도시내 공원녹지가 주변 열환경에 미치는 영향

윤용한 건국대학교 자연과학연구소 1999 建國自然科學硏究誌 Vol.10 No.2

In this study, dealt with relation of air temperature inside and outside of open space area, the scale of the parks, the investigation of air temperature distribution was conducted. This time parks with large scales were taken into consideration and their relation with the temperature were investigated. Then, relation between temperature distribution inside and outside the parks, green coverage of the parks and the temperature, number of trees and decrease in air temperature were analyzed using regression analysis. As the result, the temperature of surrounding urban area was found greater than temperature inside the park area. Phenomenon was due to the difference in the air temperature inside and outside the park area ; the down-stream flow of cooler air inside the park area resulting decrease in the air temperature of the surrounding urban area was confirmed. Again, it was understood that air temperature distribution varied corresponding to the green coverage of the parks, and increase in number of trees effective in decreasing air temperature.

녹지의 배치와 식재형태가 열환경저감효과에 미치는 영향

윤용한 한국잔디학회 2003 한국잔디학회지 Vol.17 No.4

본 연구는 녹지의 배치와 식재형태가 기온저감효과에 미치는 영향을 파악한 결과 다음과 같은 점이 밝혀졌다. 1) 녹지의 기온분포도로부터 고온역은 주변시 가지에서, 저온역은 각 녹지내의 식재지주변과 소하천주변에서 확인되었다. 2) 녹지의 배치와 기온과의 관계를 보면, 저온역은 각 녹지와 거의 일치하고 녹지간 시가지 및 풍하쪽에도 저온역이 형성되었다. 3) 녹지간 시가지와 기온과의 관계를 보면 저온역은 풍하쪽 시가지뿐 아니라 녹지간 시가지에서도 나타났다. 또한, 풍상쪽에 녹지가 존재하지 않은 경우에도 녹지간 시가지는 주변 시가지 보다 낮은 기온이었다. 4) 토지피복비율과 기온에서 식재지, 초지 및 수면이 증가하면 모두 기온저감에 효과적이고, 나지의 증가는 기온상승에 효과적이다. 5) 교목, 소교목의 순으로 그 그루의 증가는 기온저감에 유효하게 관련되어 있는 것이 파악되었다. Temperature lowering effects varied by the arrangement and types of vegetation The effects of the arrangement and types of vegetation on lowering temperature have shown following results. 1) The temperature range of a vegetation shows that a higher temperature was recorded near urban towns while lower temperature was observed around the vegetation area and small streams. 2) The relationship between the arrangement of a vegetation and the temperature indicates that the lower temperature area matches with each vegetation area. Streets between vegetations and the lower end of the wind area have also lower temperature. 3) The relationship between inter-vegetationstreets and the temperature indicates that the lower temperature area has been observed not only at the streets of the lower end of the wind but at the streets in-between streets as well. Even when there's no vegetation area from which the wind blows, inter-vegetation streets showed the lower temperature. 4) With land coverage ratio and the temperature, the increase of planted areas, grass areas, and water level have positive effects on lowering the temperature while bare areas increase it. 5) From arbor to sub-arbor, the increase of trees has a significant effect on lowering the temperature of nearby area.

도시공원에 있어서 풍속의 차이가 기상환경조절효과에 미치는 영향

윤용한 建國大學校 自然科學硏究所 2001 建國自然科學硏究誌 Vol.12 No.-

This research observed relationship between difference of wind speed and the air temperature distribution in the internal and external of the green space. Also, this study interpreted the relationship between the air temperature distribution in the internal and external of the green space, lower temperature effect and extent of green space surround, lower temperature effect and intensity of green space, regression analysis of relationship of green coverage rate and air temperature. The result, case of internal green space, is that lower temperature area is expanded the direction toward which wind blows by strength of wind speed. case fo internal green space. A faint winding max temperature difference of the day more than strong wind and lower temperature is more effect adverse wind speed.

녹지조건에 따른 상대습도의 변화

윤용한,송태갑 建國大學校 自然科學硏究所 2002 建國自然科學硏究誌 Vol.13 No.2

This reseach sought to measure the relative humidity in the green belt on clear days aimed at indentifying the relevancy of relative humidity with landcover status and the height of forest. Based on this measurement data, it used regresssion analysis and interpreted the relevancy of the relative humdity in the green belt with the landcover ratio and with the height of woody plants. As a result, high wet areas are formed in the forest land and near the water surface, while low wet areas are formed on the paved surface and bare ground. Taking a look at the relevancy between the landcover ratio and the relative humidity, the increase in forestland and grassland is ??ective in raising the relative humidity. Also, the increase in number of trees, regarless of the height of trees, is effective in raising the relative humdity, and the efficiency is big in the order of arbores and small arbores.

폭염시 토지이용유형별 보행공간 이온지수 평가 - 충주시를 대상으로 -

윤용한,윤지훈,김정호 한국환경생태학회 2019 한국환경생태학회지 Vol.33 No.3

본 연구에서는 충청북도 충주시를 대상으로 폭염시 토지이용유형별 보행공간의 기상특성과 공기이온 특성을 측정 및 분석하였다. 연구대상지 보행공간의 토지이용유형 구분은 지적편집도를 이용하여 대상지를 크게 Green Area, Residential Area, Commercial Area으로 실시하였다. 측정지점은 약 4.1km, 44개 지점으로 측정지점을 선정하여 외곽지 역 관통도로 보행공간 Green Area 12개 지점, Residential Area 14개 지점, Commercial Area 18개 지점으로 구분하여 측정하였다. 또한 폭염시 토지이용유형별 보행공간의 기온, 상대습도, 일사량, 순복사량 등의 기상요소가 음이온 발생량, 양이온 발생량에 미치는 영향을 분석하여 이온지수를 산출하였다. 폭염시 토지이용유형별 보행공간의 공기이온 특성 비교결과 평균 양이온 발생량은 Commercial Area(700.73ea/cm3) > Residential Area(600.76ea/cm3) > Green Area(589.73ea/cm3)로 분석되었다. 평균 음이온 발생량은 Green Area(663.95ea/cm3) > Residential Area(628.48ea/cm3) > Commercial Area(527.48ea/cm3) 로 분석되었다. 평균 이온지수는 Green Area(1.13) > Residential Area(1.04) > Commercial Area(0.75)로 분석되었다. 본 연구는 폭염시 토지이용유형별 보행공간에 따른 기상특성, 양이온 발생량과 음이온 발생량 현황을 확인할 수 있었으며, 토지이용유형별 보행공간의 이온지수의 차이를 확인할 수 있었다. 그러나 이동측정에 따른 토지이용유형별 정확한 비교 부족과 도로 폭 변화에 대한 정량적 특성 비교가 부족한 한계점이 존재하였 다. 따라서 도로 특성을 고려한 지속적인 연구가 이루어져야할 것으로 판단되었다. This study measured and analyzed the weather characteristics and the air-ion characteristics of walking space by land use type in Chungju, Chungcheongbuk Province during the heat wave. We used the land registration map to classify the type of land use in walking areas in the studied into the production and green area, the residential area, and the commercial area. We then selected 44 measurement points in about 4.1 km. They included 12 walking space points in the green area, 14 in the residential area, and 18 in the commercial area. Moreover, we calculated the ion index by analyzing the impact of weather factors such as temperature, relative humidity, solar radiation, and net radiation in the walking space on the anion generation and cation generation by land use type during the heat wave. Comparison of air ion characteristics in walking space by type of land use during the heat wave showed that the average cation generation was in the order of commercial area (700.73 cations/cm3) > residential area (600.76 cations/cm3) > green area (589.73 cations/cm3). The average anion generation was in the order of green area (663.95 anions/cm3) > residential area (628.48 anions/cm3) > commercial area (527.48 anions/cm3). The average ion index was in the order of green area (1.13) > residential area (1.04) > commercial area (0.75). This study checked the weather characteristics, cation generation, and anion generation in walking space according to the land use type during the heat wave and checked the difference of ion indexes in the walking space according to the land use type. However, there were limitations in the lack of accurate comparison according to the land use due to the moving measurement and the insufficient quantitative comparison according to the change of road width. Therefore, we recommend further studies that consider the road characteristics.

도시녹지의 계층구조가 기온에 미치는 영향

윤용한,김원태 한국잡초학회·한국잔디학회 2002 Weed & Turfgrass Science Vol.16 No.2

녹지주변의 토지이용형태가 녹지내의 기온저감효과에 미치는 영향

윤용한,조계현,백승엽,김승태,김원태 한국잔디학회 2003 한국잔디학회지 Vol.17 No.1

본 연구는 녹지주변의 토지이용형태의 차이가 녹지내의 기온저감효과에 미치는 영향을 정량적으로 파악하기 위해 녹지내외의 기온분포를 관측하였다. 그 데이터를 바탕으로 녹지내의 토지피복현황과 기온, 녹지주변의 기온저감효과와 그 영향범위 및 수목그루와 기온저감효과와의 관련성을 회귀분석 등에 의해 해석하였다. 그 결과 녹지내의 고온역은 포장면, 나지 주변에서 저온역은 수림지, 수면 주변에서 형성되었다. 또한 녹지를 중심으로 풍하 쪽의 관측치는 최저기온보다 최고기온이 편차가 크지만, 전체적으로는 녹지에 가까워질수록 기온이 낮아지는 경향을 보였다. 토지피복비율과 기온과의 관계를 보면, 수림지, 초지 및 수면은 기온저감에 효과적이고, 그 토지피복비율의 증감에 따라 기온저감효과가 서로 달랐다. 녹지주변의 토지이용형태의 차이가 녹지내의 기온저감효과에 미치는 영향은 Shakuzi park(주거전용지역)보다 Ageomaruyama Park (시가화조정구역) 상대적으로 효과가 컸다. The purpose of this study was to find out how different types of land use around green belts affect temperature decrease effects. For this, temperatures within and outside of green belts were measured. Based on the collected data, the study analyzed the land cover status and temperatures within green belts, temperature decrease effects and the range of effects around green belts, and the correlation between trees and temperature decrease effects by way of regression analysis. As a result, areas of the high temperature within green belts were formed on paved surfaces, whereas areas of low temperature were formed around forests or water surfaces. In addition, deviation was bigger in the highest temperature than the lowest one for areas of Leeward around green belts, but in general, there was a tendency that temperature became low near to green belts. As for the relation between land cover rate and temperature, what was effective to temperature decrease included forests, pasture and water surfaces. On the other hand, the effects of temperature decrease varied depending on increase or decrease of land cover rates. As for the influence of the different land use types around green belts on temperature decrease effects, the Shakuzi Park showed relatively stronger effects than the Ageomaruyama Park.

녹지의 산출방법이 습도변화에 미치는 영향

윤용한,박헌 한국잡초학회·한국잔디학회 2002 Weed & Turfgrass Science Vol.16 No.1

좌측 전폐절제술후 발생한 Postpneumonectomy Syndrome의 치험 1례

윤용한,이두연,김부연 대한흉부심장혈관외과학회 1998 Journal of Chest Surgery (J Chest Surg) Vol.31 No.6

전폐 절제술후 증후군은 드문질환이지만 종격동내 혈관의 정상적인 해부학적인 구조를 가진 대부분의 환자에서 전폐 절제술후에 지연 합병증으로 올수 있다. 이증후군의 임상증상으로는 대개 수술후 1년 이내에 나타나는 호흡곤란과 남아 있는 우측폐의 반복되는 감염이다. 전폐절제술후 이차적인 변화로 종격동이 좌측으로 끌려가면서 심장과 대혈관이 시계방향으로 회전하고 우측폐가 좌측 흉부 전방까지 확장되면서 나타나는 것으로 믿어지고 있다. 이와 같은 변화로 우측 폐동맥과 흉추사이에 끼이면서 기관과 우측 주기관지가 눌려지게 된다. 본 영동세브란스병원 흉부외과에서는 21세 여자환자에서 6년전에 기관지확장증으로 좌측 전폐절제술후 발생한 전폐절제술후 증후군을 좌측 개흉술후 종격동의 박리와 확장 보조물을 삽입하여 종격동 정복(mediastinal repositioning)을 시행하였고 환자의 증상은 수술후 소실되었으며 수술후 별다른 합병증 없이 퇴원하여 외래 추적관찰 중이다. Postpneumonectomy syndrome is a rare and delayed complication of left pneumonectomy in most patients with normal mediastinal vascular anatomy. This syndrome is characterized by dyspnea and recurrent pulmonary infection in the remaining right lung that typically occur within the first postoperative year. The condition is believed to be secondary to postsurgical changes that include a marked shift of the mediastinum to the left, clockwise rotation of the heart and great vessels, and herniation of the right lung into the left anterior thorax. These changes lead to compression of the trachea or right main bronchus among the thoracic spine and the right pulmonary artery. We report a case of postpneumonectomy syndrome in 15 year-old girl that followed by left pneumonectomy for bronchiectasis 6 years ago. We have inserted an expandable prosthesis in the left thoracic cavity posterior to the heart. After implantation of an expandable prosthesis, an anatomic reposition of the shifted mediastinum was achieved, which resulted in instantaneous and sustained relief. The post-operative course was uneventful and the patient was followed in OPD from after discharge to now.

건조에 의한 준설 매립 지반에 물리적 특성변화

윤용한,김원태,Yonn Yong-Han,Kim Won-Tae 한국조경학회 2006 韓國造景學會誌 Vol.34 No.2

This study was carried out to determine the ways in which drying improves and develops dredged soils which exist widely in the lowlands of Korea. Before drying there were large variations in the fundamental physico-chemical properties of dredged soils collected from different places. In the sample soils, saturated hydraulic conductivity decreased gradually with an increase in bulk density with the exception that in air-dried soils a reverse trend was observed. Also in the sample soils, the sedimentation volume and the consistency limits decreased gradually with the decrease in soil water content after the air-drying treatment. The porosity of the sample soils decreased from $0.67{\sim}0.87m^3/m^3\;to\;0.58{\sim}0.66m^3/m^3$ and the liquid-phase range decreased from $0.41{\sim}0.83m^3/m^3\;to\;0.29{\sim}0.71m^3/m^3$. The solid-phase range of sample soils increased $0.13{\sim}0.33m^3/m^3\;to\;0.24{\sim}0.37m^3/m^3$ same as above with air-drying treatment. In conclusion the air-drying treatment caused an irreversible effect on some physical properties. Accordingly, these facts indicate that the effects of air-drying treatment on these properties are considered to be resulted from irreversible changes in the structural status of the sample soils.