Korean | English

pISSN : 1225-7184

2020 KCI Impact Factor : 0.51
Home > Explore Content > All Issues > Article List

2017, Vol.26, No.1

  • 1.

    Biological Characteristics and Current Status of Nutria (Myocastor coypus) Introduced in Jeju Island

    김가람 | Oh, Hong Sik | 2017, 26(1) | pp.1~10 | number of Cited : 3
    Abstract PDF
    The study was carried out to understand the inhabiting status and biological features of nutria (Myocastor coypus) in the Jeju Island from May, 2013 to August, 2016. Five individuals were captured by traps and two individuals were collected in dead. Of the 7 individuals, those whose bio-information could not be known were excluded to perform autopsy of the rest of them. The results from morphological, cranial and anatomical analyses, it was found that the females achieved sexual maturation but had no breeding experience. An adult male showed similar sizes to those found in the Korean Peninsula. After collecting the 7 individuals in 2013, 1 nutria individual was filmed by the scouting camera in May, 2014 but not captured. The long-term investigation of the research area found no inhibiting individual. It is deemed the nutria was either died of natural death or migrated. In order to establish a proper nutria control, the environmental characteristics of Jeju Island should be considered where indigenous and introduced species coexist in a limited space. Our findings will provide helpful information for understanding biological features of nutria and planning protection program of natural ecosystems of Jeju Island.
  • 2.

    Study on the improvement of prediction model for the railway environmental noise using ISO 9613-2

    Seungho Jang | Hyoin Koh | Jiyoung Hong | 2017, 26(1) | pp.11~26 | number of Cited : 1
    Abstract PDF
    Approximate empirical equations obtained by measuring overall noise levels at different distances have been used to evaluate environmental influence of the railway noise though the accurate prediction of noise levels is important. In this paper, a noise prediction model considering the frequency characteristics of noise sources and propagation was suggested to improve the accuracy of noise prediction. The railway noise source was assorted into track, wheel, traction and aerodynamic components and they were characterized with the source strength and speed coefficient at each octave-band frequency. Correction terms for the acoustic roughness and the track/bridge condition were introduced. The sound attenuation from a source to a receiver was calculated taking account of the geometrical divergence, atmospheric absorption, ground effect, diffraction at obstacles and directivity of source by applying ISO 9613-2. For obtaining the source strength and speed coefficients, the results of rolling noise model, numerical analysis and measurements of pass-by noise were analyzed. We compared the predicted and measured noise levels in various vehicles and tracks, and verified the accuracy of the present model. It is found that the present model gives less error than the conventional one, so that it can be applied to make the accurate prediction of railway noise effect and establish its countermeasures efficiently.
  • 3.

    Preliminary Environmental Impact Assessments on Fish Compositions and the Ecological Health of Jeokbyeok River on the Road Construction of Muju-Geumsan Region

    Sang-Jae Lee | 박희성 | Kwang Guk An | 2017, 26(1) | pp.27~43 | number of Cited : 4
    Abstract PDF
    The objectives of the study were to evaluate fish compositions, endangered species, community structure, physical habitat, and general water quality for a preliminary environmental impact assessment of Jeokbyeok River on the road construction between two regions. Total number of species and total number of individuals, based on CPUE, were 23 and 1186, respectively. The endangered species (I, II) as the legal protection species were Pseudopungtungia nigra (79 samples) Gobiobotia brevibarba) (5) Gobiobotia macrocephala (2), indicating a requiring of endangered species conservation. In the meantime, exotic species and ecological disturbing species such as Micropterus salmoides and Lepomis macrochirus, were not present, indicating a well conserved area. According to fish community analysis, values of species diversity index were high (range: 0.788 - 1.030), and the dominance index were low (range: 0.097 - 0.183), indicating that the fish community in this area was maintained well without high dominacne by specific species. Also, fish analysis on tolerance guilds and trophic guilds showed that the proportions of sensitive species were largely exceeded the proportions of the tolerant species, while the proportions of insectivore species were largely exceeded the proportions of the omnivore species. This outcome suggests that the ecosystem was well maintained in terms of tolerance and trophic compositions (food chain). Ecological health, based on the multi-metric fish model of Fish Assessment Integrity (FAI), reflected those fish conditions. In other words, values of FAI model averaged 82.4, which means a “good condition” in the criteria of ecological health by the Minstry of Environment, Korea. In addition, general water quality and physical habitat analyses showed that the system was in good condition. Under these conditions, if the road constructions between the two regions happen in the future, inorganic suspended solids may increase in the waterbody, and this may result in indirect or direct influences on the physical habitats and food chain as well as fish compositions, so the ecological protections and prevention strategy from the soil erosion are required in the system.
  • 4.

    Land Use Optimization using Genetic Algorithms - Focused on Yangpyeong-eup -

    박윤선 | Lee, Dong Kun | Yoon Eun Joo and 1other persons | 2017, 26(1) | pp.44~56 | number of Cited : 2
    Abstract PDF
    Sustainable development is important because the ultimate objective is efficient development combining the economic, social, and environmental aspects of urban conservation. Despite Korea’s rapid urbanization and economic development, the distribution of resources is inefficient, and land-use is not an exception. Land use distribution is difficult, as it requires considering a variety of purposes, whose solutions lie in a multipurpose optimization process. In this study, Yangpyeong-eup, Yangpyeong, Gyeonggi-do, is selected, as the site has ecological balance, is well-preserved, and has the potential to support population increases. Further, we have used the genetic algorithm method, as it helps to evolve solutions for complex spatial problems such as planning and distribution of land use. This study applies change to the way of mutation. With four goals and restrictions of area, spatial objectives, minimizing land use conversion, ecological conservation, maximizing economic profit, restricting area to a specific land use, and setting a fixed area, we developed an optimal planning map. No urban areas at the site needed preservation and the high urban area growth rate coincided with the optimization of purpose and maximization of economic profit. When the minimum point of the fitness score is the convergence point, we found optimization occurred approximately at 1500 generations. The results of this study can support planning at Yangpyeong-eup.ausative relationship between the perception of improving odor regulation and odor acceptance.
  • 5.

    A study on the application of River Monitoring Activities for Residents Participatory Watershed Management - Focusing on the Musim River Basins -

    Lee Eun Jeong | 2017, 26(1) | pp.57~67 | number of Cited : 0
    Abstract PDF
    Recently, Looking at the watershed management policy in Korea, It is preparing to manage sub-watershed and tributary from the government-led mainstream management, such as the selection of algae focused management tributary, application of tributary-TMDLs. At this point, this study is attempted to propose the residents participatory watershed management methods that is possible daily, voluntary and customized management in the sub-watershed. As a results, through this study, we found out the importance of sub-watershed unit based watershed management because of the pollutants in blind spot. It is the prerequisite for watershed management to arrange practicable bottom-up approach that these investigated contents can be reflected in the various planning.
  • 6.

    A Study of Nonpoint Source Pollutants Loads in Each Watershed of Nakdong River Basin with HSPF

    권광우 | Choi, Kyoung-sik | 2017, 26(1) | pp.68~77 | number of Cited : 3
    Abstract PDF
    In order to estimate the non-point pollution loads from each watersheds among 209 watersheds, the calibration and validation of HSPF model were carried out based on 2012 in 2013 years. In the case of flow rate, R2 of calibration and validation were 0.71~0.93 and 0.71~0.79, which were relatively good values. With the respect to calibration of water quality, % differences between measured and simulated values were 0.4 ~ 9.7 of DO, BOD 0.5 ~ 30.2% and TN 1.9~28.6% except for Hwhangkang B site. In case of validation, DO was 0.2 ~ 13.7%, BOD 1.3~23% and TN 0.5~24.3% excluding Hwhangkang B. However, since the concentration of TP was very small compared with other items, the range of difference was large as 0.8~55.3%. level. As the result of calculating annual accumulative BOD loads for each watershed, it was found that RCH 123 (Uryeong, Gyeongsangnamdo), RCH 121 (Jinju, Gyeongsangnamdo) and RCH 92 (Daegu) were the high ranked. The unit watersheds including various landuse type susch as forest and agricultural sites in mainstream areas have a higher BOD nonpoint pollution load than those in dam regions. However, the results of the annual cumulative loading of the basins for nutrients did not appear to be consistent with the BOD annual cumulative loading ranks. Other factors that represent watershed characteristics such as landslope and soiltypes, including landuse pattern, have been found to be closely related to nonpoint pollutant loads
  • 7.

    A Study on Environmental Impact Assessment Guidelines for Marine Environments in Construction Projects of Thermal Power Plant

    Jun-Ho Maeng | 김은영 | 강태순 and 1other persons | 2017, 26(1) | pp.78~93 | number of Cited : 3
    Abstract PDF
    Environmental impact assessment(EIA) on the construction and operation of thermal power plant(TPP) is aimed at promoting sustainable coastal development by clearly identifying the marine physics and organisms effects of the project on the surrounding marine environment and minimizing its impact. The primary purpose of this study is to establish EIA guidelines for TPP in order to assess how TPP construction projects influence marine environment and to establish the mitigaion plans of environmental impacts. Through this study, scientific and efficient EIA guidelines for the marine environments were established by a specialist forum consisted of officials from the Ministry of Environment and the Ministry of Trade, Industry and Energy, personnel from five public corporations in charge of TPPs and marine environment experts. In the study, fifteen EIA reports (2009~2015) on TPPs submitted were analyzed to identify the shortcomings of current assessment items on marine environment and to collect a wide range of information including EIA report formulation regulations, domestic and overseas environmental survey guidelines and EIA review comments on TPPs. Based on the findings, a specialist forum put together EIA guidelines for TPP construction projects.