• 한국환경과학회지
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• 제27권11호
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• pp.983-989
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• 2018

The real-time monitoring of surface vegetation is essential for the management of droughts, vegetation growth, and water resources. The availability of land cover maps based on remotely collected data makes the monitoring of surface vegetation easier. The vegetation index in an area is likely to be proportional to meteorological elements there such as air temperature and precipitation. This study investigated relationship between vegetation index based on Moderate Resolution Image Spectroradiometer (MODIS) and ground-measured meteorological elements at the Yongdam catchment station. To do this, 16-day averaged data were used. It was found that the vegetation index is well correlated to air temperature but poorly correlated to precipitation. The study provides some intuition and guidelines for the study of the droughts and ecologies in the future.

• 환경영향평가
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• 제21권5호
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• pp.801-811
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• 2012

For biodiversity conservation, Biological Impact Assessment is very important. The focus of the study is to enhance efficient Environment Impact Assessment(EIA) based on collecting existing information of endangered species covering the status survey, estimation of effects and reducing methods. Habitat Suitability Index(HSI) can be applicable to Ecological Impact Assessment and finding various reducing methods based on estimating effects. For this study, the EIA report of Samjang - Sanchung highway construction was chosen as an example and Prionailurus bengalensis euptilura as an endangered species was chosen to assess the ecosystem impact on road construction. Water, road, ground coverage, slope, altitude as variables of habitat were weighted and final HSI map was calculated using Arc map and Arc view. Through comparing of before and after HSI, quantitative estimating on effects was possible to minimize impact of road construction to wildlife habitat.

• 환경영향평가
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• 제16권4호
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• pp.267-275
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• 2007

In this study, relationship between the air pollution of Siheung city and the relative contribution of automobiles to the city's pollution was evaluated for the first time. Then, new air pollution exposure index was developed through simulation. Using the newly developed index, two different urban development scenarios were compared to present a sustainable urban development plan to reduce air pollution from the land utilization point of view. According to the result of this simulation, air quality of the city was found to be affected significantly by human activities. More populated area showed worse level of air quality. Any development in the city resulted in more automobile activity and deterioration of air quality. This simulation result thus explains that a rapid increase of automobiles accompanied by the land development near local roadsides in the city is the major cause of air pollution in Siheung city. In this study, if urban activities are vigorous in an area with high air pollution, people are more likely to be exposed to air pollutant under the bad environmental conditions. On the other hand, if urban activities are less vigorous in an area with high pollution or if urban activities are vigorous in an area with less pollution, the environmental condition was positive. The APEI (Air Pollution Exposure Index) was developed based on these considerations. Scenarios 1 and 2 were compared and analyzed using APEI. In result, scenario 1 is the case in which land is developed and used in an environmentally favorable manner. From this study, it was proved that the impact of air pollution on human health can be minimized with proper land use. The result form the current study can be used as the basic information to solve problems from improper land utilization and air pollution (by road traffic). It also can be utilized to evaluate air pollution level according to land use and road characteristics and to help to choose the best location of land use to comply with the road function and status.

• 한국경제지리학회지
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• 제25권1호
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• pp.171-181
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• 2022

부동산 시장 분석에 있어 기본이 되는 정량적 데이터는 부동산 가격 지수이다. OECD와 같은 국제기구에서는 국가별 부동산 가격 지수를 공표하고, 한국부동산원에서는 광역시 단위와 시군구 단위의 지수를 산출한다. 그런데 공간단위를 시군구보다 정교한 동단위, 아파트 단지 단위로 설정하는 경우, 여러 문제점을 맞이하게 된다. 대표적인 문제는 결측치이다. 공간적 범위를 좁힐수록 단위 기간에 따라 거래가 적거나 아예 존재하지 않는 경우가 존재하기에 이 경우에는 지수의 산출이 불가능한 결측치가 발생할 수 있다. 본 연구에서는 지도학습 기반의 머신러닝 기법을 활용하여 특정 범위와 기간에 거래가 존재하지 않아 발생할 수 있는 결측치를 보완하는 기법을 제안한다. 본 모형을 통해 부동산 매매 지수의 실제값이 존재하는 것들의 예측을 통해 그 정확도를 검증하고 결측치가 발생한 것들의 예측도 해 볼 수 있었다.

• 한국환경복원기술학회지
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• 제23권5호
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• pp.29-43
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• 2020

Thermal environment of city is getting worse due to severe urban heat island caused by climate change and urbanization. The cooling effect of street tree is regarded as a effective way to ameliorate the urban heat environment. The effect is largely made up of shadow formation and transpiration. This study aims to identify how the transpiration affects the discomfort index by analyzing comprehensive impact of the transpiration on the air temperature and relative humidity. The changes in the amount of transpiration, air temperature, and relative humidity were estimated for Seogyo-dong area which has a lot of floating population in Seoul, at 2 p.m. in dry day in July and August. On average, the transpiration of the street tree decreased the temperature 0.3℃ and increased the relative humidity 2.6% in an hour. As a result of these changes in temperature and humidity, the discomfort index rose mostly(0.036 on average). It was always get rise especially on the day when the discomfort index was above 80(0.05 on average). However, compared with the significant change in temperature and humidity, the variation of the discomfort index itself was very slight(up to 0.107). Therefore, the effect of transpiration by the street trees might not be effective in the planning to improve the thermal environment(especially on the day when the discomfort index is high). It is necessary to select the species of trees and planting location considering the cooling effect of shade formation synthetically.

• 청정기술
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• 제3권2호
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• pp.47-56
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• 1997

환경 문제에 대한 사회적 관심이 높아지고 정부의 환경 규제도 강화되면서 환경 오염물질을 줄이기 위한 공정개선의 필요성이 대두되고 있다. 공정 개선을 위해서는 각 공정이 환경에 미치는 영향을 나타내는 정량적인 기준이 필요하다. 본 연구에서는 물질수지식으로부터 정의되는 오염 지수(Pollution Index)를 폐기물의 질량(mass), BOD, toxicity에 따라 세 가지로 구분하여 정의하였으며, 각 Pollution Index는 최적의 대안을 결정할 때 환경영향평가에 대한 정량적인 척도를 제시할 수 있으므로 비용평가와 더불어 공정 선택의 객관적인 기준이 될 수 있다. 정의된 Pollution Index를 문헌에 보고된 세제 제조 공정에 적용하여 기존의 공정과 개선된 공정에 대하여 Pollution Index를 계산하여 각 공정이 환경에 미치는 영향을 정량적인 수치로 비교하였다.

• 환경영향평가
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• 제16권6호
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• pp.447-465
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• 2007

The purpose of this study is to assess the sustainability in 45 cities of all over Gyeongnam and Gyeongbuk using weights and assessment system developed in leading research. The materials of assessment used statistical data and spatial data were standardized for the systematic result. The assessment score was established using the normal distribution from 25 to 125 for removal of the very smallest and maximum value. According to the results, Tongyeong was assessed the highest by 82.5 score in environmental sustainability index. In economical sustainability index, Pohang, Gumi, Changwon, Yangsan were more than 79 score but Busan, Daegu, Andong were less than 70 score. Ulsan, Geoje, Yangsan were assessed higher in society-institutional sustainability index and Jinju, Munkyeong, Changnyeong were showed higher than other cities by more 79 score in quality of life(QOL)'s sustainability index. In case of integrated sustainability index, Jinju that was the highest sustainability in QOL was assessed by first city. However, Ulsan was assessed the lowest city among others. Therefore cities which have high sustainability will prepare a politic investment program for maintaining current conditions. Cities which have low sustainability will grasp closely the environmental characteristics of urban and present the improvement direction through monitoring continuously. Overall, these results can be used as tools to assess the current cities and predict the future one. It is also necessary to establish a systematic urban planning for livable and sustainable city.

• 한국환경과학회지
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• 제28권12호
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• pp.1133-1145
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• 2019

Successful launch requires state-of-the-art launch vehicle technology and constant test operations, However, the meteorological threat to the launch vehicle flight trajectory is also an important factor for launch success. Atmospheric stability above the Naro Space Center at the this time is very important, especially because the initial flight operation can determine the success of the launch. Moreover, during the flight of launch vehicle with rapid pressure and thrust into the atmosphere, convection activity in the atmosphere may create environmental conditions that cause severe weather threats such as thunderstorms. Hence, studies of atmospheric instability characteristics over the Naro Space Center are a necessary part of successful launch missions. Therefore, the main aims of this study were to (1) verify the atmospheric stability index and convection activity characteristics over the Naro Space Center using radiosonde data observed from 2007 to 2018 by the Naro Space Center, (2) analyze changes in the atmospheric stability index according to monthly and seasonal changes, and (3) assess how the calculated atmospheric stability index is related to actual thunderstorm occurrence using statistical analysis. Additionally, we aimed to investigate the atmospheric characteristics above the Naro Space Center through the distribution chart of the atmospheric stability index during summer, when convection activity is highest. Finally, we assessed the relationship between lightning occurrence and unstable atmospheric conditions, through predictability analysis performed using the lightning observation data of the Korea Meteorological Administration.

• 한국환경생태학회지
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• 제25권3호
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• pp.389-403
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• 2011

인간 활동이 생태계의 훼손과 생물다양성의 변화에 미치는 영향을 경관생태학적 측면에서 분석하고 해석하는 연구가 활발히 진행되고 있다. 본 연구는 우리나라의 35개 농촌마을을 대상으로 자연생태계의 교란정도를 알 수 있는 귀화식물분포현황을 조사하였다. 대상지에 대한 토지이용 현황도를 제작하고 이를 바탕으로 경관지수를 이용하여 경관생태학적특성을 정량화하였다. 이를 바탕으로 대상지의 경관지수와 귀화식물 분포특성의 상관관계를 분석하였다. 경관지수는 공간분석 프로그램인 FRAGSTATS를 이용하여 산출하였으며 귀화식물의 분포특성은 Urbanization Index와 Naturalization Index를 이용하였다. 연구 결과 귀화율과 패치밀도, 귀화율과 가장자리밀도, 귀화율과 면적가중평균형태지수 등이 양의 상관관계를 나타냈으며 귀화율과 핵심면적백분율, 귀화율과 평균핵심지역 등이 음의 상관관계가 있는 것으로 분석되었다.

• 자원ㆍ환경경제연구
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• 제17권1호
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• pp.121-146
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• 2008

본 연구의 목적은 OECD 국가의 환경제약을 포함한 기술효율과 생산성 상실을 추정하여 환경효율지수를 실증분석하고 국가별 지속가능 발전 정도를 비교해 보고자 함이다. 1985년부터 1999년까지의 기간 동안 OECD 20개국의 패널자료를 사용하여 쌍곡선효율척도(hyperbolic measure of productive efficiency)에 기초한 기술효율을 측정하였다. 나아가 각 국가의 환경제약으로 인한 생산성 상실률과 산출에 대한 상실정도를 계측하였다. 1985년부터 1999년 동안 OECD 각 국가들의 환경효율지수는 점차 하락하고 있는 추세를 보여준다. 일본, 독일, 프랑스 등의 국가에서 오염물 처리에 상당한 부담을 가지고 있는 것으로 나타났다. 한국은 전반적으로 환경경제효율성이 높지만 1990년대 후반에 환경효율성이 악화되었고 OECD 국가들과 비슷하게 질소산화물 처리에 대한 부담이 높았다.