• Title, Summary, Keyword: pollution

Search Result 11,663, Processing Time 0.074 seconds

A mesh generation based on the pollution error (Pollution 오차를 이용한 요소생성에 관한 연구)

  • 유형선;편수범
    • Journal of the Korean Society for Railway
    • /
    • v.2 no.3
    • /
    • pp.46-53
    • /
    • 1999
  • In this paper, made was a study on a mesh generation method based on the pollution error. This method is designed for the control of the pollution error in any patch of elements of interest. It is a well-known fact that the pollution error estimates are much more than the local one. When the pollution error is significant, nothing can be said about the reliability of any estimator based on local computations in the patch. Reliable a posteriori error estimation is possible by controlling the pollution error in the patch through proper design of the mesh outside the patch. This design is possible by equally distributing the pollution error indicators over the mesh outside the patch. The mesh generated from the conventional feedback pollution-adaptive mesh generation algorithm needs many iterations. Therefore, the solution time is significant. But the remeshing scheme in the proposed method was used here. It was shown that the pollution-adaptive mesh improves the E.I., simply denoted as Effectivity Index, on the patch of interest, and the pollution error reduces less than the local error.

  • PDF

A Study on the Change of Education System for Marine Pollution Prevention Manager in Korea - A Comparative Analysis between Old "Marine Pollution Prevention Act" and New "Marine Environment Management Act" - (해양오염방지관리인 교육 제도의 개정에 관한 고찰 - 해양오염방지법과 해양환경관리법의 비교분석을 중심으로 -)

  • Kim, Kwang-Soo
    • Journal of the Korean Society of Marine Environment & Safety
    • /
    • v.15 no.2
    • /
    • pp.105-110
    • /
    • 2009
  • Marine pollution prevention manager system has been operated for the purpose of preventing marine pollution from ships and marine facilities in Korea. As a new "marine environment management act" replacing an old "marine pollution prevention low" had entered into force from January 20, 2008, the education system for marine pollution prevention manager is to change in some ways. Major changes in education/training institutions, education/training courses, trainees, marine pollution prevention manager's works and business, marine facilities and educational subjects are summarized, comparing between old "marine pollution prevention act" and new "marine environment management act".

  • PDF

A Study on the Construction of Pollution Management System with Influx the Urban Stream (도심하천 유입 오염원 관리시스템 구축에 관한 연구)

  • Min, Kwan Sik
    • Spatial Information Research
    • /
    • v.22 no.2
    • /
    • pp.45-52
    • /
    • 2014
  • In recent years, The importance of the river pollution management has increased and central and local governments are making constant effort to work out river pollution problems. Accordingly, this paper is to take a closer look at applications of spatial data and river pollution information(aerial photograph, parcel information, pollution source, GPS data et al.). More exactly, the purpose of the present paper is to offer an applications of spatial information for development of the river pollution management system. In order to provide a framework for more detailed consideration of the quantitative analysis of river pollution source and management plan by apply GPS and GIS. For that reason, this paper was to build pollution management system of river by spatial analysis. It is to be hoped that this paper will contribute to establish the management policy for urban stream pollution source preservation.

Assessment of Heavy Metal (loid) Pollution Using Pollution Index in Agricultural Field Adjacent to Industrial Area

  • Min, Kyungjun;Hong, Youngkyu;Choi, Wonsuk;Kim, Daebok;Kim, Sungchul
    • Korean Journal of Soil Science and Fertilizer
    • /
    • v.49 no.6
    • /
    • pp.768-775
    • /
    • 2016
  • Heavy metal pollution in arable field is an critical problem due to crop safety. For this reason, national survey of heavy metal pollution in the arable field near at the industrial area has been conducted from 1999 in Korea. The main purpose of this research was to monitor heavy metal pollution in Chungnam/chungbuk province and to evaluate pollution index (PI) in soil. Total of 15 sampling locations were examined and average concentration of each heavy metals were following: As - $2.99{\pm}2.63$, Cd - $0.23{\pm}0.07$, Cu - $9.35{\pm}6.48$, Ni - $9.26{\pm}8.03$, Pb - $10.18{\pm}3.32$, Zn - $52.9{\pm}17.18$. No sampling site was exceeded threshold level of each heavy metals. Calculated PI in soil was ranged between 0.03 - 0.27 indicating that also no heavy metal pollution is occurred in examined sampling locations. Although, no heavy metal pollution was observed in the examined sites but monitoring of heavy metal pollution should be continued for possible accidental pollution in arable field near at the industrial area.

A Study on the Mechanism of Environmental Pollution in Caves (개방동굴의 환경오염 메카니즘에 관한 연구 - 고수동굴을 사례로 -)

  • Hong, Hyun-Cheol
    • Journal of the Speleological Society of Korea
    • /
    • no.89
    • /
    • pp.37-45
    • /
    • 2008
  • If a cave is developed and opened to the public, the pollution in caves is inevitable. This kind of environmental pollution is caused by an environmental pollution system that is formed by the interaction among various pollution factors, not by a single factor. The main causes of the pollution are the development of passage, installation of lamps, tourists, oxidation of fixtures, temperature rise and littering, which in turn causes environmental pollution such as green and black mold growth, vatting, exfoliation and water pollution.

A Study on Improved Allocations of Permissible Water Pollution Load at the Implementing Stage of Tatal Water Pollution Load Management Plan (수질오염총량관리계획의 시행단계에서 오염부하량 할당방안 개선에 관한 연구)

  • Kim Sie-Heon;Rim Jay-Myung
    • Journal of environmental and Sanitary engineering
    • /
    • v.20 no.3
    • /
    • pp.51-56
    • /
    • 2005
  • Allocation of water pollution load from loading capacity can be much essential, controversial, and its standards can be applied case-by-case to the various situations. Allocation methods to point sources are generally 'Equal effluent concentration', 'Equal percent Treatment', Loading capacity at planning stage consists of basic pollution load, development pollution load, reserved pollution load and margin of safety. But at the implementing stage loading capacity can be consisted of allocatable load and margin of safety to give more flexibility in the total water pollution load management plan. In that case, we can re-adjust and altogether use the pollution load of point sources of series and non-point sources at the implementing stage.

Evaluation Method of Urban Development Location by APEI (Air Pollution Exposure Index) (대기오염 노출지표에 의한 도시개발 입지의 평가에 관한 연구)

  • Kim, Ki-Bum;Kwon, Woo-Taeg;Kim, Hyung-Chul
    • Journal of Environmental Impact Assessment
    • /
    • v.16 no.4
    • /
    • pp.267-275
    • /
    • 2007
  • In this study, relationship between the air pollution of Siheung city and the relative contribution of automobiles to the city's pollution was evaluated for the first time. Then, new air pollution exposure index was developed through simulation. Using the newly developed index, two different urban development scenarios were compared to present a sustainable urban development plan to reduce air pollution from the land utilization point of view. According to the result of this simulation, air quality of the city was found to be affected significantly by human activities. More populated area showed worse level of air quality. Any development in the city resulted in more automobile activity and deterioration of air quality. This simulation result thus explains that a rapid increase of automobiles accompanied by the land development near local roadsides in the city is the major cause of air pollution in Siheung city. In this study, if urban activities are vigorous in an area with high air pollution, people are more likely to be exposed to air pollutant under the bad environmental conditions. On the other hand, if urban activities are less vigorous in an area with high pollution or if urban activities are vigorous in an area with less pollution, the environmental condition was positive. The APEI (Air Pollution Exposure Index) was developed based on these considerations. Scenarios 1 and 2 were compared and analyzed using APEI. In result, scenario 1 is the case in which land is developed and used in an environmentally favorable manner. From this study, it was proved that the impact of air pollution on human health can be minimized with proper land use. The result form the current study can be used as the basic information to solve problems from improper land utilization and air pollution (by road traffic). It also can be utilized to evaluate air pollution level according to land use and road characteristics and to help to choose the best location of land use to comply with the road function and status.

A Study of GIS-based Estimation of Pollutant Loads in Accordance with Spatial Landuse Variation - Focussing on Wangsook Watershed - (토지이용의 공간적 다양성에 따른 GIS 기반 오염부하 산정에 관한 연구 - 왕숙천 유역을 중심으로 -)

  • Kim, Kyoung-Soon;Kim, Kye-Hyun;Kwon, Oh-Jun
    • Journal of Environmental Impact Assessment
    • /
    • v.14 no.5
    • /
    • pp.305-315
    • /
    • 2005
  • The scheme to classify pollution sources in Korean TMDL planning has been pointed out too much complex to implement practically because of requiring a wide range of items to be collected from a field. Within a deficient situation to collect field data, the mathematical scheme that focuses only on counting an uniform area ratio of the different land uses to estimate of pollutant loads from individual sub-catchments has been used without taking into account of the spatial characteristics of major land uses as well as the locations of pollution sources in each sub-catchment. It would cause to significant level of errors to estimate the pollution loads. Therefore, this study proposes a renovated scheme that can be adopted more easily to classify pollution sources in the watershed and reduce the estimation errors in the spatial distribution of pollution sources by introducing a spatial analysis based on digital land cover maps. In order to estimate a unit area to calculate the uniform pollution load, the pollution response unit area that is locating spatially at the same place and having same land use is identified through the application of GIS overlay technique. Unlikely existing conventional method to calculate the pollution load based on equal distribution of pollutants for each administrative boundary, it is assumed that the pollution load from household and livestock sources are generated and washed off from only residential areas. While, pollution from business population comes from commercial area and industrial load from wastewater discharge facilities are from industrial areas. From comparison of the calculated results from the existing the method and the proposed one, it is found that although the estimation of pollution load from sub-catchment in the case of the existing conventional method application results in negligible difference in total pollution amounts from the whole area of Wangsook watershed as a study area, significant difference of pollution load among sub-catchment in which pollution response unit areas are diverse, however, appears in the case of the application of the renovated scheme.

Measure of Environmental Performance through Integrated Pollution Intensities (통합오염원단위 지수를 이용한 환경성과 측정)

  • Kang, Sang-Mok;Chung, Young-Keun;Cho, Joo-Hyun
    • Environmental and Resource Economics Review
    • /
    • v.14 no.1
    • /
    • pp.135-166
    • /
    • 2005
  • This paper measures integrated pollution intensities and changes in pollution intensity, and figure out environmental performance. We introduce a new definition of pollution intensity and its method measuring integrated pollution intensities. We distinguish 24 manufacturing industries into light industry and heavy industry, and divide heavy industry into pollution industry and the other residual heavy industry to measure the integrated pollution intensities and their changes. While the pollution industry within heavy industry, based on the integrated pollution intensity, was the most pollution-intensive, the other residual heavy industry within the heavy industry was the most successive in reducing pollutants. The annualized average index of the integrated pollution intensities grew as much as 9.1 percent, of which the annualized change in the index of pollution emission increased 13.3 percent, but the improvement of 3.9 percent in the change of output quantity offset the increase in the index of pollution emission. The changes in the integrated pollution intensity for the light and heavy industries were 1.125 and 1.042, respectively. The reason the heavy industry showed the lower change in the index of pollution intensity, while the change in the pollution industry was very high, was because the average change in the other heavy industry decreased around 9 percent.

  • PDF

A Study on The Change of University Student's Consciousness and Behavior for Environmental Problems Before and After Environmental Education(II) (환경교육 전.후 학생들의 환경문제에 대한 태도와 인식변화에 관한 연구(II))

  • Park, Ki-Hark;Lee, Duck-Nan
    • Journal of environmental and Sanitary engineering
    • /
    • v.22 no.4
    • /
    • pp.105-117
    • /
    • 2007
  • The research was conducted based on the 1012 cases questionnaire for the purpose of to evaluate the change effect of university student's consciousness and behavior before and after lecture on environmental problems. And this questionnaires were performed with self-administered by the university student who made a application for liberal arts related to environmental subjects. The results were as follows. According to the analysis results the most students responded that the most serious problem of environmental pollution before the lecture on environmental education was a genetic modified organism(3.64/4.00), but the most serious problem of environmental pollution was changed to the topic of water pollution(3.96/4.00) after the lecture on environmental problem. And also according to the analysis results dributed by gender were that boy students show a higher concerning(170%) than that of girl students(150%). The most good results obtained after lecture on environmental problem were water pollution(23.0%), air pollution(11.5%), waste material pollution(10.9%), food additives (10.0%), genetic modified organism(8.0%), endocrine disrupter(7.5%), respectively. And according to the analysis results distributed by a grade were that the concerning of a low grade(freshman, sophomore)were higher than that of a high grade(junior, senior) in the topic of water pollution, air pollution, waste material pollution. But there were high level of awareness on the topic of food additives, genetic modified organism, endocrine disrupter to the all students(freshman to senior). And according to the analysis results distributed by a major field of study were that students who major in art & athletics, liberal art and etc(public health) were show a deep concerning than that of science & engineering. Finally, the environmental education during the university class were effectively contribute to increase the awareness of the seriousness of environmental pollution problem(8.2%) and also contribute to the practical life after class also increase their consciousness of environmental problem(59.8%).