Journal of Environmental Impact Assessment 2021 KCI Impact Factor : 0.74

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2014, Vol.23, No.3

  • 1.

    A Study on the Vibration Reduction of Borehole by the Receive Distance

    송정언 , Kim,Seung-Gon , 홍웅기 | 2014, 23(3) | pp.169~176 | number of Cited : 1
    Abstract PDF
    The purpose of this study is to estimate the vibration reduction effect of the borehole which iscontrolled the vibration propagation in the ground. For this study, we measured the vibrationvelocity before and after the borehole installation. The results are as follows: The peak particlevelocity(PPV) and peak vector sum(PVS) was reduced by the borehole. And also, the deviation ofvibration velocity before and after the borehole installation showed large values in longitudinaland vertical component depending on the receive distance, and increased depending on the sizeof vibration energy. Finally, the vibration isolation efficiency was 25~35 percentage at 1.5m receivedistance, and was 4~14 percentage at 3.0m receive distance. It was found that the vibration isolationefficiency was good in small vibration energy, but was not good at long receive distance.
  • 2.

    Simulation of Water Pollution Accident with Water Quality Model

    Choi, Hyun Gu , Jun Hyung Park , Han Kun Yeun | 2014, 23(3) | pp.177~186 | number of Cited : 2
    Abstract PDF
    Depending on the change of lifestyle and the improvement of people’s living standards andrapid industrialization, urbanization of recent, demand for water is increasing rapidly. So emissionsof domestic wastewater and various industrial waste water has increased, and water quality isworsening day by day. Therefore, in order to provide a measure against the occurrence of waterpollution accident, this study was tried to simulate water pollution accident. This study simulated2008 Gimcheon phenol accident using 1,2-D model, and analyze scenario for prevent of waterpollution accident. Consequently the developed 1-D model presents high reappearance whencompared with 2-D model, and has been able to obtain results in a short simulation run time. Thisstudy will contribute to the water pollution incident response prediction system and water qualityanalysis in the future.
  • 3.

    Application of Regression Analysis Model to TOC Concentration Estimation - Osu Stream Watershed -

    박진환 , 문명진 , 한성욱 and 4 other persons | 2014, 23(3) | pp.187~196 | number of Cited : 4
    Abstract PDF
    The objective of this study is to evaluate and analyze Osu stream watershed water environment system. The data were collected from January 2009 to December 2011 including water temperature, pH, DO, EC, BOD, COD, TOC, SS, T-N, T-P and discharge. The data were used for principle component analysis and factor analysis. The results are as followes. The primary factors obtained from both the principal component analysis and the factor analysis were BOD, COD, TOC, SS and T-P. Once principal component analysis and factor analysis have been performed with the collected data and then the results will be applied to both simple regression model and multiple regression model. The regression model was developed into case 1 using concentrations of water quality parameters and case 2 using delivery loads. The value of the coefficient of determination on case 1 fell between 0.629 and 0.866; this was lower than case 2 value which fell between 0.946 and 0.998. Therefore, case 2 model would be a reliable choice.The coefficient of determination between the estimated figure using data which was developed to the regression model in 2012 and the actual measurement value was over 0.6, overall. It can be safely deduced that the correlation value between the two findings was high. The same model can be applied to get TOC concentrations in future.
  • 4.

    Determining the priority order of wetland functions

    Seungjun Lee , Choi, Hyun-Ah , LEE, Woo-Kyun and 3 other persons | 2014, 23(3) | pp.197~207 | number of Cited : 2
    Abstract PDF
    In this study, the functional priority of wetlands was determined through analysis of previous research. To determine relative importance, three processes were performed. First, quantitative values from the case studies were normalized. Second, non-quantitative values were prioritized based on standard criteria. Third, equal weight was applied as long as there was no special consideration regarding a particular value’s disproportionate priority in the research. Finally, results were grouped into large, medium, and small classes.In this study, the functions of the medium class were found to be the most significant, in the following order of priority: water supply and ground water recharge; culture and recreation; biodiversity; product; water quality control; flood control; erosion control; moderation of climate change; and provision of biochemical matter. To verify these results, we compared our findings with those of an assessment that used the Rapid Assessment Method (RAM) on the same type of study area. Whereas this comparison indicated some correlations by the culture, water storage, and genetic sustainability functions, it suggested a lack of such relationship by the water purification and flood prevention functions.
  • 5.

    Landscape Ecology and Management Measure of Urban Mountain Forest in Seoul

    KONG Wooseok , 김건옥 , Sle-gee, Lee and 1 other persons | 2014, 23(3) | pp.208~219 | number of Cited : 1
    Abstract PDF
    This work aims to establish the landscape ecological countermeasures to improve thesustainability of urban mountain forest and to enrich the biodiversity in twenty mountains of theSeoul Metropolitan City. Landscape ecological analysis was conducted based upon various criteria,such as area and elevation of mountains, flora, naturalized plants, vegetation, forest types,mountain trails, and public facilities. Various measures were suggested for the better maintenances of floristic diversity, introducedplants, vegetation and forest types of urban mountain forests. Sustainable recommendations forland use adminstration were developed for the preparations of a climate change-adapted urbanmountain forests, as well as rational managements of ecosystem, walking trails, and public facilitieswithin mountain forest. Rich and diverse natural vegetation as well as high floristic diversity were reported at mountainswith higher elevations, larger area size, and rich landscape diversity. Mountains with low elevation,small size with easy public access, however, might require an urgent action to decrease the burdensby anthropogenic disturbances and urban development.
  • 6.

    The Analysis of High Chlorophyll-a Concentration Patch in the North Marine Areas of East China Sea

    Jeong, Jong Chul | 2014, 23(3) | pp.220~226 | number of Cited : 0
    Abstract PDF
    This study investigated temporal-spatial and variations in Geostationary Ocean Color Imager(GOCI) products of parameters total suspended solids (TSS) and chlorophyll-a in the NorthMarine Areas of East China Sea.GOCI data were collected daily from February 2012 to December2012. The higher chlorophyll-a values were observed during the investigation period. The relativelylarge increase in TSS and chlorophyll-a at the sampling stations coupled with typhoon eventsduring the summer rainy period. The abnormal chlorophyll-a concentration was mainly drivenby meteorological factors such as typhoon and rainfall in the coastal areas of Jeju and the NorthMarine Areas of East China Sea. The abnormal high chlorophyll-a concentration at the majorityof the coastal stations indicate eutrophication of coastal waters, especially Red tide. The eventssuch as eutrophication and abnormal high chlorophyll-a concentration may potentially influenceoutbreak of Red Tide, detected with GOCI parameters.
  • 7.

    A Study on the Environmental Impact Assessment for the Unconventional Gas Development

    Hanna Cho , Park, Joo-Yang | 2014, 23(3) | pp.227~235 | number of Cited : 0
    Abstract PDF
    Interest has been growing worldwide in unconventional natural gas that has become anincreasingly important source of energy in the world. Unconventional gas development, includingshale gas, generally involves a larger environmental impact, compared to conventional gasdevelopment, due to its intensity and scale of the operation. There are a growing number of studieson identifying and minimizing the environmental impacts of unconventional gas development. This study aims to examines the current environmental policies and regulatory systems relatedto the unconventional gas development. The study shows that few environmental regulation existsconcerning unconventional gas development, even in the USA where unconventional gasdevelopment is most actively pursued. Regulations, however, are being developed based onstudies currently underway on health and environmental risks of unconventional gas developmentand on guidelines designed to reduce the risks. In a world where environmental regulations are ever strengthening, review the environmentalregulatory systems and guidelines about unconventional gas need to be established for Koreanfirms to understand environmental impacts of unconventional gas development they invest ortake part in, enabling them to manage and operate gas activities in a way that minimizesenvironmental damages.