary in winter and was lowest (1.78 ∼ 3.06) at sea in spring. The high N/P ratio at estuary area implies that phosphorus can be the limiting nutrient factor for algal growth as in general freshwater river, therefore, water quality management practice considering river characteristics rather might be needed in the Saemangeum estuary. The Saemangeum project is nationally recognized for its environmental issues, and especially water quality concern is a critical factor to make policy decision and further assessment with continued monitoring is strongly recommended.
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이광야,박진철,유찬,김해도,정광근,윤성욱,백승환,이정훈 경상대학교 농업생명과학연구원 2008 농업생명과학연구 Vol.42 No.1
To improve the capacity of reservoir and the ability of mitigation on natural hazards of agricultural small dam, the model of tainter gate which could be installed on spillway was developed and pilot-scale test was carried out to evaluate the performance of gate with quantity and velocity of flood. In the design of gate, it was shown that the ratio of gate shape was appropriate in the range of 1.00~1.45(the height of gate = 20~30cm). In the pilot test for the 25cm height of gate, it was shown that water level in the backside of gate was constant about 35cm when it overturned and it was fully overturned in a short time. Therefore it was expected that tainter gate developed in this study could be harmonious in the viewpoint of operation. 농업용저수지에 수위조절이 가능한 수문을 설치함으로서 이수용량을 추가하고 저수지의 상황에 따라 수위를 자유로이 변환시킬 수 있도록 하기 위하여 여수토에 설치를 전제로 전동 게이트 개발을 위한 모형실험을 실시하였다. 사전 구조해석에서는 적정 수문비는 1.00~1.45(게이트 높이는 20~30cm)로 판단되었으며, 수문 높이 25cm(수문비 1.18)인 모형실험 결과에서 유량별 전도시 수위는 35cm 내외로 일정하였고 전도는 짧은 시간 안에 전면전도가 발생하여 전도 게이트의 작동은 원활한 것으로 판단되었다. 그러나 수문전도 시 하류부로 유출되는 유량은 상부에서 유입되는 유속에 따라 증가되는 것으로 나타나 이에 대해서는 추후 계속 연구가 필요한 것으로 판단된다.
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이광야,김해도,정광근,이종남 한국농공학회 2005 한국농공학회 학술대회초록집 Vol.2005 No.-
Water Quality of effluent from wastewater treatment plants was reviewed to reuse effluent for agricultural water as alternative water resources. Among 2004, wastewater treatment plants, 19 plants are found to be used as wastewater resources applicable to irrigation. The total effluent capacities are 9,293 thousand < TEX >$m^3$< /TEX >per day, which may be used to irrigate paddy fields. In order to know how much the effluent can be use for agricultural water, we classified the effluent according to the river basin area and evaluated the water quality of the effluent.
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