• 환경생물
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• 제22권2호
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• pp.279-286
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• 2004

본 연구는 토지피복현황과 수림의 층위구조 등이 다양한 도시녹지를 대상으로 미기상 조절에 미치는 영향을 정성 및 정량적으로 파악하기 위해 녹지내의 기온 및 습도를 관측하였다. 그 데이터를 바탕으로 녹지내의 토지피복 현황과 그 비율, 녹적량과 기온 및 습도와의 관련성을 회귀분석 등에 의해 해석하였다. 그 결과 고온역은 포장면과 나지 주변에서, 저온역은 수림지 및 수면 주변에서 형성되었다. 또한, 수림(교목+소교목)으로 둘러싸인 수면, 소하천 주변에도 저온을 나타냈다. 습도는 기온분포에 거의 대응하는 형태로 고온역이 저습역이고, 저온역이 고습역으로 나타났다. 녹지가 미기상조절효과를 갖는 메커니즘은 토지피복비율의 종류,그 비율의 차이에 따라 미기상조절효과의 정도가 서로 달랐다. 더욱이 각 녹적량의 증가는 수고에 관계없이 모두 기온은 떨어뜨리고 습도는 상승시키는 효과를 보였다. 그 효과의 효율은 교목, 소교목, 관목의 순이다. 지금까지의 실증결과로부터 고온완화에는 수림지, 수면,초지의 순으로, 그 비율을 증가해서 배치하면 효과가 커지고, 같은 방법으로 습도의 상승에는 수면, 수림지, 초지의 순으로 그 비율을 증가해서 배치하면 효과가 높아진다. 그 효율성을 고려하면 수면, 소하천을 핵으로 그 주변은 교목 중심의 수림이 좋고, 그 층위구조는 단층림보다는 2∼3층의 혼효림이 미기상조절에 미치는 효과가 크다.

• Advances in environmental research
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• 제10권1호
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• pp.1-15
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• 2021

Rising urban flood patterns are a universal phenomenon and a significant challenge for city government and urban planners worldwide. Urban flood problems range from relatively localized incidents to substantial incidents, which lead to cities being flooded for a few hours to several days. Therefore, the effect may be widespread, such as the temporary displacement of individuals, disruption to civic facilities, water quality degradation and the possibility of epidemics. The problems raised by urban flooding are highly challengeable and compound by ongoing climate change, with adverse implications for changes in rainfall and gaps in intra-urban rainfall distribution. Unplanned construction and invasions of large houses along rivers and watercourses have interfered in natural rivers and watercourses. As a result, the runoff has risen in proportion to the urbanization of the urban floods. The location of the relief camp and the priority for evacuation were determined, and the safest route to avoid floods were established. This method can be used for emergency planning in future flood incidents, and it will help plan disaster preparedness for Panchayat. This study will promote the flood plain's potential use for disaster management and land use planning virtually.

• 전기학회논문지
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• 제61권7호
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• pp.957-965
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• 2012

Korean government has been preparing the introduction of Emission Trading as part of the framework convention on Climate Change as a relief of negative downstream effect over electricity industry. This paper develops a mathematical model amenable to analyzing the economic impact of introduced emission trading system on the national generation expansion planning. The developed model was also employed with a case study to verify its applicability.

• 한국농공학회논문집
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• 제59권3호
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• pp.29-39
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• 2017

In this study, the GPM (Global Precipitation Mission) IMERG (Integrated Multi-satellitE retrievals for GPM) rainfall data was verified and evaluated using ground AWS (Automated Weather Station) and radar in order to investigate the availability of GPM IMERG rainfall data. The SPI (Standardized Precipitation Index) was calculated based on the GPM IMERG data and also compared with the results obtained from the ground observation data for the Hoengseong Dam and Yongdam Dam areas. For the radar data, 1.5 km CAPPI rainfall data with a resolution of 10 km and 30 minutes was generated by applying the Z-R relationship ($Z=200R^{1.6}$) and used for accuracy verification. In order to calculate the SPI, PERSIANN_CDR and TRMM 3B42 were used for the period prior to the GPM IMERG data availability range. As a result of latency verification, it was confirmed that the performance is relatively higher than that of the early run mode in the late run mode. The GPM IMERG rainfall data has a high accuracy for 20 mm/h or more rainfall as a result of the comparison with the ground rainfall data. The analysis of the time scale of the SPI based on GPM IMERG and changes in normal annual precipitation adequately showed the effect of short term rainfall cases on local drought relief. In addition, the correlation coefficient and the determination coefficient were 0.83, 0.914, 0.689 and 0.835, respectively, between the SPI based GPM IMERG and the ground observation data. Therefore, it can be used as a predictive factor through the time series prediction model. We confirmed the hydrological utilization and the possibility of real time drought monitoring using SPI based on GPM IMERG rainfall, even though results presented in this study were limited to some rainfall cases.

• 한국농림기상학회지
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• 제23권4호
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• pp.283-294
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• 2021

경사면일사량은 수평면일사량과 해당위치 지형경사도 간의 기하학적 관계인 일사수광비율을 통해 추정할 수 있다. 그러나 이렇게 추정한 일사량은 주변에 햇빛을 차단하는 장애물이 없다는 것을 가정하기 때문에 만약 실제 농사를 짓고 있는 농장 등에 이를 적용할 경우에 지형으로 인한 차광 등의 영향을 충분히 반영하지 못한다. 음영기복도는 태양의 위치와 지형의 기복으로 인한 직달일사의 변이를 밝기(휘도)로 수치화한 격자 형태의 자료로서, 하나의 격자는 가장 어두운 값 0에서 가장 밝은 값 255까지의 값을 갖는다. 본 연구에서는 지형으로 인한 차광효과를 모의하기 위해 30m 해상도의 DEM을 이용하여 연구지역의 음영기복도를 제작하고 휘도 분석을 수행하였다. 연구지역에 설치된 AWS 22개 지점의 기상자료를 수집하여 일조율 80% 이상인 날을 선별하고, 관측일사량과 각 지점의 휘도를 비교하여 휘도가 지형으로 인한 차광효과를 설명할 수 있는지 확인하였다. 분석결과 휘도와 일사량 간에 상관관계가 있는 것을 확인하였으며, 지형의 영향이 큰 지점에서의 직달일사가 시작되는 시점과 끝나는 시점은 태양고도 보다는 휘도와 잘 부합하는 것으로 나타났다. 추가적인 연구를 통해 주변 지형의 영향을 반영한 휘도를 이용한 상세한 일사량 추정이 가능할 것으로 기대된다.

• 한국지구과학회지
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• 제30권5호
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• pp.622-629
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• 2009

This study intended to collect data for evaluating the meteorological value of Upo Wetland which is the largest wetland in the downstream of Nakdong River. The observations were conducted in summer at the Upo Wetland and its surrounding paddy field that is the converted areas from a wetland to a paddy field. The following results are obtained: 1) The temperature of Upo Wetland area was $1^{\circ}C$ lower than the surrounding area during the day while it was a little higher during the night.; 2) The maximum wind speed in the Upo Wetland area was 3.5 m/s which is stronger than 1.6 m/s of its surrounding area. The south wind was observed in the farmland for most of the day while north winds and south winds alternated between day and night in Upo Wetland.; 3) In heat budget analysis, Upo Wetland was wasted in the form of latent heat rather than sensible heat in daytime.

• 한국농공학회지
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• 제19권3호
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• pp.4449-4461
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• 1977

Subsurface Drinage Problems arise from many causes. Flatland tends to be poorly drained, particularly where the subsoil permeability is low. There are many wet areas, however, where there is no evident connection between the area of seepage, or a high water table, and the topography of the site. High water tables may occur where the soil is either slowly or rapidly permeable, where the climate is either humid or arid, and where the land is either sloping or flat. This study is to bring light on subjects relating to increasing yield of crop and possibility of double crops a year in water logging paddy fields. Obtained results are briefly summarized as follows: 1. Effect of crop-yield in the plot A resulted 20.2 percent higher than the ordinary plot with yield of brown rice. 2. Possibility of double-crops a year is investigated. Effect of the barley production of the test plot resulted 168.2 percent higher than the other uplands near test plot with the yield of 1977 production and it is 3.8 percent higher compare with the yearly yields. 3. Decreasing depth of water level was measured 23.9mm per day and 14.3mm per day at the test plot and ordinary plot respectively and the amounts of subsurface drainage measured 30mm to 35mm per day. It is required that the relief well should be controled carefully and adequately. 4. Mean depth of ground water levl was measured 0.4∼0.5m regardless the width of corrugated pipe. It is significantly lowere than the ordinary plot(0.15∼0.20m) 5. The ground temperature of the test plot is higher 1 degree of centigarade or more than the ordinary plot and soil moisture content of the ordinary plot is higher 12.4∼27.8 percent than the plot reversely. There should be a relationship between rising of ground temperature and soil moisture.

• 한국의사학회지
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• 제19권2호
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• pp.29-47
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• 2006

Because the size of population was directly related to the power of the nation in the Chosun Dynasty, various efforts were exerted to maintain the size stable and the keys to the efforts were a high birth rate and a low death rate. However, in addition to wars, epidemic diseases had an enormous effect on the death rate. Particularly during the mid Chosun Dynasty, epidemic diseases were more prevalent than ever due to the abnormal climate called the little ice age. To cope with them, the government executed several medical relief policies and published medical books. In Chinese epidemiology, infectious diseases mean sicknesses caused by hot weather, but in Korean epidemiology, they indicate large-scale infectious sicknesses caused by both hot and cold weather. Therefore, as treatment methods for diseases from the cold were not applicable to the pathology of epidemic diseases, China developed separate epidemiology. In Korea, however, the main concern was how to prevent epidemic diseases, whether from hot or cold weather, that drove many lives into death. The characteristics of Korean epidemiology are as follows. First, whenever epidemic diseases were prevalent, in order to cope with them, translated medical books were promptly published including Ganibyeokonbang, Bunmunonyeokihaebang, Sinchanbyeokonbang, Byeokyeoksinbang and Byeokonsinbang. Second, those books were annotated in Korean so that people could read easily and accurately. Third, as an extension of the Hyangyak movement from the late Koryo Dynasty, Danbang was used a lot to treat and prevent epidemic diseases with less financial burden, and things obtainable easily according to individuals' situation were mentioned for anybody to overcome the emergent situation of epidemic diseases. Fourth, methods for praying to God were suggested for practitioners to work with sincere spirit and to keep themselves from epidemic diseases.