• Journal of Korea Water Resources Association
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• v.41 no.6
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• pp.643-651
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• 2008

This study was conducted to promote reliability of the simulated result for the long-term streamflow in Daecheong watershed. This system was constructed by the SSARR model that considered the effect of small scale irrigation facilities. We investigated the present condition of small scale irrigation facilities and analyzed the relation between irrigation facilities and river discharge. According to the analysis result about the effect of irrigation facilities, the error occurrence frequency was increased at the sub-basin that has many reservoirs and during the second quarter except for the 2003 year. Therefore, we created the relative equation between small irrigation facilities and river water and estimated the simulated streamflow for the main stations. Consequently, error of the runoff simulated with considering small scale irrigation facilities was decreased than that without considering small scale irrigation facilities at all.

• Journal of the Korean Geographical Society
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• v.37 no.1
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• pp.15-40
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• 2002

This study is an attempt to grasp the spatial patterns and characteristics in the freight flows based on freight quantity data in 1997. The spatial background for the study is the Capital Region, which plays an important role in regional economics and industrial development. The methodology in the research used factor analysis to produce a functional region. The study selected three categories of freight that account for more than 60 percent of freight flows, chemical industrial goods, light industrial goods, and metal machinery industrial goods. The target analysis unit is divided into 36 zones. The common characteristic of the three categories is that they are concentrated at one specific region than are dispersed regionally. And in particular, the remarkable feature is that the central region of the study is Seoul. Usually the eminent regions of nows were made where environment of distribution facilities is good but these were made in a less than good environment. I think a reason is that facilities were uneven distribution.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.11
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• pp.239-253
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• 2020

This study is a descriptive research that provides basic data to develop customized emergency education programs for strengthening the emergency coping ability of facility and group home caregivers. Data were collected from 7.10~8.15 in 2020 in the S and G areas. A total of 236 questionnaires were included for the analysis. Data were analyzed using χ², t-test, ANOVA, and Pearson's correlation coefficients. Approximately 68.9% facilities and 50.7% group homes experienced emergencies, and there was a significant difference (χ²=8.42, p=0.004). First aid personnel were nurses (nurse aides) 55.3% facility and 42.7% of facility directors group home, showing differences (χ²=27.84, p<.001). 56.5% and 68.0% in the facility and group home, first aid care : ice pack, medication, Heimrich in the facility and 119 and guardian call, ice pack, Heimrich for the group home. First aid knowledge was determined to be significantly different between the facilities (11.60±2.09) and group homes (9.08±2.28) (t=8.39, p<0.001). Similarly, the emergency coping abilities showed a significant difference (t=8.00, p<0.001) between facilities (52.94±5.27) and group homes (47.33±4.39). In addition, a positive correlation was established between the experience of emergency situations and the emergency coping ability in the facilities. Overall, our data indicates that the emergency experience, emergency knowledge, and emergency coping abilities of the facility and group home caregivers are significantly different. We propose that emergency education tailored to the characteristics of each institution is needed.

• Journal of the Korea institute for structural maintenance and inspection
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• v.18 no.1
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• pp.68-74
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• 2014

Recently, concrete facility as advanced water treatment facilities is extending in the water treatment facilities according to raise awareness of pure drinking water and delicious water. For this reason, it is increased to the necessity need to make the standard and the development of waterproofing and anti-corrosion materials for concrete structures applied water treatment tank. So, related research has become active recently. However, as the limit of research focused on durability improvement of top coating material, it is insufficient to study on the adhesion strength between the concrete surface and primer. Therefore, there is to confirm the adhesion of between concrete surface and the three primers used as anti-corrosion waterproofing materials, and to investigate the properties of adhesion strength according to the condition such as dry condition, wet condition, and water pressure condition of the concrete surface in this study.

• Proceedings of the Korea Water Resources Association Conference
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• 2021.06a
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• pp.457-457
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• 2021

인공습지는 자연이 가진 정화기작을 인위적으로 증가시키기 위하여 조성한 자연기반해법에 해당한다. 인공습지는 습지 내 식물, 미생물, 토양 등의 상호기작에 의하여 오염물질이 제거된다. 인공습지의 오염물질저감효율은 시설의 규모와 유량, 유입물질의 부하량 수리학적 부하량, 체류시간 등의 영향을 받게 된다. 일반적으로 인공습지 적정 규모는 유역 및 기상인자의 특성과 조성목적에 고려하여 산정된다. 본 연구는 전국 35개 지역에 설치된 54개 인공습지를 선정하여 모니터링을 수행하였으며, 2011년부터 2018년에 설치된 시설이다. 54개 시설 중 도심지역에 13개, 농업지역 25개, 공업지역 3개, 상업지역 3개, 축산 10개가 설치되어있다. 습지형태는 Cell형 자유수면형 인공습지(Free Water Surface, Cell-FWS), 유로형(Flow) 자유수면형 인공습지(Cell-FWS), Cell과 Flow형이 결합된 Hybrid-FWS, 수직흐름형 인공습지(vertical flow constructed wetland)와 수평지하흐름형 인공습지(vertical flow constructed wetland)가 결합된 HYBIRD 형 습지로 구분된다. 연구결과, 일반적으로 SA/CA 비율이 클수록 오염물질의 저감효율은 증가하는 것으로 나타났다. 오염 물질별 인공습지 규모를 비교할 경우 저감효율 60%에서 인공습지의 규모는 유기물>영양염류>입자상물질 순으로 나타났다. 목표 제거효율 60%에서 SA/CA 비는 BOD에서 약 3.2%, COD에서 2.5%, SS에서 1.9%, TN 2.5%, TP 2.3%로 나타났다. 입자상물질인 SS는 유기물 및 영양염류에 비하여 유역면적 대비 시설면적이 가장 적게 나타났으며, 유기물질 제거에 큰 시설규모가 필요한 것으로 나타났다. 따라서 인공습지 설계시 유역 토지이용 및 강우특성을 고려하여 적정한 수질과 유량모니터링이 필요하며, 이를 토대로 목표 오염물질 선정이 중요한 것으로 나타났다. 또한, 농업지역의 최적화된 인공습지 위치는 임야가 20~30%, 밭이 20% 이하, 논이 10~50%를 포함하는 곳이 적정한 것으로 평가되었다. 도시지역 인공습지는 도시면적이 증가할수록 효율이 크게 변하지 않기에 가용위치가 적정한 위치로 평가된다. 인공습지의 효율은 유역의 세부 토지이용에 크게 의존하는 것으로 평가되었다. 따라서 인공습지 설계시 농업지역에서는 임야, 밭 및 논의 적정면적을 고려하여 인공습지 위치가 결정되어야 하는 것으로 나타났다.

• Korean Journal of Soil Science and Fertilizer
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• v.45 no.5
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• pp.698-703
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• 2012

This survey was conducted to obtain basic data of the quality of groundwater for agriculture in Gyeongnam province. Groundwater samples from paddy 15, upland 15, and plastic film house 30 sites were collected on April, July, and October in every two years from 2002 to 2008. According to the result of water quality analysis, groundwater quality was suitable for irrigation purpose averagely. The $NO_3$-N contents by land use were in the order of plastic film house > upland > paddy field and its contents were 6.53, 4.80, and $3.68mg\;L^{-1}$, respectively. In annual changes of water quality, pH was no significant change in paddy, upland, and plastic film house by 6.6~6.9. EC was increased in upland and plastic film house in 2008 and majors factors were $NO_3$-N and $Cl^-$. In upland and plastic film house, $NO_3$-N contents were 4.72 and $6.52mg\;L^{-1}$ in 2002, respectively, whereas they were 5.63 and $8.70mg\;L^{-1}$ in 2008, respectively. Of the investigated sites, $NO_3$-N was exceeded water quality standards for agriculture by 3.3~15.0% in plastic film house and $Cl^-$ was exceeded water quality standards for agriculture by 2.2% in upland of 2004. The $NO_3$-N contents were decreased with well depth and their contents were $5.38mg\;L^{-1}$ from 3~10 m, $4.87mg\;L^{-1}$ from 10~20 m, and $2.58mg\;L^{-1}$ from above 30 m. The $NO_3$-N contents by soil texture were highest in sandy loam by $5.73mg\;L^{-1}$ and lowest in clay loam by $4.13mg\;L^{-1}$. The $NO_3$-N contents by crops category were in order of fruit vegetables > leaf vegetables > rice > fruits > beans, contents of fruit vegetables and leaf vegetables were 5.81 and $5.30mg\;L^{-1}$, respectively.

• Proceedings of the Korea Water Resources Association Conference
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• 2021.06a
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• pp.175-175
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• 2021

농업용 저수지는 양질의 농업용수를 저장하여 알맞은 시기에 적절하게 급수하기 위한 필수적인 시설로 사용되고 있다. 근래에 농업용수의 용도가 점차 확장되면서 농산물의 품질에 필요한 관개용수의 수질뿐만 아니라 인근 하천과 생태계의 환경유지용량 대한 연구의 필요성이 제시되고 있다. 그러나 규모가 작거나 환경적 보전가치가 없어 조사 대상에서 제외되는 소규모 농업용 저수지는 측정 및 조사자료가 부족한 실정이다. 따라서 본 연구에서는 여름철 소규모 농업용 저수지의 모니터링을 통해 시공간적인 수질특성을 파악하고자 한다. 조사유역은 강원도 횡성군 횡성읍에 위치한 반곡저수지로 선정하였고, 2020년 7월에서 10월까지 8회에 걸쳐 상부와 하부지점에서 총 7개의 수질항목 간의 특성을 분석하였다. 공간적인 특성분포 파악을 위해 총 13지점에서 수질 관측 지점별로 7개의 수질항목에 대해 Spearman 상관분석을 실시하였다. 측정결과, 반곡저수지는 호소 생활환경기준과 OECD 부영양화 기준으로 과영양상태에 도달하였다. 집중적 강우로 인해 희석효과가 발생하여 수질항목 간의 경향성이 저하되어 정확한 분석은 어려웠지만 Chl-a와 T-P, DO와 pH 간의 유의함이 나타났으며, Chl-a와 T-P의 TSIKO 상호편차가 양의 값을 나타내며 다량의 인과 함께 조류가 성장할 수 있는 조건이 형성되고 있었다. 공간적 특성분포는 저수지의 상부지점에서 농도가 높은 경향이 나타났으며 강우 시 인근 농경지와 축산시설에 적치된 축산분뇨의 호 내 유입과 얕은 수심으로 바람에 의한 수직혼합이 영양물질을 용출시켜 부영양화를 악화시키는 것으로 판단된다. 반곡저수지 상부에 녹조제거제 투입 및 저감시설이 필요하며, 향후 지속적인 모니터링을 통해 소규모 농업용 저수지 수질 연구를 위한 기초자료로 활용할 수 있을 것으로 사료된다.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.29 no.3D
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• pp.335-345
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• 2009

Generally, density is used as a measure of effectiveness (MOE) of the level of service (LOS) for the basic segment of the roadway facility, but can not express the operational condition of the roadway facility properly because there can be an error in the computed density compared with the density measured in the field. Thus, the purpose of this study is to investigate the real-time traffic characteristic data (traffic flow, speed, occupancy, headway, spacing, etc.) from the detectors installed on the mainline section of urban freeway under the study, analyze the maximum flow rate from the relationship between the real-time traffic characteristics collected, and evaluate the LOS criteria within the basic segment of the urban freeway based on the relationship between the occupancy and the v/c ratio depending on the level of service.

• Journal of the Korean Institute of Educational Facilities
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• v.17 no.3
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• pp.33-40
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• 2010

This paper considered 1) the relation between the number of student and the floor area of the school building facility, 2) the situation and the distribution of the school building facilities area, 3) the position between the district office of education by the school building facilities composition. Data were collected from 529 elementary school in seoul. 1) The number of student is have not an influence on the floor area of the school building facility in the middle school. 2) The floor area of the school building facilities per 1 student of the jungbu district office of education is larger than other the district office of education and distribution of area is wide. 3) As the position between the district office of education by the school building facilities composition is considered by principal component analysis, the maintenance of the need space is late in the gangdong gangseo district office of education, maintenance of support space is late in the gangdong dongbu district office of education, the maintenance of management space is late in the seobu bukbu district office of education.

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2003.11a
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• pp.681-686
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• 2003

It has been designed GUI(graphic user interface) to consult the convenience of a input data and the flexibility that can be retrieved dismantling information relation to decommissioning DB of KRR1&2. The GUI can proceed an input materials and a search and output of a saved data in server based on a facility code and also have a function of explorer which can find the lower dismantling objects in each facilities. It has added the structure of the multimedia that could be showed a series of dismantling activities with a Mpeg and pictures into the GUI. In the future work, Decommissioning DB and User Interface are intend to contribute a functions that could be evaluate and analyze for a dismantling activities with a engineering theory.