2017, Vol.26, No.6

A Study on Categorizing Ecosystem Groups for Climate Change Risk Assessment – Focused on Applicability of Land Cover Classification -

In-Ae Yeo , Haejin Bae , Seungbum Hong | 2017, 26(6) | pp.385~403 | number of Cited : 2

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Zooplankton Community as an Indicator for Environmental Assessment of Aquatic Ecosystem: Application of Rotifer Functional Groups for Evaluating Water Quality in Eutrophic Reservoirs

Hye-Ji Oh , Kwang-Hyeon Chang , 서동일 and 5 other persons | 2017, 26(6) | pp.404~417 | number of Cited : 2

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Spatial and Seasonal Water Quality Variations of Han River Tributries

이영준 , Min-Ji PARK , Ju Yeon Son and 8 other persons | 2017, 26(6) | pp.418~430 | number of Cited : 5

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The quality of surface water is a very important issue to use various demands like as drinking water, industrial, agricultural and recreational usages. There has been an increasing demand for monitoring water quality of many rivers by regular measurements of various water quality variables. However precise and effective monitoring is not enough, if the acquired dataset is not analyzed thoroughly. Therefore, the aim of this study was to estimate differences of seasonal and regional water quality using multivariate data analysis for each investing tributaries in Han River. Statistical analysis was applied to the data concerning 11 mainly parameters (flow, water temperature, pH, EC, DO, BOD, COD, SS, TN, TP and TOC) for the time period 2012∼2016 from 12 sampling sites. The seasonal water quality variations showed that each of BOD, TN, TP and TOC average concentration in spring and winter was higher than that of summer and fall, respectively. In summer each flow rate and average concentration of SS was higher than any other seasons, respectively. The correlation analysis were explained that EC had a strong relationship with BOD (r=0.857), COD (r=0.854), TN (r=0.899) and TOC (r=0.910). According to principal component analysis, five principal components (Eigenvalue > 1) are controlled 98.0% of variations in water quality. The first component included TP, DO, pH. The second component included EC, TN. The third component included SS. The fourth component included flow. The last component included Temp. Cluster analysis classified that spring is similar to fall and winter with water quality parameters. AnyA, WangsA, JungrA and TancA were identified as affected by organic pollution. Cluster analysis derived seasonal differences with investigating sites and better explained the principal component analysis results.

Review and Discussion on Policy and Legal System for River Environments Management in Korea

Seung-Hoon Chun | 2017, 26(6) | pp.431~444 | number of Cited : 3

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Estimation of Peak Water Level Based on Observed Records and Assessment of Inundation in Coastal Area – A Case Study in Haeundae, Busan City –

Saekyul Ahn , Lee, Dong Kun | 2017, 26(6) | pp.445~456 | number of Cited : 2

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A Preliminary Study for Identifying Soil Management Area in Environmental Impact Assessment on Development Projects

Jong Sung Kim , Choong-Ki Kim , Keunje Yoo and 1 other persons | 2017, 26(6) | pp.457~469 | number of Cited : 6

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The Study on the Prediction of Algae Occurrence by the Multiple Regression Analysis After Weir Construction at Namhan River

Seungeun Oh , 안홍규 , 채수권 | 2017, 26(6) | pp.470~478 | number of Cited : 1

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This study was classified into two groups, normal season group and drought season group, by the cluster analysis using the weather and water quality data from 2012 to 2015, using SPSS 18 version. Also each cluster was classified into three spaces, Gangcheon, Yeoju and Ipoh weir. We performed the multiple regression analysis with each monthly data that concentration of Chl-a was more than algae warming level. 6 groups classified in time and space were analyzed by the correlation analysis between concentration of Chl-a and 3 weather, 11 water quality and discharge factors. We developed Chl-a prediction equations of each group with independent variables of the multiple regression analysis applying to the correlation result. The result of cluster analysis was that the period was divided into two groups, normal group(2012- 2013) that total annual precipitation rate was normal and drought group(2014-2015) that total annual precipitation rate was less than 1,000 mm/hr, in time. The months that concentration of Chl-a was more than algae warming level in each group classified by cluster analysis were that the normal group was 3~8 and drought group was 3 and 6~10. The correlation result between Chl-a and weather, water quality and discharge factors for each 6 group was that relationships between Chl-a and water, discharge factors were high in the drought group more than in normal group at all weirs. This was influenced by velocity reduction and increasing HRT according to the intense drought. Weather, water quality and discharge factors that were high correlation with Chl-a were applied to independent variables of Chl-a prediction equations and each equations were developed. Among them, Each adjusted R square of Prediction equations for Chl-a in each group at Ipoh weir where is located in Namhan river downstream and is directly connected to Paldang dam were normal group = 0.920 and drought group = 0.818. It’s showed the high linear.

The Optimal Energy Mix in South Korea’s Electricity Sector for Low Carbon Energy Transition in 2030: In Consideration of INDC and Sequential Shutdown of Decrepit Nuclear Power Plants

김동윤 , 황민섭 | 2017, 26(6) | pp.479~494 | number of Cited : 1

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Feasibility Study of Environmental Impact Assessment as Instrument for Alternative Dispute Resolutions – Case Study: Environmental Conflicts of Mungjangdae Hot Spring Resort Development –

Hong Sangpyo | 2017, 26(6) | pp.495~507 | number of Cited : 3

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The Effect of Ecological Restoration and Water Purification of Ecological Fish-way and Floodplain Back Wetland Created as Sustainable Structured Wetland Biotope at Maeno Stream

Chan Woo Byeon , 김용민 | 2017, 26(6) | pp.508~523 | number of Cited : 2

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Effects on Water Quality in the Development and the Comparative Analysis of Water Quality Results in Post-environmental Impact Investigation - Focused on a Quarry Mine and Sports Facilities -

Seyong, Lee , Young-hee Roh , Hanna Cho and 1 other persons | 2017, 26(6) | pp.524~537 | number of Cited : 0

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Mercury Concentrations of Black-tailed Gull Eggs Depending on the Egg-Laying Order for Marine Environmental Monitoring

이장호 , Lee,Jong-Chun , 장희연 and 4 other persons | 2017, 26(6) | pp.538~552 | number of Cited : 2

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Evaluation of Internal Phosphorus Loading through the Dynamic Monitoring of Dissolved Oxygen in a Shallow Reservoir

Park, Hyung Seok , Sunhwa Choi , Chung, Se-woong and 3 other persons | 2017, 26(6) | pp.553~562 | number of Cited : 3

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In these days, agricultural reservoirs are considered as a useful resource for recreational purposes, tour and cultural amenity for vicinity communities as well as irrigation water supply. However, many of the agricultural reservoirs are showing a eutrophic or hyper-eutrophic state and high level of organic contamination. In particular, about 44.7% of the aged agricultural reservoirs that constructed before 1945 exceed the water quality criteria for irrigational water use. In addition to external loading, internal nutrient loading from bottom sediment may play an important role in the nutrient budget of the aged reservoirs. The objectives of this study were to characterize variations of thermal structure of a shallow M reservoir (mean depth 1.7 m) and examine the potential of internal nutrient loading by continuous monitoring of vertical water temperature and dissolved oxygen (DO) concentration profiles in 2015 and 2016. The effect of internal loading on the total loading of the reservoir was evaluated by mass balance analysis. Results showed that a weak thermal stratification and a strong DO stratification were developed in the shallow M Reservoir. And, dynamic temporal variation in DO was observed at the bottom of the reservoir. Persistent hypoxic conditions (DO concentrations less than 2 mg/L) were established for 87 days and 98 days in 2015 and 2016, respectively, during the no-rainy summer periods. The DO concentrations intermittently increased during several events of atmospheric temperature drop and rainfall. According to the mass balance analysis, the amount of internal PO4-P loading from sediment to the overlying water were 37.9% and 39.7% of total loading during no-rainy season in 2015 and 2016, respectively on August when algae growth is enhanced with increasing water temperature. Consequently, supply of DO to the lower layer of the reservoir could be effective countermeasure to reduce nutrient release under the condition of persistent DO depletion in the bottom of the reservoir.

Studies on Expanding Application for the Recycling of Coal Ash in Domestic

Hanna Cho , 맹준호 , 김은영 | 2017, 26(6) | pp.563~573 | number of Cited : 9

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Coal ash is generated from coal-fired thermal power plants every year. The remaining quantity of coal ash ends up in the landfills except for the recycled portion, and the existing ash pond capacity is limited almost. Currently, the difficulties are faced in building a new ash treatment plant because of the concerns about the environmental impacts of landfills at individual plant facilities. In terms of minimizing the environmental impact, the recycling and effective uses of coal ash are recognized as urgent issues to be challenged. Accordingly, this study examines the obstacles in expanding the recycling of the coal ash in South Korea and proposes solutions based on the casestudy analysis. The analysis results are as follows: 1) specific recycling guidelines and standards are required to be established in accordance with the contact medium (soil, ground water, surface water and sea water) and the chemical. 2) by providing the recognition environmentally safe in recycling the coal ash, transparency in establishing the planning stages and active communication with the community through promotion and research are essentially needed. 3) practical support system is required to encourage the power plant companies to use the coal ash as beneficial use.study analysis. The analysis results are as follows: 1) specific recycling guidelines and standards are required to be established in accordance with the contact medium (soil, ground water, surface water and sea water) and the chemical. 2) by providing the recognition environmentally safe in recycling the coal ash, transparency in establishing the planning stages and active communication with the community through promotion and research are essentially needed. 3) practical support system is required to encourage the power plant companies to use the coal ash as beneficial use.

KJCKorea
Journal Central

Journal of Environmental Impact Assessment 2023 KCI Impact Factor : 0.51

2017, Vol.26, No.6