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2005, Vol.14, No.6

  • 1.

    Assessment on Stabilization of Open-dumping Landfill Gas -A Case Study of Salmi Landfill-

    KIM KWANG YUL | Hong Sangpyo | 2005, 14(6) | pp.365~375 | number of Cited : 3
    Abstract PDF
    For managing and utilizing a closed municipal solid waste landfill site in environmentallysecure conditions, it is necessary to verify the stabilization level of landfill gas(LFG) and waste.For assessing LFG and waste stabilization of an open-dumping municipal solid waste landfill(Salmi Landfill) which is located at the vicinity of Chungju Reservoir which flows into PaldangReservoir that has been used for Seoul Metropolitan water supplies, the history and thesurrounding characteristics of the landfill site were surveyed.In this study, waste and LFG samples obtained from landfill site were physically andchemically analyzed, and then the analysis results were evaluated on the basis of ‘The Criteria ofLandfill Waste Stabilization(CLWS)’ that were promulgated by Korean Ministry of Environment.Based on LFG composition of Salmi landfill, CH4 was as high as 68%. In CLWS regulation,the stabilization criteria of CH4 should be lower than 5%, and the criteria of C/N ratio shouldalso be lower than 1/10. The result showed that C/N ratio of landfilled waste ranged 17.4~24.7.From this results, it was concluded that the LFG and C/N ratio stabilization level of this landfillbased on the CLWS were still actively proceeding
  • 2.

    A study of habitat use pattern of river otters (Lutra lutra) with land-cover map

    Lee, Sang-Don | 조희선 | 2005, 14(6) | pp.377~385 | number of Cited : 7
    Abstract PDF
    The Eurasian otter(Lutra lutra) is listed as No. 330 in natural monument. To manage andconserve habitat for otters, it is critical to understand which habitat components are important forotters. The objectives of this study were to analyze otter habitat characteristics in accordance withland-cover map. We investigated otter spraints and sprainting site in Geoje Island from January toDecember, 2004. with GPS coordinates. The analysis of otter habitat use pattern was used byArcview ver. 3.2 with 1: 25,000 Topology Map and field data. Otter habitat use was stronglyrelated to sites in riparian vegetation riparian(dam or river) structures. In this study, Gucheon wasa site with high coverage of riparian vegetation and unconfined channels, thus recording highernumber of spraint densities than those of Yeonchocheon. Yeonchocheon was under constructionat lower stream areas so that otter habitat use was limited. This study suggests that securingsuitable forests and riparian vegetation zone is essential for conservation of otters.
  • 3.

    Prediction of Land-cover Change in the Gongju Areas using Fuzzy Logic and Geo-spatial Information

    Dong-Ho Jang | 2005, 14(6) | pp.387~402 | number of Cited : 5
    Abstract PDF
    In this study, we tried to predict the change of future land-cover and relationships betweenland-cover change and geo-spatial information in the Gongju area by using fuzzy logicoperation. Quantitative evaluation of prediction models was carried out using a prediction ratecurve using . Based on the analysis of correlations between the geo-spatial information andland-cover change, the class with the highest correlation was extracted. Fuzzy operations wereused to predict land-cover change and determine the land-cover prediction maps that were themost suitable. It was predicted that in urban areas, the urban expansion of old and new townswould occur centering on the Gem-river, and that urbanization of areas along the interchangeand national roads would also expand. Among agricultural areas, areas adjacent to nationalroads connected to small tributaries of the Gem-river and neighboring areas would likelyexperience changes. Most of the forest areas are located in southeast and from this result we canguess why the wide chestnut-tree cultivation complex is located in these areas and thepossibility of forest damage is very high. As a result of validation using the prediction ratecurve, it was indicated that among fuzzy operators, the maximum fuzzy operator was the mostsuitable for analyzing land-cover change in urban and agricultural areas. Other fuzzy operatorsresulted in the similar prediction capabilities. However, in the prediction rate curve of integrated models for land-cover prediction in the forest areas, most fuzzy operators resulted in poorer prediction capabilities. Thus, it is necessary to apply new thematic maps or prediction models in connection with the effective prediction of changes in the forest areas.
  • 4.

    A Study on the Environmental Assessment Criteria for Designation of Conservation Zones in Urban Areas

    이상문 | YoungOk Jeon | 2005, 14(6) | pp.403~413 | number of Cited : 0
    Abstract PDF
    The environmental conservation-targeted zoning in urban planning process has beenfunctioned as securing a ecological core in urban green spaces management. Hence, thedesignation of conservation zones in land use planning is considered as a key task to achieve thesustainability of urban planning. The recently introduced pre-environmental review system forthe proposed urban plan, by which the conservative measures for urban ecosystem andlandscape are suggested in aspect of environmental impact mitigation, has played an active rolein enhancing the environmental performance degraded by wide range of development pressure.This study is aimed at drawing out of objective criteria for designation of environmentalconservation zones, which can be applied to urban planning establishment and also toenvironmental assessment process. To achieve this goal, the study adopted the followingmethods; pre-study review, analysis of existing official opinion statements released by theMinistry of Environment, contents analysis of related laws, and experts’ panel discussions onthe finally arranged criteria.The results of this research can be summarized as follows:First, the total criteria of 48 are drown out with categorizing into environment-ecological andsocio-cultural sectosr. Second, the environment-ecological part is composed of 33 criteria such as vegetation, animal, geomorphology, watershed, environmental land suitability, and etc. Here, the Degree of Ecological Function, Degree of Environmental Land Suitability, and Vegetation Map are mainly utilized. Third, the 15 socio-cultural criteria relating to the history, social ecology and landscape have such components as forest around relics, Seo-won(school), castle, tomb, landmark, skyline, natural landscape, and etc. Forth, these individual criteria can be applied to designation of each conservation zones among total of 11 conservation areas(or districts)
  • 5.

    Geochemical Behavior and Pollution of Soils in Gwangju City

    SHINSANGEUN | KimJooYong | Kangho Oh | 2005, 14(6) | pp.415~425 | number of Cited : 3
    Abstract PDF
    To examine the geochemical behavior and pollution of soils in Gwangju City, an analysis wascarried out for pH, on the contents of metals, and organic carbon. Soil samples were taken fromenvirons areas, industrial areas and downtown areas. The major factor controlling the behaviorof metallic elements in the soil was chemical weathering of clay mineral in the environs areas,industrialization, and urbanization. Heavy metals including Cu, Pb and Zn were highlyenriched for the samples from central part of downtown area. This indicated that theurbanization and the industrialization affected soil pollution. The results show that soilpollution in a metropolitan city which is caused by harmful heavy metals is severest in thecenter of the city. In consequence, it is inevitable that practical measures should be taken toprevent soil pollution expansion.
  • 6.

    A Study of Air Dispersion Modeling in Highway Environmental Impact Assessment

    Youn-Seo Koo | Jeon,Eui-chan | seong ho lee and 4other persons | 2005, 14(6) | pp.427~441 | number of Cited : 2
    Abstract PDF
    In order to choose proper dispersion model and emission factors suitable in Korea inevaluating the effect of pollutants emitted by the vehicles in highway on nearby area, variousroad dispersion models and vehicle emission factors were reviewed.With theoretical inter-comparisons of the exiting models for line source, CALINE 3 andCALINE 4 models which were suggested by US EPA were selected as the road dispersionmodels for further evaluation with the measurement. The emission factors suggested by KoreanMinistry of Environment was turned out to be appropriate since the classification of vehiclekinds was simple and easy to apply in Korea.The comparisons of predicted concentrations by CALINE 3 and 4 models with themeasurements in flat, fill and bridge road types showed that CO and PM-10 were in goodagreements with experiments and the differences between CALINE 3 and 4 models arenegligible. The model concentrations of NO2 by CALINE 4 were also in good agreement with the measurement but those by CALINE 3 were over-predicted. The discrepancies in CALINE 3 model were due to rapid decay reaction of NO2 near the highway, which was not included in CALINE 3 model. For the road type with one & two side cutting grounds, the similar patterns as the flat & fill road type for CO, PM10, & NO2 were observed but the number of data for comparison in these cases were not enough to draw the conclusion. These results lead to the conclusion that CALINE4 model is proper in road environmental impact assessment near the highway in flat, fill and bridge road types.