Journal of Environmental Impact Assessment 2021 KCI Impact Factor : 0.74

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pISSN : 1225-7184

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2007, Vol.16, No.1

  • 1.

    An Estimation of Emission Reduction Rates to Achieve theTarget Air Quality in Seoul Metropolitan Area

    Jeongsoo Kim , 홍지형 , Jung Dong Il and 3 other persons | 2007, 16(1) | pp.1~13 | number of Cited : 1
    Abstract PDF
    This study was carried out to estimate the emission reduction rates for the regional allowableemissions by special measures to achieve the target air quality in Seoul Metropolitan Area(SMA).A modeling system was designed to validate the details in enforcement regulations set up bylocal governments based on the current status and plans for air quality improvement.Modeling system was composed of meteorological model (MM5), emission model (SMOKE),and air quality model (CMAQ). Predicted results by this system show quiet well not only dailyair pollutants concentration but also the tendencies of wind direction, wind speed andtemperature.To achieve the target air quality in Seoul Metropolitan Area (SMA), emission allowances areestimated by seasons and regions. Referring to the base year 2002, it was estimated thatemission reduction rates to achieve the intermediate goal in 2007 were 14.2% and 16.6% forNOx and PM10, respectively. It was also estimated that 52% of NOx and 48% of PM10reductions from the base year 2002 would be required to accomplish the air qualityimprovement goal of 22 ppb for NO2, and 40 mg/m3for PM10 in year 2014.To improve NO 2 and PM 10 concentration through emissions reduction policies, it was foundthat emissions reduction for the on-road mobile sources would be the most effective in SMA.
  • 2.

    Effect on Phytoplankton by Hydraulic-Gun-Aerators andSelective Withdrawal in Hoengseung Reservoir

    Choi, Ilhwan , Hakchul Kim | 2007, 16(1) | pp.15~26 | number of Cited : 1
    Abstract PDF
    Surface water is the main drinking water source in Korea. Algal bloom caused byphytoplankton in reservoir is common event in every summer season. To prevent or control thealgal blooms, artificial circulation system has been adopted in many reservoirs, includingHoengseung reservoir. Total 7 hydraulic-gun-aerators were installed around the intake tower inHoengseung reservoir since 2000. This study is to elucidate the effects of hydraulic-gun-aeratorson phytoplankton bloom, pH, DO, temperature and evaluate the selective withdrawal andvertical distribution of phytoplankton by means of submersible fluorescence probe, whichfeatures high correlation with a standard ISO method (r=0.90, P<0.0001) for chlorophyll-aquantification.
  • 3.

    Immobilization Characteristics of Hexavalent Chromium ContaminatedSoils Treated with Phosphate and Chromium Reducing Agent

    Euisang Lee | 2007, 16(1) | pp.27~33 | number of Cited : 1
    Abstract PDF
    Hexavalent chromium-contaminated soils are encounted at many unregulated discharge andimproper handling of wastes from electroplating, leather tanning, steelmaking, corrosioncontrol, and wood preservation industries. Contamination of hexavalent chromium in the soil isa major concern because of its toxicity and threat to human life and environment.Current technologies for hexavalent chromium-contaminated soil remediation are usuallycostly and/or cannot permanently prohibit the toxic element from entering into the biosphere.Thus, as an alternative technique, immobilization is seen as a cost-effective and promisingremediation technology that may reduce the leachable potential of hexavalent chromium.The purpose of this paper is to develope an immobilization technique for the formation of thegeochemically stabilized hexavalent chromium-contaminated soil from the reactions of labilesoil hexavalent chromium forms with the added soluble phosphate and chromium reducingagent. From the liquid phase experiment, reaction order of chromium reducing agent, solublephosphate, alkali solution shows the best removal efficiency of 95%. In addition, actual soilphase experiment demonstrates up to 97.9% removal efficiency with 1:1 molar ratio ofchromium reducing agent and soluble phosphate.These results provide evidence for the potential use of soluble phosphate and chromiumreducing agent for the hexavalent chromium-contaminated soil remediation.
  • 4.

    Environmental Assessment of Vitrified Mine Tailing Aggregate UsingVarious Leaching Methods

    Sang-Woo Lee , Lee Sang Hoon , Lee,Ki-Gang and 1 other persons | 2007, 16(1) | pp.35~43 | number of Cited : 4
    Abstract PDF
    Vitrified aggregates obtained by using mine tailings were evaluated using various leachingmethods to assess their environmental safety. The leaching tests in this study includecontinuous batch leaching, Dutch availability leaching, pH-stat and tank diffusion test as wellas TCLP (Toxicity Characteristic Leaching Procedure), which is commonly adopted.Vitrification technique has successfully been applied treating some solid wastes containing highlevel of heavy metals, such as EAF (Electric Arc Furnace) dust and mine tailings. The potentiallymost leachable element among trace metals was As and theoretically about 7% of totalconcentrations in the aggregate can be released under extreme condition. Zinc was leachedabout 4% and the other trace metals including Cd, Cr and Pb were hardly released from thevitrified mine tailing aggregate.
  • 5.

    Principles and Guidelines for Social Impact Assessment:A Critical Review on the US Case

    Jung, Juchul , Jae Young Lim | 2007, 16(1) | pp.45~58 | number of Cited : 4
    Abstract PDF
    Despite the ubiquitous practice of environmental impact assessment around the world, socialimpact assessment has been alienated from assessment process from the beginning. Not until1993 was ‘Interorganizational Committee’ established in the United States to prepare for‘Principles and Guidelines for Social Impact Assessment.’ This study is an attempt to criticallyexamine US ‘Principles and Guidelines.’ First, the study traces history of social impactassessment to reveal why the latter became “the orphan in the assessment process.” Second, itcritically reviews ‘Principles and Guidelines’ to find its merits and defects. For instance, aprinciple regarding environmental justice is perceived as necessary as society has becomeconscious of social justice and equity while putting too much emphasis on predictive traits ofsocial impact assessments only fosters “checklist mentality.” Third, the study reflects on‘Principles and Guidelines’ in particular and social impact assessment in general in order toprobe what is social impact assessment. To do so, it pays attention to scholars, who havecriticized technocratic and procedural elements of ‘Principles and Guidelines.’ They show thatsocial impact assessment is philosophically and methodologically teleological in that “fluid andcontested meanings” between social impacts and the public are meaningful in itself. Andsimple procedural guarantee of the public involvement, they argue, is not enough to definesocial impacts. Lastly, from the critical analysis of ‘Principles and Guideline,’ the study looks foralternatives to improve how to assess social impacts in a Korean context.
  • 6.

  • 7.

    Analysis of Origin Matter of Blackish Water in Dam Reservoir During Winter

    이요상 , 신현상 , 이혜숙 and 1 other persons | 2007, 16(1) | pp.69~77 | number of Cited : 0
    Abstract PDF
    This study has been conducted to assess blackish-water phenomena in Dam reservoir. Tosearching for the reason, we survey physical changes in reservoir and analyze metal andorganic content in particulate materials and water.The blackish-water phenomena in lake A are occurred with turbidity increases in turnoverseason irregularly. It was reported on 6 Jan. 2005 weakly and the water column mixed with35~40m depth and water temperature shows 7˚C. The turbidity of AD and AM site increasedup to 20NTU. Especially, AN site shows 27NTU, such a result makes that Dam managerconclude it to blackish-water phenomena. The results of sequential extraction analysis showthat over 80% of Al, Cr and Fe is existed in residual form in sediment. On the other hand, themost part of Mn shows exchangeable and carbonates form, which have a good possibility ofrelease to water column. Mn contents in pore waters of the sediment samples are also found tobe ~4 times higher than Fe contents. The metal contents in pore water of different dam sites arein order of AN (Fe: 9.98, Mn: 40.6) > AD(8.33, 37.5) > DD(1.91, 2.55).According to the results of extracted organic materials from sediment, humic substances isoccupied with over 85% in total organic carbon including 23~45% of humic acid (HA) and0.9~8.5% of fulvic acid (FA). However, HA content in pore water is not detectable while FAcontents, acid-soluble humic fractions is higher than that of sediment(10~15%). whichindicating that FA is a main humic components affecting water color. The color unit per DOC ofFA in pore waters of different dam sites are found to be higher in lake A than lake D. From the results, it could be suggested that blackish-water phenomena of lake A are mainly arise from higher concentration of Mn and water soluble organic fractions (e.g., FA) released from sediments as well as the strength of turnover in Dam reservoir.
  • 8.

    Estimating the Pollution Delivery Coefficient with Consideration ofCharacteristics Watershed Form and Pollution Load Washoff

    Ha, Sungryong , Myongsoon Bae , 박정하 | 2007, 16(1) | pp.79~87 | number of Cited : 2
    Abstract PDF
    The performance of a stream water quality analysis model depends upon many factorsattributed to the geological characteristics of a watershed as well as the distribution behaviors ofpollutant itself on a surface of watershed.Because the model run has to import the pollution load from the watershed as a boundarycondition along an interface between a stream water body and a watershed, it has been used tointroduce a pollution delivery coefficient to behalf of the boundary condition of loadimportation.Although a nonlinear regression model (NRM) was developed to cope with the limitation ofa conventional empirical way, this an up-to-date study has also a limitation that it can’t beapplied where the pollution load washed off (assumed at a source) is less than that delivered(observed) in a stream.The objective of this study is to identify what causes the limitation of NRM and to suggesthow we can purify the process to evaluate a pollution delivery coefficient using many fieldobserved cases. As a major result, it was found what causes the pollution load delivered tobecomes bigger than that assumed at the source. In addition, the pollution load discharged to astream water body from a specific watershed was calculated more accurately.