• Title/Summary/Keyword: Jeiu Island

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Hydraulic Watershed Classification and Analysis of Flow Characteristics of Groundwater on Jeju Island (제주도 지하수 유역의 적절성 평가와 수리학적 유역설정)

  • Kim, Min-Chul;Yang, Sung-Kee
    • Journal of Environmental Science International
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    • v.28 no.4
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    • pp.423-433
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    • 2019
  • This study was carried out to identify the problems of the underground watersheds on Jeju Island, and to establish the hydraulic groundwater basin to be used as basis for the analysis of the groundwater model. In order to evaluate the adequacy of the groundwater basin on Jeju Island, a correlation analysis between elevation and groundwater level was conducted using data from 125 observation wells. The analysis, conducted with an elevation step of 100 m, exhibited values of R2 in the range 0.1653-0.8011. No clear correlation was observed between elevation and groundwater level. In particular, the eastern and western areas showed an inverse proportionality between elevation and groundwater level. The Kriging technique was used to analyze the underground water level data and to define the equipotential lines for all areas of Jeju Island. Eight groundwater watersheds were delineated by considering the direction of groundwater flow, the positions of the observation wells, and the long and short axes of the watersheds.

A two-dimensional inversion of MT and AMT data from mid-mountain area of Jeiu island (제주도 중산간 지역 MT 및 AMT 탐사자료의 2차원 역산)

  • Lee, Tae-Jong;Song, Yoon-ho;Uchida,Toshihiro;Park, In-Wha;Lim, Sung-Keun
    • 한국지구물리탐사학회:학술대회논문집
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    • 2005.05a
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    • pp.21-26
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    • 2005
  • Two-dimensional (2-D) inversion of magnetotelluric (MT) data for two survey lines having south-north direction from Jeiu Island has been carried out. The 2-D models show a thick layer having around 10 ohm-m in the depth of a few hundred meters throughout the survey area, which can be considered as the unconsolidated sedimentary layer. And they also show a conductive anomaly at the central part of each survey lines. But unfortunately by now, we do not have any further information about the anomaly. Comparison of the 2-D inversion model using MT band only and that using both AMT and MT bands said that it is helpful for us to include AMT band as well as MT band in the inversion to interpret not only the shallow part but also the deep structures.

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Atmospheric Nitrate, sulfate, Ammonium, and Calcium Concentrations at Forest Area in Jeiu Island (제주도 산림지역에서의 대기중 Nitrate, Sulfate, Ammonium, Calcium 농도 분석)

  • 김대준;강창희;허철구;이기호
    • Proceedings of the Korea Air Pollution Research Association Conference
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    • 2003.11a
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    • pp.151-152
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    • 2003
  • 대기중에는 토양입자나 해양입자와 같이 직접적으로 방출되는 입자상 물질 이외에 자연적으로 생성되거나 인간의 활동에 의하여 배출되는 유황, 질소산화물 및 유기물의 가스상 물질이 대기 화학 반응에 의하여 입자상 물질로 변환된 이차입자가 혼재되어 있다. 이러한 입자상물질은 $K^{+}$, $Na^{+}$, $Mg^{2+}$, NH$_4$$^{+}$, $Ca^{2+}$ 등의 양이온과 Cl$^{-}$, NO$_3$$^{-}$, SO$_4$$^{2-}$ 등의 음이온 성분으로 구성되어 있다. (중략)

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Molecular fingerprinting of olive flounder pathogenic Streptococcus parauberis strains by random amplified polymorphic DNA analysis

  • Jung, Yong-Uk;Kang, Sang-Hyuck;Jin, Chang-Nam;Kang, Bong-Jo;Heo, Moon-Soo
    • 한국생물공학회:학술대회논문집
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    • 2005.10a
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    • pp.899-903
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    • 2005
  • Two infectious species of Streptococcosis pathogens were detected by multiplex PCR assay. Detection rates of Streptococcus iniae and S. parauberis could reach 44.9% and 55.1% respectively for one year during 2004 to 2005 in Jeju island. These findings showed that S. parauberis strains were important pathogen with streptococcosis of olive flounder in Jeju island. These findings showed that S. parauberis strains were important pathogen with streptococcosis of olive flounder in Jeiu island. In the present study we have investigated the interspecific relationship of all Jeju area of S. parauberis by RAPD analysis. Represent strains divided to four groups by RAPD fingerprints. The important differences observed between the olive flounder isolates suggest that they could constitute a well-differentiated group or a separate clonal line within this bacterial species. Though, serological research of S. parauberis strains in Jeju island not exist yet. These strains doing the serological evolution.

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Analysis of Groundwater Flow Characterstics and Hydraulic Conductivity in Jeju Island Using Groundwater Model (지하수 모델을 이용한 제주도 지하수 유동특성 및 수리전도도 분석)

  • Kim, Min-Chul;Yang, Sung-Kee
    • Journal of Environmental Science International
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    • v.28 no.12
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    • pp.1157-1169
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    • 2019
  • We used numerical models to reliably analyze the groundwater flow and hydraulic conductivity on Jeju Island. To increase reliability, improvements were made to model application factors such as hydraulic watershed classification, groundwater recharge calculation by precipitation, hydraulic conduction calculation using the pilot point method, and expansion of the observed groundwater level. Analysis of groundwater flow showed that the model-calculated water level was similar to the observed value. However, the Seogwi and West Jeju watersheds showed large differences in groundwater level. These areas need to be analyzed by segmenting the distribution of the hydraulic conductivity. Analyzing the groundwater flow in a sub watershed showed that groundwater flow was similar to values from equipotential lines; therefore, the reliability of the analysis results could be improved. Estimation of hydraulic conductivity distribution according to the results of the groundwater flow simulation for all areas of Jeju Island showed hydraulic conductivity > 100 m/d in the coastal area and 1 - 45 m/d in the upstream area. Notably, hydraulic conductivity was 500 m/d or above in the lowlands of the eastern area, and it was relatively high in some northern and southern areas. Such characteristics were found to be related to distribution of the equipotential lines and type of groundwater occurrence.

A Study of the Ondol (Gudul, Floor Heating System) and Kitchen Space in the Traditional Houses on Jeju Island, Korea

  • Kim, Bong-Ae;Lee, Jeong-Lim
    • International Journal of Human Ecology
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    • v.4 no.1
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    • pp.15-23
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    • 2003
  • Jeju-do is a volcanic island located off the shore of the Korean peninsula facing the Pacific Ocean. The traditional housing styles of the Jeju Province, therefore, reflect the impact of these natural backgrounds and reveal different housing styles that are distinctive from those of mainland Korea. The purpose of this research is to analyze the peculiarities of the Ondol (floor heating system) and the kitchen space of traditional housing of Jeju Island in terms of lifestyles. This study shall employ two research methods: a literature review and field survey methods. The literature review shall focus on the observations of characteristics noted in previous studies of Jeju's private houses. The field survey shall employ field survey and interview methods originating from the ethnography of the culturological-anthropologist approach. (1) The Jeju-do Ondol system is a “Weibang-eudul” system which means one Gudul per fire hole. (2) The definition of terms for Gulmook show variations depending on the various regions on Jeiu-do. (3) Major facilities in Jeongji include Gulmook, Sotduck, and Busup. Gulmook is a heating facility and Sotduck refers to a cooking facility; Busup refers to a combination of heating, cooking, and illuminating facilities.

A Study on the Assessment of Operational Capacity Limit of Wind Turbine for the Frequency Stability of Jeiu Island System (제주계통 단독운전 시 주파수 안정도 유지를 위한 풍력발전 운전용량 산정 방법에 관한 연구)

  • Hwang, Kyo-Ik;Chun, Yeong-Han
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.56 no.2
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    • pp.233-239
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    • 2007
  • As the Kyoto Protocol, which aims at reducing greenhouse gases in accordance to the UNFCCC, came into force, research on environment friendly energy resources has been a matter of concern worldwide. As a general power generation system, among renewable energy resources, that is interconnected and operated with power system, the wind turbine is emerging as an effective alternative. Since power capacity of the wind turbine has been steadily increasing and its relative importance is also increasing in total facility capacity, we cannot ignore its effect. Because controlling generation output in the wind turbine is not as easy as in the synchronous machine due to its facility characteristics and it generates irregular output fluctuations when interconnected with power system, system interconnection was difficult. But the effect of large capacity wind turbine on isolated power system like Jeju island is serious problem on the frequency stability. Accordingly, it is necessary to analyze the effects of wind turbine on system interconnection and assess the optimum capacity of wind turbine that satisfies the most important principle of stable power supply. This paper have analyzed the effects of wind turbine capacity increases on the system and suggested the method of the capacity to achieve its steady operation. And It is applied to the Jeju island.

Alternating Development Strategies in Jeiu Island, Korea (제주도 발전 전략의 교호적 변화)

  • Kwon, Sang-Cheol
    • Journal of the Korean Geographical Society
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    • v.43 no.2
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    • pp.171-187
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    • 2008
  • Islands are vulnerable to outer influences due to their small size and isolation. Tourism often becomes an important development focus because of their unique culture and nature. Jeju-do, as well as other islands, has experienced such development mostly led by central government, and the regional change was understood as the outcome of global influences without much concern with the local response or strategy. Thus, vulnerability has been the key theme in island development studies. This paper examines the current state of island development as an outcome of locals' alternating strategy in which the islanders accept the central government's plan, but express their demands to modify them. It is reflected in the electoral preference for ruling or oppositional parties, local movements against central government's development plans, and the spatial organization of tourism sites from a few growth centers to more dispersed, balanced development. These suggest that the current state of island development is not derived from unidirectional global forces, even if islands are peripheral. Rather, it is the outcome of an alternating strategy of Jeju locals accepting the central government development plans while managing them for local benefits.