• Journal of the Korean Society for Marine Environment & Energy
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• v.5 no.4
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• pp.19-26
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• 2002

This is a brief report on the development of a system which provides fishing vessels with a real-time key information that can direct to regions of high fish density. Water temperature and Plankton distribution are the base parameters and various public information have been examined and summarized. The suface water temperature can be obtained from NOAA's high resolution infrared data base and the vertical water temperature can be obtained from TAO/TRITON's buoy near the equator and ARGOS's drifting buoy covering wider Pacific ocean. MODIS's data is also utilized for sea color information. A model data format is proposed and a few examples are demonstrated.

• Journal of Wetlands Research
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• v.6 no.4
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• pp.59-69
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• 2004

Constructed wetlands are regarded as an important water treatment system for agricultural water quality improvement and management. The purpose of this study is to evaluate the application of subsurface flow wetland(SFW), using the Pharagmites australis as macrophytes, and to clarify the basic and essential factors to be considered in the construction and management of constructed wetlands. This study was carried out relatively short hydraulic residence time(HRT), 6hr ~ 72hr (3days), using eutrophic reservoir water with relatively low concentrations of influent and large quantity to be treated. The effluent satisfied the criteria of agricultural water quality. Removal efficiencies of Biochemical oxygen demand(BOD), Chemical oxygen demand(COD), Suspended solids(SS) and Chlorophyll a(Chl-a) were high in HRT 24hr, not any more significant increasement of removal efficiencies in HRT 48hr and 72hr. However, removal efficiencies of nitrogen and phosphorus increased as HRT increased, showing the highest efficiency at the 72hr of HRT in nitrogen, and 48hr in phosphorous. The SFW was very effective system for reservoir water quality improvement, and had the advantages of the reduction of purchasing cost to land required, lack of odors, and harmful insects, especially mosquito, the improvement of the scenic beauty and minimal risk of public exposure. Therefore, it was evaluated that the SFW was very available water treatment system for the water quality improvement of agricultural reservoir. However, it was need to consider with application of the SFW in high cost of construction and troublesome of management.

• Journal of the Korean Society of School Health
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• v.16 no.2
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• pp.13-23
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• 2003

To provide data necessary for effectively applying the HACCP system by understanding the current application condition of HACCP system and satisfaction level of the dietician in elementary schools, a mail-in survey was conducted on dieticians serving for 227 elementary schools applying HACCP system in Kyungsangbuk-Do since November 1, 2001 to December 20, 2001. 83.5% of the subjected schools were conducting more than 50% of HACCP cooking process management, and the level of cooking process management displayed significant relevance according to the number of dieticians serving the school meals. The area that was not well conducted in the field of HACCP system was proven to be water examination(94.0%), inspection on self-sanitation of cooks prior to cooking(90.6%), and maintenance of dry kitchen floor(l4.8%). The reason why the above areas are not well conducted was because of lack of time due to over workloads. Subjective dieticians had pointed out improvement of sanitary concept(58.1%) and improvement of self-sanitation (28.8%) as benefits of applying HACCP. 21.2% of the subjective dieticians were satisfied with application HACCP and 35.2% were dissatisfied with applying HACCP. In case of which the duration of applying the HACCP was longer than one year and in case of higher rate of HACCP cooking process management and longer work experience of the dieticians, the level of satisfaction was proven to be significantly higher. The most difficult things to follow in important management categories according to the features of dietitian work and work experience were food distribution of CCP7 step and maintenance of optimum temperature(70.7%). Subjective dieticians had pointed out insufficient facility or environment and lack of inspection equipments in order regarding problems of applying HACCP. Also in the level of necessity of improvement categories in applying HACCP, dieticians had replied that facility and equipment improvement was mostly needed. Due to the induction of HACCP system in school meals, comparatively well cooking process management is being conducted, and I believe it could contribute in securing safety and quality improvement of school meal by improving the sanitation concept of the dieticians. However, the satisfaction level of dieticians are rather low and there are many difficulties in maintaining optimum temperature in the process of food distribution and transportation process. Also, lack of facilities and environment, lack of inspection equipments and etc are pointed out as problems of inducing HACCP. Thus, to settle HACCP system, it is believed that brave investment must be preceded.

• Hwankyungkyoyuk
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• v.11 no.2
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• pp.252-261
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• 1998

Since 1980's during which environmental pollution became serious enough to urge various types of environmental educations in many areas. But, most emphasis has been put on theoretical education. Even field education training mostly focused on water pollution. Therefore, simple air pollution monitoring system was needed for better field education in air pollution. In this study, we evaluated Passive Sampler as an useful tool for teaching air pollution in field. Students have found passive sampler very effective tool. Recent comparative study of auto-monitoring and passive sampler networks suggested a potential use of passive sampler as an useful tool for environmental education. In this study, the correlation between two sets of values appears very high judging from the regression slope of 0.92 and correlation coefficient of 0.91 However, inexpensive Passive sampler with easy-to-operate colorimeter, has not been used in environmental education partially because large scale fluctuation in time and space characteristic to air pollution has been overlooked so that the sampler has not been tested for an effective educational tool. Passive sampler certainly deserves further in depth research as an effective air monitoring system, and better attention to its usefulness to teach students and public.

• Journal of Forest and Environmental Science
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• v.25 no.3
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• pp.147-155
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• 2009

Higher plants provide valuable genetic assay systems for screening and monitoring environmental pollutants. They are now recognized as excellent indicators of mutagenic effects of environmental chemicals and are applicable for the detection of environmental mutagens both indoor and outdoor. 2,4-dichlorophenoxyacetic acid (2,4-D) is a herbicide commonly used in agriculture. The residues of 2,4-D are present in air, water, soil and edible plants. It constitutes a real hazard to the public health because it's wide spread use in agriculture. Genotoxic effects of 2,4-D on plant cells and potential of higher plants as a biomonitoring system for detecting chemical mutagens are evaluated. It is recommended that higher plant systems have been accepted by regulatory authorities as an alternative biomonitoring system for the detection of possible genetic damage resulting from pollution and the use of environmental chemicals.

• Journal of the Korean Society for Marine Environment & Energy
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• v.14 no.4
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• pp.239-248
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• 2011

This paper evaluated types and characteristics of development projects occurred in coastal area (Public Water) by analyzing an application status of Sea Area Utilization Conference System that effective protect and manage marine environment and ecosystem from various artificial utilization and development enforced in 2008. Also, system improvement for stable settlement and security of efficiency considering exposed problems during system enforcement were diagnosed. The number of Sea Area Utilization Conference (SAUC) performanced during the period of 2009-2010 was 3,705, which consisted of simple SAUC (87.0%), general SAUC (12.8%), and Sea Area Utilization Impact Assessment (SAUIC; 0.2%). The general SAUC was accomplished for Public Water reclamation (43.4%), seawater supply and drainage (17.5%), dredging sediment (5.5%), installation of port facilities (4.6%) and fishing harbor facilities (2.3%), and others (23.4%). Statements of Environmental Impact Assessment (EIA) were reviewed mainly for construction of port facilities (32.9%), followed by construction of industrial complex, development of tourism and leisure complex, road construction, and development of energy facilities. It would be necessary to strengthen effectiveness of the system, advertisement, and capability of conference and review agency, and to enhance confidence of marine EIA continuously, according to the increase of development projects, and diversity and enlargement of development types.

• Magazine of the Korean Society of Agricultural Engineers
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• v.42 no.4
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• pp.96-105
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• 2000

Field experiment was performed from August 1996 to December 1999 to examine the performance of constructed wetland system for wastewater treatment in rural area. The constructed wetland system was installed in Konkuk University and the effluent from septic tank of school building was used as an influent to the treatment basin. The treatment basin was composed of sand bed with planted reed. From August 1996 to June 1998 the hydraulic loading rate was fixed with about 15.63cm/day and theoretical detention time was 1.38 days, and from July 1998 to December 1999 the hydraulic loading rate was about 6.25cm/day and theoretical detention time was 3.5days. It worked continuously even during winter time, and the sewage flowed without freezing even when average daily air temperature was below -1$0^{\circ}C$. Average removal rate of BOD , COD, and SS was about 70%, T-P removal rate was about 50.8% , and T-N removal rate was 23.9%. The reason for poor T-N removal might be due to high influent concentration and short retention times. At the later years BOD and COD removal rates were increased , and SS and T-P removal rates did not change significantly , but T-N removal rates were decreased. The effluent of the wetland system often effluent water quality standards for sewage treatment plant, therefore, further treatment would be required if the effluent need to be discharged to the public water. Wetland system involves relatively large land area and could be suitable for rural area. Therefore, utilization of reclaimed sewage for agricultural purpose or subsequent land treatment is recommended as a ultimate disposal of sewage for agricultural purpose or subsequent land treatment is recommended as a ultimate disposal of sewage in rural area.

• Proceedings of the Korea Water Resources Association Conference
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• 2023.05a
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• pp.427-427
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• 2023

일반적으로 수자원가용량이라 하면 지표·지하·토양 등에 있는 모든 수자원의 양이라 할 수 있다. 정확한 수자원가용량의 평가를 위해서는 강수, 기온 등의 기상 예측의 정확도 확보가 우선되어야 하며, 지표 하에 보이지 않는 수자원의 양을 정확히 평가할 수 있어야 한다. 한국건설기술연구원은 2012년부터 세계기상기구(WMO, World Meteorological Organization)에서 수자원평가 부문 리더 역할을 수행하면서 회원국들에게 수자원가용량평가를 위한 '동적수자원평가시스템'의 개발을 제안하여 추진하였다. 그 결과, 동적수자원평가시스템(Dynamic Water resources Assessment Tool, DWAT)이 2017년 12월에 개발되었고, 2019년 5월에는 WMO 웹사이트 (https://public.wmo.int/en/water/dynamic-water-resources-assessment-tool)를 통해 193개 회원국에 보급되기 시작하였다. DWAT은 전 세계가 무료로 이용할 수 있는 수자원평가 도구로, 지하수, 용수이용 뿐만 아니라 지표수를 고려한 수자원계획 및 관리를 위해 중⋅소규모 하천 유역에 적용될 수 있다. 특히, 논 지역의 유출특성을 모의할 수 있는 모듈을 탑재하였으며, 고위도 및 고산지대의 수문학적 특성을 반영할 수 있는 융설 모듈이 포함되었고, 매개변수 최적화 기능도 포함되었다. WMO는 수자원분야 주요사업 중 하나인 "전지구 수문현황 및 전망 시스템(HYDROSOS, global HYDROlogical Status and Outlook System)" 사업을 추진하고 있다. 본 사업은 전지구 기상예보를 활용하여 주요 지점의 자연 유출량에 대한 현황과 예보를 수행하는 것을 목표로 한다. 2019년 6월 제18차 WMO 총회에서는 수자원분야 주요 사업인 HYDROSOS의 시범사업을 DWAT이 지원하는 것으로 의결되었다. 따라서 이러한 DWAT의 활용을 통해 대한민국의 수자원 평가 실무와 관련된 기술이 WMO 회원국에 지속적으로 보급될 것으로 판단된다.

• Journal of Fisheries and Marine Sciences Education
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• v.22 no.3
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• pp.303-315
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• 2010

The fisheries resource in waters under the jurisdiction of Korea is being endangered by unlawful fishery. The Korean government exerted great efforts to establish the public order of water, but the number of the exposed unlawful fishing violations has increased for last 10 years. The system to guide fisheries regulatory noncompliance of Korea is limited to the use of fishing guidance patrol boats. For strength of monitoring and surveillance systems, the government needs to phase in Vessel Monitoring System. But there are some studies for that. The defects of present monitoring practice can be drawn from the facts described above. The qualification of the fishery control official one of most important element of fishing control system, is defined as any officer who is charging on fishing. For clear law enforcement the qualification should require considerable experience and knowledge. Korean coast guards have problems on guiding unlawful fishing violations because of the absence of administrative authority by comparison with the fisheries guiding officer, who has both authorities on administration and jurisdiction. To draw some judicial problems this research presents a analysis on the fishing control system. The research suggests the improvements to compensate the defects.

• 유체기계공업학회:학술대회논문집
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• 2006.08a
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• pp.49-52
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• 2006

should be in English, A make out an economical, reliable and easy to adoptable instrument in turbine discharge measurement was restricted from lots of it's foundational condition. Not with standing the brilliant progress in new technology of these day, useful instrument for flow measurement in turbine is still ongoing. Nowaday, the increasing importance of renewable energy makes it more important that the measuring turbine efficiency as a decision making index of old turbines' replacement. In Turbine performance diagnosis, Kwater(Korea Water Corporation) got an enough ability and decent reputation for who has invested lots of time and effort for buildup and development. In Korea as a public corporation who should take a crucial roll in Turbine business, Kwater has introduced some developed new technology for other domestic concerned one. With this writing, I'd like to introduce ASFM system as a newly developed instrument that can cope with lots restriction in discharge measurement in turbine. Kwater adopted the system in 2005, and performed 2 times of trial test. The test result was good enough to use the system as a reference test method.