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2019, Vol.28, No.3

  • 1.

    Analysis of PM2.5 Concentration and Contribution Characteristics in South Korea according to Seasonal Weather Patterns in East Asia : Focusing on the Intensive Measurement Periods in 2015

    Kipyo Nam | 이대균 | Limsuk Jang | 2019, 28(3) | pp.183~200 | number of Cited : 2
    Abstract PDF
    In this study, the characteristics of seasonal PM2.5 behavior in South Korea and other Northeast Asian regions were analyzed by using the PM2.5 ground measurement data, weather data, WRF and CMAQ models. Analysis of seasonal PM2.5 behavior in Northeast Asia showed that PM2.5 concentration at 6 IMS sites in South Korea was increased by long-distance transport and atmospheric congestion, or decreased by clean air inflow due to seasonal weather characteristics. As a result of analysis by applying BFM to air quality model, the contribution from foreign countries dominantly influenced the PM2.5 concentrations of Baengnyeongdo due to the low self-emission and geographical location. In the case of urban areas with high self-emissions such as Seoul and Ulsan, the PM2.5 contribution from overseas was relatively low compared to other regions, but the standard deviation of the season was relatively high. This study is expected to improve the understanding of the air pollutant phenomenon by analyzing the characteristics of PM2.5 behavior in Northeast Asia according to the seasonal weather condition change. At the same time, this study can be used to establish the air quality policy in the future, knowing that the contribution of PM2.5 concentration to the domestic and overseas can be different depending on the regional emission characteristics.
  • 2.

    Categorization of Cities in Gyeonggi-do Using Ecosystem Service Bundles

    Ilkwon Kim | 김성훈 | 이주은 and 1other persons | 2019, 28(3) | pp.201~214 | number of Cited : 1
    Abstract PDF
    The concept of ecosystem services is important for the effective management of regional ecological resources. Multiple ecosystem services provided by regional ecosystems are represented as ecosystem service bundles, which define the co-occurrent ecosystem services in a specific region. Bundles provide useful information to identify regional characteristics of ecosystem services and categorize sub-regions with similar patterns of ecosystem service provision. We assessed eleven ecosystem services using modeling approaches and statistical data and produced bundles of cities in Gyeonggi-do.We also conducted principal component analysis and cluster analysis to categorize these cities according to the characteristics of ecosystem services. The results indicated that the cities in Gyeonggi-do were categorized into three groups depending on the types of provision, regulation, and cultural services, and were designated as urbanized, urban-forest, agriculture, or forest cities. These groups were influenced by land use patterns reflecting regional social-environmental features. The results provide useful information for identifying regional ecosystem services and facilitate decision making in regional ecosystem service management.
  • 3.

    A Study on Grade Classification for Improvement of Water Quality and Water Quality Characteristics in the Han River Watershed Tributaries

    Yong-Chul Cho | Min-Ji PARK | 신경용 and 3other persons | 2019, 28(3) | pp.215~230 | number of Cited : 2
    Abstract PDF
    The objective of this research is to evaluate the water quality characteristics using the statistical analysis of major tributaries in the Han River and to provide water quality improvement plan by selecting tributaries that should be preferentially managed by river grade classification method. The major 15 tributaries in Han River watershed were monitored for discharge and water quality during January-December 2017. As a result of the correlation analysis, the river discharge has been not correlation with other water quality constituents (p>0.05) but COD and TOC were significantly correlated (r=0.957, p<0.01). The main cause of water quality fluctuation was organic pollutants and nutrients in the principal component analysis (PCA) method. The BOD, COD, TOC, TN, and TP were found to be significantly different (p<0.05) by seasonal in result of one-way ANOVA analysis. Result of river grade classification by quantitative indicators the tributaries requiring improvement of water quality were Gulpocheon, Anyangcheon, Wangsukcheon, and Tancheon which affected by wastewater treatment plant. In this research, we determined tributaries that need to improve the water quality of Han River watershed and it can be used as an important data for efficient water quality management.
  • 4.

    Vascular Plant of the Construct-Reserved Site for Eco-Forest of Mt. Daeun in Yangsan-si, Gyeongsangnam-do

    강미영 | Tae-Woon Kim | Moon- Hyun Shilk | 2019, 28(3) | pp.231~244 | number of Cited : 1
    Abstract PDF
    The purpose of this study is to offer the basic information for the rational management plan in construction and running of eco-forest by analyzing the vascular plant of the constructreserved site of eco-forest in Mt. Daeun, Yangsan-si, Gyeongsangnam-do. The vascular plants were 280 taxa; 75 families, 179 genera, 245 species, 3 subspecies, 28 varieties and 4 forma. The Korean endemic plants were 6 taxa including Pseudostellaria coreana, Stewartia pseudocamellia, Primula modesta var. hannasanensis and so forth. The rare plants were Juniperus chinensis var.sargentii, Prunus yedoensis, Primula modesta var. hannasanensis, Chionanthus retusus and Scopolia japonica. The naturalized plants were 14 taxa including Rumex acetosella, Lepidium apetalum, Trifolium repens, Oenothera biennis, Veronica persica and so forth. The invasive alien plants were Rumex acetosella and Ambrosia artemisiifolia. pecific plant species by floristic region were total 24 taxa; Prunus yedoensis and Primula modesta var. hannasanensis in class Ⅴ, Juniperus chinensis var. sargentii and Acer pictum subsp. mono in class IV, 5taxa including Dryopteris bissentiana, Scolopolia japonica and so forth in class III, Pseudostellaria coreana, Potentilla dickinsii and Chionanthus retusus in class II, 12 taxa including Acotinum jaluense, Clematis patens and so forth in class I.
  • 5.

    Analysis of Water Quality Variation by Lowering of Water Level in Gangjeong-Goryong Weir in Nakdong River

    park dae yeon | Park, Hyung Seok | sungjin kim and 1other persons | 2019, 28(3) | pp.245~262 | number of Cited : 4
    Abstract PDF
    The objectives of this study were to construct a three-dimensional water quality model (EFDC) for the river reach between Chilgok Weir and Gangjeong-Goryong Weir (GGW) located in Nakdong River, and evaluate the effect of hydraulic changes, such as water level and flow velocity, on the control of water quality and algae biomass. After calibration, the model accurately simulated the temporal changes ofthe upper and lower watertemperatures that collected every 10 minutes, and appropriately reproduced changes in organic matter, nitrogen, phosphorus, and cyanobacteria. However, the simulated values were overestimated for the diatoms and green algae cell density, possibly due to the uncertainties of the parameters associated with algae metabolism and the lack of zooplankton predation function in the simulations. As a result of scenario simulation of running the water level of GGW from EL. 19.44 m to EL. 14.90 m (4.54 m drop), Chl-a and algae cell density decreased significantly.In particular,the cyanobacteria on the surface layer, which causes algal bloom, declined by 56.1% in the low water level scenario compared to the existing management level. The results of this study are in agreement with the previous studies that maintenance of critical flow velocity is effective for controlling cyanobacteria, and imply that hydraulic control such as decrease of water level and residence time in GGW is an alternative to limit the overgrowth of algae.
  • 6.

    Facilities in Urban Streams – A Case Study of Jeonjucheon in Jeonju-si –

    Lim, Hyun-Jeong | Jeong, Moonsun | 2019, 28(3) | pp.263~274 | number of Cited : 0
    Abstract PDF
    The purpose of this study is to examine a monitoring method, management zones, and maintenance strategies for water friendly facilities in urban streams after the completion of ecological restoration projects. Maintenance monitoring items are composed of ‘use space& facilities’, ‘trails&bike roads’, ‘access’, and ‘boards’. The evaluation standards of water friendly facilities are ‘maintenance conditions’, ‘safety’, and ‘usage level’ which are rated as ‘good’, ‘moderate’, and ’poor’. Through a field survey and evaluation of 15 stream sections in Jeonjucheon, the management levels of each water friendly facility are determined as ‘priority maintenance’, ‘general maintenance’, ‘maintain/remove’, and ‘remove’. Based on the evaluation results, management zones and maintenance strategies are proposed for each stream section. As a results, the stream sections of J2, J3, J4, and J9 which have 5 to 9 facilities with ‘priority maintenance’ are determined as ‘intensive management zone’. The stream sections of J5, J6, J7, J8, J11, and J14 which have 1 to 3 facilities with ‘priority maintenance’ are determined as ‘regular management zone’. The stream sections of J1, J10, J12, J13, and J15 which have no facilities with ‘priority maintenance’ are determined as ‘minimum management zone’ . The process of monitoring & evaluation system and determining management zones can be applied to establish a systematic maintenance plan for waterfriendly facilities by participation of governance in the future.
  • 7.

    Connectivity Assessment Based on Circuit Theory for Suggestion of Ecological Corridor

    Yoon, Eun-Joo | 김은영 | JIYEON KIM and 1other persons | 2019, 28(3) | pp.275~286 | number of Cited : 1
    Abstract PDF
    In order to prevent local extinction of organisms and to preserve biodiversity, it is important to ensure connectivity between habitats. Even if the habitat is exposed to various disturbance factors, it is possible to avoid or respond to disturbances ifthey are linked to other habitats. Habitat connectivity can be assessed from a variety of perspectives, but the importance of functional connectivity based on species movement has been emphasized in recent years due to the development of computational capabilities and related software. Among them, Circuitscape, which is a connectivity evaluation tool, has an advantage it can provide detailed reference data for the city planning because it maps ecological flows on individual grid based on circuit theory. Therefore, in this study, the functional connectivity of Suwon was evaluated by applying Circuitscape and then, the ecological corridor to be conserved and supplemented was suggested based on it. The results of this study are expected to effectively complement the methodology related ecological corridor/axis, which was previously provided only in the form of a diagram, and to be effective in management of development project and urban planning.
  • 8.

    A Study on the Guidelines for Creating Wildlife Crossing through Environmental Impact Assessment

    Park, Yong-Su | Shim Yun Jin | 2019, 28(3) | pp.287~298 | number of Cited : 0
    Abstract PDF
    This study found that wildlife crossing created through environmental impact assessments didn’t reduce the number of wildlife accidents on the road by review of “A Study on the Legal and Institutional Review for Reproving Bio-Mobile in Environmental Impact Assessment(2018)”. Specific considerations to be reviewed at each stage of the environmental impact assessment consultation were presented for practical site application. Therefore, in this study, the consultation steps for environmental impact assessment were presented in five stages, including planning, design, construction, monitoring, maintenance and management, and detail of the items to be reviewed by public officer. It will be able to prevent loss of habitats and improve biodiversity by improving the practice and institutional problems that were planned and designed at the time of construction.
  • 9.

    A Study on Survey and Analysis of Designated Status of Wildlife Protected by City/Do Ordinance

    CHU YEOUNSU | Youngho Cho | Lee, Tae Ho and 2other persons | 2019, 28(3) | pp.299~311 | number of Cited : 0
    Abstract PDF
    This study was conducted to investigate and analyze the designation status of the Local Wildlife Conservation Ordinance for the conservation and management of wild fauna and flora, and to elucidate the problems and improvement directions. We compared and analyzed the provisions of the wildlife conservation ordinance of 17 regional local governments. After that, the designation status of Wildlife Protected by City/Do was investigated and the appropriateness was confirmed based on guidelines and laws. The ordinances related to wildlife were enacted in all municipalities, and provisions such as selection criteria, protection measures, and actlimitations were commonly reflected. The provisions were varied depending on the characteristics of each local government, including details of flag species, the addition of species in the restoration promotion plan as criteria for selection and provision of protection and restoration of habitats. Since 2006, when the wildlife protected by City/Do designation and protection guidelines have been established, the protected wildlife have increased sharply, and there has been newly designated regional local government within the past one or two years. However, in some local government, protected wildlife has been designated for more than 10 years, and there are many that do not meet the selection criteria. Therefore, more scientific and objective selection criteria and methods should be constructed for the selection of species suitable for the purpose of the Wildlife protected by City/Do.
  • 10.

    A Study on Environmental Impact Assessment Guidelines for Marine Environments in Construction Projects of Offshore Waste Disposal Landfills

    Lee Hae Mi | Min-Ho Son | Tae-Soon Kang and 1other persons | 2019, 28(3) | pp.312~331 | number of Cited : 1
    Abstract PDF
    An offshore waste disposal facility refers to a landfill site for final landfilling of stabilized inorganic solid waste such as land and marine waste incineration materials, and the aim of such a facility is to solve the problem of insufficient waste disposal space on land and create and develop environmentally friendly marine spaces. The purpose of this study is to prepare guidelines for the construction of offshore waste disposal facilities, which reflect the need and importance of paying sufficient heed to environmental considerations from the initial stage of the project, in order to investigate, predict, and assess how such guidelines will affect the marine environment in relation to the construction of offshore waste disposal facilities, with the goal of minimizing the impact on and damage to the environment. Forthe purpose of this research, guidelines focusing on the construction of offshore waste disposal facilities were derived through an analysis of domestic cases and similar foreign cases and an assessment of their level of compliance with existing EIA guidelines through the operation of a discussion forum. In order to review the EIA report on similar cases in Korea, 17 EIA documents (2005~2016) for dredged soil dumping areas and ash ponds of thermal power plants were analyzed to investigate the status of marine organisms, marine physics, marine water quality, and marine sediment and to understand what types of problems can occur and what improvement measures can be taken. The purpose of these guidelines were to minimize damage to the marine environment by promoting EIA protocols in accordance with scientific and systematic procedures, to reduce the consultation period related to projects, to resolve social conflicts, and to reduce economic costs.
  • 11.

    Treat ability Study on the Remediation Groundwater Contaminated by TPH Cr6+ : Lab-Scale Experiment

    이규범 | Yoon-Young Chang | 2019, 28(3) | pp.332~345 | number of Cited : 0
    Abstract PDF
    The purpose of the study is to evaluate the treat ability of contaminated groundwater with TPH and (or) Cr6+ . Laboratory scale tests were performed for oil/water separation, dissolved air flotation (DAF), coagulation and precipitation, and filtration with sand and activated carbon respectively. Two times of oil/water separation tests for total 40 minutes of separation or separating time shows 90.2 % of TPH removal rate. In case of DAF test for high TPH sample, the TPH removal rates were not varied significantly by the variation of microbubble size. However, tests for low TPH samples show that TPH removal rate increases as microbubbles are smaller. When coagulant was added to sample for DAF test, TPH removal rate was increased 12.3 %. SS removal rate by DAF was 97.9 % at 16-40 μm and it was increased as the size of microbubble is reduced. Tests for coagulation and precipitation were performed to evaluate the removal of Cr6+ in groundwater. The increase of FeSO4 dosage increased Cr6+ removal rate in the coagulation and precipitation process. As the amount of activated carbon in the filter media increased TPH removal rate in the filtration process. SS removal rate by the filtration was 96.7 % similar to the results of DAF process tests. The filtration process treats TPH and SS. Best design parameters are determined as the size of sand is 425-850 μm and the ratio of activated carbon and sand is 50:50.