• 한국환경보건학회지
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• 제43권5호
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• pp.422-430
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• 2017

he objective of this study is to evaluate and analyze Sincheon basin water environment system. The data were collected from 2010 August to 2016 December including BOD, SS, T-N, T-P. The results were as followed. As the result of comparing the amount of BOD generated by pollution sources in the Sincheon water system, industrial was the highest at 33,259.4 kg/day. In comparison with the tributary, it was estimated that Dong-Du water system reveals the highest level of BOD in the industry. Population and livestock was high in CheongDam and Sang-Pae water system. With the inflow stream of Hyo-Chon, Suk-Woo and Sang-Pae, the pollution degree of BOD and T-N level of Sincheon increased and pollution degree of tributary was higher than that of Sincheon's main stream. The main reason of pollutant of Suk-Woo was from untreated wastewater, and it influenced downstream of Suk-Woo. Hyo-Chon stream satisfy the water quality standard, but Zn was designated as a Monitoring contaminants, was high as 14.670 mg/L (standard 0.02~2.45mg/L)because of textile wastewater. And Sang-Pae stream was polluted by livestock wastewater of livestock farms as a nonpoint source.

• 한국환경농학회지
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• 제41권1호
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• pp.32-40
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• 2022

BACKGROUND: Climate-smart agriculture (CSA) has been proposed for sustainable agriculture and food security in an agricultural ecosystem disturbed by climate change. However, scientific approaches to local agricultural ecosystems to realize CSA are rare. This study attempted to evaluate the weather condition, rice production, and greenhouse gas emissions from the rice cultivation in Hwaseong-si, Gyeonggi-do to fulfill CSA of the rice cultivation. METHODS AND RESULTS: Over the past 3 years (2017~2019), Chucheong rice cultivar yield and methane emissions were analyzed from the rice field plot (37°13'15"N, 127° 02'22"E) in the Gyeonggi-do Agricultural Research and Extension Services located in Gisan-dong, Hwaseong-si, Gyeonggi-do. Methane samples were collected from three automated closed chambers installed in the plot. The weather data measured through automatic weather station located in near the plot were analyzed. CONCLUSION(S): The rice productivity was found to vary with weather environment in the agricultural ecosystem. And methane emissions are high in a favorable weather condition for rice growth. Therefore, it is necessary to minimize the trade-off between the greenhouse gas emission target for climate change mitigation and productivity improvement for CSA in a local rice cultivation.

• 한국식물병리학회:학술대회논문집
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• 한국식물병리학회 2003년도 정기총회 및 추계학술발표회
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• pp.108.2-109
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• 2003

The Gyeonggi-do Agricultural Research and Extension Services has developed a web-site (www.epilove.com) in collaboration with EPINET to provide information on agricultural weather and rice disease and insect pest management in Gyeonggi-do. Weather information includes near real-time weather data monitored by automated weather stations (AWS) installed at rice paddy fields of 11 Agricultural Technology Centers (ATC) in Gyeonggi-do, and weekly weather forecast by Korea Meteorological Administration (KMA). Map images of hourly air temperature and rainfall are also generated at 309m x 309m resolution using hourly data obtained from AWS installed at 191 locations by KMA. Based on near real-time weather data from 11 ATC, hourly infection risks of rice blast, sheath blight, and bacterial grain rot for individual districts are estimated by disease forecasting models, BLAST, SHBLIGHT, and GRAINROT. Users can diagnose various diseases and insects of rice and find their information in detail by browsing thumbnail images of them. A database on agrochemicals is linked to the system for disease and insect diagnosis to help users search for appropriate agrochemicals to control diseases and insect pests.

• 한국환경보건학회지
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• 제50권1호
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• pp.66-72
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• 2024

Background: Vibrio vulnificus is a serious opportunistic human pathogen that has a worldwide distribution in a variety of marine and estuarine environments. Objectives: For this reason, we investigated the distribution of Vibrio vulnificus in coastal areas of Gyeonggido Province from 2018 to 2022. Also, we analyzed the correlation between V. vulnificus leading to infection and two marine environmental factors (water temperature and salinity). Methods: We collected a total of 266 samples from six coastal area points (i.e., seawater, mudflats). Specimens were isolated using selective plating media and isolated strains were identified by a VITEK 2 system. To find the relevance of the isolation rates of V. vulnificus and number of cases of V. vulnificus infection, we summarized the data on 48 cases of V. vulnificus infection from the open data of the Korea Disease Control and Prevention Agency. Results: Among the 266 samples taken during the investigation period, 47 strains were isolated, and the separation rates of V. vulnificus were 17.7%. The monthly isolation rates of V. vulnificus were ranked in the order of August (53.8%), September (33.3%), June (28.6%), and July (21.1%). There was a positive correlation with the temperature of seawater, but salinity was not significant. The number of cases of V. vulnificus infection reported in Gyeonggi-do Province were 18 (37.5%) in September, 14 (29.2%) in August, and eight (16.7%) in October. The proportion was 83.3%. It was relevant to the isolation rates of V. vulnificus in the marine environmental sources. Conclusions: Our data showed that the number of V. vulnificus infection cases could be affected by changes in the distribution of V. vulnificus due to rise the temperature of seawater in the marine environment.

• 한국환경보건학회지
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• 제44권3호
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• pp.250-258
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• 2018

Objectives: The study examined indoor air quality during daytime and commute times in underground parking lots in five apartments located in northern Gyeonggi province. Methods: This study examined the temporal characteristics of $PM_{10}$, $CO_2$, CO, HCHO and VOCs in the indoor air quality of the underground parking lots in five apartments. Results: $PM_{10}$ concentration in daytime were ranged from 37.4 to $69.9{\mu}g/m^3$ which complied with the indoor air quality maintenance standard ($200{\mu}g/m^3$) and Gyeonggi province ordinance standard ($180{\mu}g/m^3$). However $PM_{10}$ concentrations in commuting time were in range of $447.3{\sim}944.0{\mu}g/m^3$ that exceeded for both criteria. The $CO_2$, CO and HCHO concentrations complied with the standard. The VOCs indicated high tendency in the order of toluene, xylene, ethylbenzene and benzene. This tendency was more apparent in commuting time than daytime. Conclusion: All indoor parking lots of five apartments were equipped with ventilators. However the most apartment residents did not operate blowers to save electricity and the lack of interest for indoor air quality. In order to improve the indoor air quality of underground parking lots in apartment, operating ventilation system during commuting time is recommended.

• 환경위생공학
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• 제20권2호
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• pp.39-46
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• 2005

This study was Performed to survey and evaluate the contents of Plasticizers such as DEP(diethyl phthalate), DPrP(di-n-Phthalate), DBP(di-n-butyl Phthalate), DPP(di-n-pentyl Phthalate), DCHP(dicyclohexyl phthalate), BBP (butylbenzyl phthalate), DEHP(di-(2-ethylhexyl) phthalate) and DEHA(di-(2-ethylheryl) adipate), which are suspected as endocrine disruptors, in food and drug PVC packaging. Tested samples were 5 food wraps, 35 food containers, 40 food and drug packages(type of tablet and capsule) in Gyeonggi-Do area. The contents of DEHA in wrap were 188.9g/kg, 203.1g/kg, 238.4g/kg, 290.9g/kg and 308.3g/kg, respectively, while the other plasticizers were not detected. DEHP was used in 4 samples of food containers and DEHP contents were 4.7g/kg, 30.7g/kg, 35.8g/kg and 53.4g/kg, respectively. In food and drug packaging materials(type of tablet and capsule), the plasticizers were not detected.

• 한국식품위생안전성학회지
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• 제20권4호
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• pp.199-204
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• 2005

DEHP는 PVC의 유연성 등을 향상시키기 위해 첨가되는 가소제로서 우리나라에서는 식품용 PVC제조시 사용을 금지하고 있으나 주변 환경으로부터 쉽게 오염될 수 있고 동일한 설비로 여러 용도의 PVC를 생산할 경우 혼입될 우려가 있어 안전성 확보가 요구되고 있다. 이에 본 연구에서는 유통 제품에 대한 모니터링을 위하여 2000년부터 2004년까지(2003년 제외)경기도내에서 유통되고 있는 PVC 식품포장제를 대상으로 재질에 함유된 DEHP함량을 분석하였다. 2000년에는 총 47건 중 30건($63.8\%$)에서 $5.5\∼80.6\;g/kg$의 DEHP가 검출되어 유통 제품 대부분이 DEHP를 사용하고 있었으며 검출된 제품은 대부분 한과류 용기로 나타났다. 2001년의 경우 DEHP검출 제품은 143건 중 56건($39.2\%$)으로 $1.3\∼82.8$ G/kg의 함량범위를 보였고 2000년과 마찬가지로 대부분 한과류 용기에서 DEHP가 검출 되었다. 2002년에는 88건 중 8건($9.1\%$)에서 $1.3\∼51.5$ G/kg의 범위로 DEHP가 검출되었고, 2004년에는 89건 중 1건 ($1.1\%$)에서 30.5 g/kg의 DEHP가 검출되었다. DEHP 검출을은 2000년 $63.8\%$, 2001년 $39.2\%$, 2002년 $9.1\%$, 2004년 $1.1\%$로 매년 급격하게 감소하였다. 이는 유통 PVC식품포장재에 대한 지속적인 수거$\cdot$검사와 제조업체에 대한 관리로 DEHP사용이 크게 개선되었기 때문인 것으로 사료된다.

• 한국환경보건학회지
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• 제45권5호
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• pp.426-433
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• 2019

Objectives: Zooplankton communities play important roles in aquatic ecosystems as secondary producers that graze on phytoplankton and in turn are preyed upon by planktivorous and juvenile fish. They can shift their distribution, species composition, and abundance in response to environmental changes. Therefore zooplankton communities are important for understanding the energy flow in aquatic ecosystems and can be valuable indicators of environmental conditions. However, zooplankton in streams are still not well-studied, especially in northern Gyeonggi-do Province. This study aims to investigate the zooplankton communities in major streams in northern Gyeonggi-do Province. Methods: Zooplankton is important in the nutrient cycle and energy flow of aquatic ecosystems. Therefore, we surveyed zooplankton and measured temperature, DO, BOD, COD, T-N, T-P, and Chl-a in major streams (Sincheon, Gongneungcheon, Wangsukcheon, and Gapyeongcheon Streams) and stagnant water (Gomoji Reservoir). Results: The water quality in Gapyeongcheon Stream was the highest grade, while that of Gomoji Reservoir was mesoeutrophic and eutrophic during the research period. In the zooplankton community, Nauplius, Rotaria, and Monostyla spp. were dominant in Sincheon, Gongneungcheon, and Wangsukcheon Streams, and the dominance index was also high. In the case of Gapyeongcheon Stream, it was found that water quality and aquatic ecosystem health were good, and the lowest dominance index reflected this. In Gomoji Reservoir, Polyarthra spp., Nauplius, and Bosmina longirostris, which can be easily observed as eutrophication progresses, showed a high dominance rate. Therefore, it is necessary to monitor the progress of eutrophication in further research. Conclusions: We collected data on the zooplankton communities in streams and investigated their characteristics. As a result, specific species were found to be dominant at each survey sites and some of them are known to be observed as eutrophication progresses. Therefore, we should investigate the zooplankton community of streams around us and apply ecological stream management.

• 미생물학회지
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• 제53권3호
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• pp.156-162
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• 2017

레지오넬라증은 인공수계환경이 레지오넬라균에 오염되었을 때 에어로졸의 전파에 의하여 집단 발생되는 심각한 폐렴과 높은 치명률을 일으키는 호흡기질환이다. 본 연구에서는 경기도내 수계시설로부터 147주의 레지오넬라균을 검출하였고, 시설별, 수계환경별 분포현황을 조사하였다. 분리한 레지오넬라균 중에서 Legionella pneumophila의 검출률은 85.7%로 높게 나타났으며, 혈청군을 분석한 결과 L. pneumophila serogroup (sg) 1이 주로 검출되었다. Non-L. pneumophila 중에서는 L. wadsworthii이 가장 많이 검출되었다. L. pneumophila sg 1의 유전학적 다양성을 분석하기 위해 pulsed field gel electrophoresis (PFGE)와 sequence-based typing (SBT) 방법을 사용하여 비교 분석하였다. 32주에 대해 PFGE 분석 결과 22개의 PFGE pattern을 보였고, SBT 분석 결과 9개의 유형으로 나누어졌다. PFGE와 SBT 분석에서 모두 크게 3개 group으로 분류되어 매우 유사한 결과를 나타냈다. SBT 유형 중 ST1이 가장 우점하였고, 2개의 새로운 유형도 찾아낼 수 있었다. SBT는 데이터베이스가 잘 구축되어 있어 균주 간의 유전학적 유형분석을 쉽고, 간단하게 할 수 있기 때문에 레지오넬라증의 분자역학적 연구에 유용한 방법임을 확인할 수 있었다.

• 한국환경보건학회지
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• 제43권3호
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• pp.233-239
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• 2017

Objectives: The pollution status of heavy metals within the soil was investigated with an aim to establishing a sustainable soil environment within parks and amusement facilities installed in urban areas of Gyeonggi-do Province. Methods: As sampling sites, 14 locations were selected from a city with a number of factories near a residential area, a residential area, and a children's park in a city with mixed green areas. Seven kinds of heavy metals, including Cd, Pb, and Hg, and the pH of soil were analyzed three times by inductively coupled plasma optical emission spectroscopy (ICP-OES) and atomic absorption spectrometer (AAS). Results: In this study, the pH of the samples from the residential park and industrial park showed 5.7-6.5 and 5.9-7.0, respectively. The overall mean concentration (mg/kg) of heavy metals was Zn (132.8), Ni (73.0), Cu (47.4), Pb (35.9), As (4.84), Cd (0.39), and Hg (0.07), indicating that these concentrations of heavy metals were lower than those for the area 1 standard of soil pollution concern criteria. In addition, the sampling sites in the residential area and the industrial area also showed the same tendency for concentration distribution. Conclusions: We found that the soil pollution class (SPC) of some spots were over 200, which are third and fourth classes. In order to manage a sustainable soil environment in a city park, it is suggested that local governments, the management bodies for these parks, need to manage, supervise, and investigate soil pollution and quickly replace contaminated soil.