환경영향평가 (Journal of Environmental Impact Assessment)

한국환경영향평가학회 (Korean Society of Environmental Impact Assessment)
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도로변 녹지 유형별 미세먼지 농도 저감 효과와 이에 대한 풍속의 영향 연구

Mitigation Effect on Airborne Particulate Matter Concentration by Roadside Green Space Type and Impact of Wind Speed

  • 최태영 (국립생태원 생태계서비스팀) ;
  • 강다인 (국립생태원 자연환경조사팀) ;
  • 차재규 (국립생태원 기후탄소연구팀)
  • 투고 : 2023.10.18
  • 심사 : 2023.12.19
  • 발행 : 2023.12.31
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초록

본 연구는 도로변에 위치한 완충녹지와 근린공원에서 미세먼지 농도와 풍속을 실측하고, 이를 도로 측 측정결과와 비교분석하여 녹지 유형별 미세먼지 농도 저감 효과와 그에 대한 풍속의 영향을 파악하고자 하였다. 분석결과 도로변 녹지 유형에 따라 미세먼지 농도 저감 효과가 달랐고, 풍속의 증가는 미세먼지 농도 감소에 유의한 영향을 주었다. 식재밀도가 높은 완충녹지에서는 풍속이 낮고 내부에 미세먼지가 정체되어 미세먼지 농도가 가장 높았다. 반면 식재밀도가 상대적으로 낮은 근린공원 내 녹지지역은 풍속이 높고 미세먼지 농도가 가장 낮았다. 근린공원 내 비녹지지역은 가장 높은 풍속을 기록하여 미세먼지 확산에 유리하였으나 녹지지역보다 미세먼지 농도가 높았다. 따라서 도로변 녹지 내 미세먼지 농도 감소를 위해서는 바람 흐름이 원활한 녹지를 조성해야 하며, 높은 풍속과 수목의 저감 기능의 복합적인 작용이 미세먼지 농도 감소에 더 유리한 것으로 판단되었다. 녹지는 내부에 미세먼지를 포착·제거하여 외부 미세먼지 농도 감소에 기여한다. 도시 전체 및 도로 미세먼지 관리를 위해서는 완충녹지와 같은 도로변 녹지에서 식재밀도나 엽면적 등을 높여 미세먼지가 녹지 내에서 제거될 수 있도록 유도해야 한다. 그러나 도시민의 이용이 활발한 근린공원과 같은 녹지에서는 내부 미세먼지가 외부로 확산이 잘 될 수 있는 구조의 녹지를 조성하여 미세먼지로 인한 이용자의 피해를 최소화하는 것이 바람직하다.

This study measured PM10 concentrations and wind speeds in buffer green spaces and neighborhood parks located along the road, and compared them with roadside measurementresults to understand the effect of mitigating PM10 concentrations by type of green space and the influence of wind speeds on it. As a result of the analysis, the effect of mitigating PM10 concentration was different depending on the type of roadside green space, and an increase in wind speed had a significant effect on reducing PM10 concentration. In buffer green areas with high planting density, wind speed was low and PM10 stagnated inside, resulting in the highest concentration. On the other hand, green areas in neighborhood parks with relatively low planting density had high wind speeds and the lowest PM10 concentration. The non-green area within the neighborhood park recorded the highest wind speed, which was advantageous for the spread of PM10, but the concentration was higherthan that of the green area. Therefore, in orderto reduce PM10 concentration in roadside green space, it is necessary to create green space with good ventilation, and the combined effect of green space and wind speed seems to be more advantageous in reducing PM10 concentration. Green spaces capture and remove PM inside, contributing to reducing the concentration of PM outside. In order to manage PM in the entire city and on roads, it is necessary to increase planting density and leaf area in roadside green spaces, such as buffer green spaces, so that PM can be removed within the green spaces. However, in green spaces such as neighborhood parks that are actively used by city residents, in orderto minimize damage to users due to PM, it is desirable to create green spaces with a structure that allows PM to spread to the outside rather than stagnate inside.

키워드

과제정보

본 논문은 국립생태원 '생태계서비스 평가 기반 정책 결정 지원체계 수립(NIE-고유연구-2023-03)'의 지원을 받아 수행되었으며, 한국환경생태학회 학술대회논문집 29(2)에 일부 소개된 내용을 수정 및 발전시켰습니다.

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