• Title/Summary/Keyword: 기후요소

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Relationship Between Construction Productivity and the Weather Elements in the Reinforced Concrete Structure for the High-rise Apartment Buildings (기후요소와 생산성간의 상관관계 분석에 관한 연구 - 공동주택 철근콘크리트 골조공사를 중심으로 -)

  • Kim Shin-Tae;Kim Yea-Sang;Chin Sang-yoon
    • Korean Journal of Construction Engineering and Management
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    • v.5 no.6
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    • pp.80-89
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    • 2004
  • Among the various factors influencing construction productivity, weather conditions or elements become very important factors in planning and executing construction project. It is especially true in Korea where the weather changes dramatically through few seasons. In this study, relationship between construction productivity of the reinforced concrete structure we for the high-rise apartment buildings and 5 weather elements including temperature, humidity, day time, rainfall, and wind velocity have been analyzed The results trough regression analysis showed that weather elements explain $58.8\%$ of productivity in total and temperature and day time were more important factors among them.

Insolation Modeling using Climate and Geo-Spatial Elements (기후요소와 지형 공간요소를 이용한 일사량 모델링)

  • Kim, Byung-Woo;Kang, In-Joon;Han, Ki-Bong
    • Journal of Korean Society for Geospatial Information Science
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    • v.18 no.4
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    • pp.79-86
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    • 2010
  • This research is a thing about reverse operation about the solar power for location decision and increasing efficiency of the solar power generation equipments. The purpose of this research is reverse operation about the amount of sunshine using the climate and spatial elements. Following the result of correlation analysis, the wind-speed and cloud-amount factor are excluded, because the correlation and significance coefficients are out of value. Each outcome of regression analysis using the other four climate elements, and regression analysis using spatial elements is what the amount of sunshine and the solar altitude are the most influence to the insolation-modeling. Doing the regression analysis based on the precedent result make the result that climate elements have bigger coefficient of regression than spatial elements. This outcome means the climate elements are more influence than spatial elements.

Review of Environmental Assessment for Climate Factors in Urban Planning (도시계획에서의 기후요소 평가기법에 관한 고찰)

  • Eum, Jeong-Hee
    • Journal of Environmental Policy
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    • v.11 no.1
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    • pp.27-48
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    • 2012
  • The aim of this paper is to review the environmental assessment of urban climatic factors relating to urban planning in Korea and Germany, and suggest efficient ways to consider climatic factors in the environmental assessment process for urban planning in Korea. For these purposes, current assessment systems concerning urban master plan and urban management plan in Korea were reviewed to know how urban climatic factors are assessed. Furthermore, two German cases of Strategic Environmental Assessment were investigated to know how urban climatic factors are assessed and considered in the urban and regional planning of Germany. Based on the results, efficient ways to consider climatic factors in the environmental assessment for urban planning were suggested from three aspects of factors, methods and available data for climate assessment.

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Comparisons of the Pan and Penman Evaporation Trends in South Korea (우리나라 증발접시 증발량과 Penman 증발량 추세 비교분석)

  • Rim, Chang-Soo
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.30 no.5B
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    • pp.445-458
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    • 2010
  • The effects of geographical and climatic factors on annual and monthly pan and Penman evaporation were analyzed. 52 climatological stations were selected and trend analyses were performed. Furthermore, cluster analysis and multiple linear regression analysis were performed to understand the effects of geographical and climatic factors on pan and Penman evaporation. Based on stepwise multiple linear regression analysis, annual pan evaporation is proved to be mainly controlled by urbanization as geographical factor, and annual pan evaporation is also controlled by temperature, relative humidity, wind speed, and solar radiation as climatic factor. Especially wind speed is considered to be most significant climatic factor which affects pan evaporation. Meanwhile, Penman evaporation is not affected by geographical factors but it is affected by climate factors such as temperature, relative humidity, wind speed, and solar radiation except precipitation. Furthermore, the study results show that only proximity to coast affects pan evaporation trend on July; however, geographical and climatic factors do not affect pan evaporation trends in annual basis and monthly basis (January, April, and October). On the other hand, Penman evaporation trends were not affected by geographical factors in annual and monthly basises.

Constructing the Real Time Rail Temperature Database Considering Climatic Element (기후요소를 고려한 실시간 레일온도 DB구축)

  • Bae, Hyun-Ung;Choi, Jin-Yu;Choi, Sang-Hyun;Lim, Nam-Hyoung
    • 한국방재학회:학술대회논문집
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    • pp.78.1-78.1
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    • 2010
  • 장대레일 궤도는 재료적인 불확실성 및 구조계의 기하학적 불확실성이 매우 높은 시스템으로 궤도 좌굴의 위험이 상존한다. 그러므로 궤도 환경이 열악한 혹서기 장대레일 궤도의 안정성을 합리적으로 평가하는 연구는 매우 중요하다. 궤도 좌굴에 직접적 영향을 미치는 레일온도는 현재 지역의 대표 대기온도에 따른 추정된 레일온도로 사용하고 있는 실정이지만 기후조건에 따라 레일온도가 변동되기 때문에 이를 고려하여 확률분포로써 반영하는 것이 합리적이다. 본 연구는 현장 기후요소 및 레일온도 측정 실험을 수행한 자료들을 DB화하여 혹서기 장대레일 궤도의 안정성 향상 및 신뢰성 확보에 기여하고자 한다.

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Calculation of Non-Working Days due to Weather Factors during Structural Steel Works (기후요소에 의한 철골공사 작업불가능일 산정에 관한 연구)

  • Lee, Duk-Hyung;You, Jung-Sik;You, Jae-Kil;Jung, Jae-Hun;Jung, Hee-Kyung;Yu, Jung-Ho;Kim, Chang-Duk
    • Korean Journal of Construction Engineering and Management
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    • v.7 no.4
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    • pp.137-145
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    • 2006
  • Calculating non-working days is very important element for the accurate estimation of construction time. And non-working days are largely affected by weather factors such as rainfall, wind velocity, snowfall and temperature. In the case of concrete works, there are lots of referable information for the calculation of non-working days due to the weather factors. However, for the structural steel works, there are very limited information only. Through literature survey and interviews with a few engineers, this paper established the weather factors that affect steel structural works and the impact of those factors. Based on the factors and the expected impact of the factors together with the weather data during the last 15 years in Seoul region gathered from Korea Meteorological Administration, this paper suggests the monthly non-working day of structural steel work due to weather factors. This information can be used for the early estimation of construction time.

Investigation on the Temperature Characteristics of CWR for the Climate Change (기후변화에 대비한 장대레일 온도특성 연구)

  • Choi, Jin-Yu;Lee, Gyu-Sei;Bae, Hyun-Ung;Park, Beom-Ho;Lim, Nam-Hyoung
    • Journal of the Korean Society for Railway
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    • v.13 no.2
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    • pp.179-185
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    • 2010
  • In order to secure safety for the buckling and fracture of continuous welded rail and improve the efficiency of maintenance work, it is very important that grasp the characteristics of rail temperature. Recently, the maximum air temperature in summer season rises gradually and the minimum air temperature in winter season is decreasing gradually due to the climate change. Therefore, these phenomenon influences in the change amount of yearly rail temperature and can cause change of laying and maintenance temperature. In this study, actual measurement of rail temperature including climatic factors is carried out by constructing the temperature and climate measurement system as realistic as possible. Through the intensive investigation of actual data, it is founded that the existing prediction formulas for rail temperature may be used only in certain climatic conditions (certain combination of climatic factors). It may be more reasonable that the rail temperature considering actual climatic factors in site is predicted on probabilistic approach.

A Phytoclimatic Review of Warm-temperate Vegetation Zone of Korea (한국 난온대 식생분포대의 식물기후학적 재검토)

  • Eom, Byeongcheol;Kim, Jong-Won
    • Korean Journal of Ecology and Environment
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    • v.53 no.2
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    • pp.195-207
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    • 2020
  • In Korea, specific thermal elements such as annual mean temperature (AMT) 13℃, 14℃, and Kira's coldness index (CI) -10℃, have been suggested about the northernmost distribution of the warm-temperate evergreen broad-leaved forest zone. We reviewed the relationship between three thermal elements and the actual distribution of evergreen broad-leaved woody plants or its communities. Thiessen and Kriging method using point-data calibrated by seasonal lapse rate according to altitude were utilized for the spatial distribution pattern analysis. Several phytoclimatic maps were also produced in order to compare different thermal values. We identified that the AMT 13℃ was the best thermal element to demarcate the northern limit of the warm-temperate forest zone. Its area was estimated ca. 20,334 ㎢ and larger than those of other thermal elements. We concluded that an indirectly fabricated index i.e. CI -10℃ is useless and it was enough for a direct value of AMT 13℃ to represent the northern-limit distribution of warm-temperate forest zone, at least in Korea. Further researches on the reciprocity between floristic regions and phytoclimate zones are raised.

Analysis of Watershed Hydrologic Responses using Hydrologic Index (수문지수를 이용한 유역의 수문반응 분석)

  • Park, Yoonkyung;Kim, Sangdan
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.34 no.3
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    • pp.785-794
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    • 2014
  • Hydrologic responses in watershed are determined by complex interactions among climate, land use, soil and vegetation. In order to effectively investigate hydrologic response in watershed, one needs to analyze the characteristics of climate as well as other factors. In this study, the relative contribution of climate factors and watershed characteristics on hydrologic response is investigated by using hydrologic indexes such as the aridity index and the Horton index. From preliminary analysis, it is shown that the Horton index is proper in terms of classifying hydrologic responses in main natural watersheds of south Korea. While climate and watershed characteristics both contributes to hydrologic responses, the degree contributed from each factor is changed depending on annual climatic humid conditions. In dry conditions, the climate factor is the predominant influence on hydrologic responses. However, in wet conditions, the contribution of watershed characteristics on hydrologic responses is relatively increased.

Estimation of non-working days due to weather condition using fuzzy numbers (퍼지값을 이용한 기후요소 작업불능일 산정에 관한 연구)

  • Kim, Joo-Heon;Choi, Hee-Bok;Shin, Yoon-Seok;Cho, Hun-Hee;Kang, Kyung-In
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • pp.349-352
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    • 2008
  • Weather condition is the uncontrolled factor to influence the project duration. Determining non-working days due to it incorrectly leads to often change the project duration and increase the total cost as well as causing the dispute among stakeholders. When making decision of non-working days, it is important to consider the expert's experience according to the characteristic of the site and local area. Therefore this paper presented the method to estimate non-working days due to wether condition by using fuzzy numbers reflecting expert's subjective experience.

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