Journal of Environmental Impact Assessment 2021 KCI Impact Factor : 0.74

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pISSN : 1225-7184

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2021, Vol.30, No.5

  • 1.

    Development of High-frequency Data-based Inflow Water TemperaturePrediction Model and Prediction of Changesin Stratification Strength of Daecheong Reservoir Due to Climate Change

    HANJONGSU ORD ID , sungjin kim ORD ID , Kimdongmin ORD ID and 4 other persons | 2021, 30(5) | pp.271~296 | number of Cited : 0
    Abstract PDF
    Since the thermal stratification in a reservoir inhibits the vertical mixing of the upper and lower layers and causes the formation of a hypoxia layer and the enhancement of nutrients release from the sediment, changes in the stratification structure of the reservoir according to future climate change are very important in terms of water quality and aquatic ecology management. This study was aimed to develop a data-driven inflow water temperature prediction model for Daecheong Reservoir (DR), and to predict future inflow water temperature and the stratification structure of DR considering future climate scenarios of Representative Concentration Pathways (RCP). The random forest (RF)regression model (NSE 0.97, RMSE 1.86°C, MAPE 9.45%) developed to predict the inflow temperature of DR adequately reproduced the statistics and variability of the observed water temperature. Future meteorological data for each RCP scenario predicted by the regional climate model (HadGEM3-RA) was input into RF model to predict the inflow water temperature, and a three-dimensional hydrodynamic model (AEM3D) was used to predict the change in the future (2018~2037, 2038~2057, 2058~2077, 2078~2097) stratification structure of DR due to climate change. As a result, the rates of increase in air temperature and inflow water temperature was 0.14~0.48°C/10year and 0.21~0.41°C/10year,respectively. As a result of seasonal analysis, in all scenarios except spring and winter in the RCP 2.6, the increase in inflow water temperature was statistically significant, and the increase rate was higher as the carbon reduction effort was weaker. The increase rate of the surface water temperature of the reservoir was in the range of 0.04~0.38°C/10year, and the stratification period was gradually increased in all scenarios. In particular, when the RCP 8.5 scenario is applied, the number of stratification days is expected to increase by about 24 days. These results were consistent with the results of previous studies that climate change strengthens the stratification intensity of lakes and reservoirs and prolonged the stratification period, and suggested that prolonged water temperature stratification could cause changes in the aquatic ecosystem, such as spatial expansion of the low-oxygen layer, an increase in sediment nutrient release, and changed in the dominant species of algae in the water body.
  • 2.

    A Study on the Land-Use Related Assessment Factors in Korean Environmental Impact Assessment

    PARKSANGJIN ORD ID , Dong Kun Lee ORD ID , Seulgi Jeong ORD ID | 2021, 30(5) | pp.297~304 | number of Cited : 0
    Abstract PDF
    The environmental impact assessment(EIA) project in Korea has undergone changes and revisions in various evaluation items for about 30 years after the introduction of the Environmental Conservation Act (1997). However, despite the importance of land use evaluation items under the current EIA Act, there are insufficient studies to consider. Therefore, this study focused on the landuse evaluation items based on the EIA guidelines, reviewed 90 of the evaluation documents and consultation documents, and tried to suggest implications and supplementary points forthe domestic EIA land-use evaluation items. As a result, the paradigm was changing from land efficiency centered on development in the past to land efficiency centered on the natural environment and resource conservation. However, in spite of the manual for fitting the paradigm change, opinions on the conservation of the natural environment are still being drawn in the consultation document, so it needs improvement. Two improvements in the impact assessment process suggested in this study are the establishment of standardized spatial data and a quantitative impact and reduction method evaluation tool based on it. In particular, there is a need for a plan evaluation tool for land use arrangement and distribution that can solve the needs of minimizing damage to the natural environment and securing green space and a green network.
  • 3.

    A Study on the Management of Landscape for Rural Sprawling Development

    Heeseung Yang ORD ID | 2021, 30(5) | pp.305~316 | number of Cited : 0
    Abstract PDF
    Sprawling development factors in rural areas are adversely affecting the rural landscape and furtherthreatening the safety of localresidents. Through the case of Jinan-gun, the government intends to promote sustainable preservation and improvement of beautiful rural landscapes by studying landscape management plans for sprawling development factors and suggesting landscape and environmental improvement plans. In order to analyze the problems of the target site, opinions were collected through analysis of the surrounding environment and resident interviews. As a result of the analysis, in case of Jinan-gun, odorreduction management in harmful facilities was the most urgent, and this study planned the relocation of harmful facilities and ecofriendly smart livestock districts.
  • 4.

    Temporal-spatial Analysis of Environmental Impact and Locational CharacteristicsforIndustrial Complex Projectsin South Korea

    Hyun-Jin,Choi ORD ID , Ji Hyeon Park ORD ID , Jong-Yoon Park ORD ID | 2021, 30(5) | pp.317~327 | number of Cited : 0
    Abstract PDF
    Industrial complexes have been played an important role in various aspects such as national industrial development, economic growth. However, it is a cluster of manufacturing facilities which has a great impact on the surrounding area and the overall domestic environment during the operation of the facility. In this study, environmental influences and siting characteristics of industrial complexes were investigated based on the environmental impact assessment report from 2009 to 2019. The development tendency of industrial complexes is continuous decline, and major development areas are Gyeonggi, Gyeongsang and Chungcheong areas. We also confirmed that the average area of defenestration due to industrial complex is on the decline. Furthermore, the residential area and educational facilities, and the exposed population affected by industrial complex is constantly increased.
  • 5.

    Review of Environmental Impact Assessment Re-consulting System – A Comparative Analysis of Korea and Foreign Countries –

    Jin-Oh Kim ORD ID , Yong-Joon Joo ORD ID | 2021, 30(5) | pp.328~338 | number of Cited : 0
    Abstract PDF
    EIA consultation is a final decision-making process that enables a variety of stakeholders to participate in and to share important information about the expected environmental impacts caused by development projects. However, this process is often undermined through re-consultation processes by significant changes in the proposed plans. EIA re-consultation is a necessary process when an approved plan needs to be changed for a variety of importantreasons including the changes of land use, delay of construction, and surrounding environments. EIA re-consultation is also important to resolve conflicts among stakeholders and to respond flexibly to unexpected changes in surrounding environment. This study aims to analyze the operation status and the problems of current institutional systems of EIA re-consultation, and to draw implications by reviewing institutional systems of other countries such as U.S. EU, Scotland, and Japan. On the basis of the previous analysis, we propose recommendations to improve the existing EIA re-consultation process. We expect this study helps understand operation status and problems of EIA re-consultation, and provides meaningful implications to improve the existing institutional systems and practice of re-consultation.