• 한국철도학회논문집
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• 제11권5호
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• pp.504-512
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• 2008

본 연구는 합리적인 역세권 범위를 설정하고 이에 미치는 요인을 규명하기 위해 CHAID분석을 이용하여 서울시의 강남 강북지역에 대해 SIA모형을 개발하였으며, 그 결과를 요약하면 다음과 같다. 첫째, 지하철 역세권에 영향을 미치는 변수를 중심으로 상관관계를 분석한 결과, 역세권 지가에 영향을 미치는 주요요인이 도보거리로 나타났으며, 두 관계를 이용하여 SIA모형을 개발하였다. 둘째, SIA모형식(선형식, 2차 다항식)을 비교분석한 결과, 강남 북의 역세권의 범위는 지하철역사로부터 도보거리기준으로 강남지역이 767m, 강북지역이 452m로 각각 다르게 나타났다. 셋째, 강남지역의 구간 1(0$\leq$175m)의 경우 역으로부터 거리와 가격과의 관계가 선형이 아닌 2차 다항식의 형태를 나타내고 있다 따라서 현행 도시철도법상 역세권 범위 반경 500m의 기준을 획일적으로 적용하기 보다는 도시의 지역적 특성을 고려하여 재설정하는 것이 바람직하다고 판단된다.

• 대한토목학회논문집
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• 제35권4호
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• pp.887-896
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• 2015

본 연구에서는 고립지역의 과거 AADT 자료와 사회 경제지표를 활용하여 장래 AADT를 추정하였다. 과거 교통량 추이 활용 시와 사회 경제지표 활용 시 장래 AADT를 추정했으며, 사회 경제지표를 활용하여 다중회귀 분석방식을 통한 장래 AADT 추정 시 높은 설명력과 낮은 오차율을 보였다. 지리적 특성별 AADT에 미치는 사회 경제지표 분석 결과 고립일반지역은 다양한 사회 경제지표가 AADT에 영향을 미쳤으며, 고립해안지역은 유류가격과 연관성을 보이는 것으로 나타났다. 고립지역의 장래 AADT 추정 모형은 $R^2$, MAPE 분석 시 우수한 것으로 나타났다. 이는 고립지역에서는 통과 교통량이 적고 교통량 변동이 적기 때문에 사회 경제지표를 활용한 장래 AADT 추정방식이 정확하다고 볼 수 있다.

• 한국환경복원기술학회지
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• 제7권2호
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• pp.62-67
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• 2004

Forest community structure analysis in the Seooreung area, Goyang-si was carried out to supply basic data for reasonable management and conservation. The forest vegetation of the Seooreung area was classified into Alnus japonica community, Quercus mongolica - Carpinus laxiflora community, Quercus serrata community, and Pinus densiflora community. The dominant species in the area were in the order of Quercus mongolica, Quercus serrata, Robinia pseudoacacia, Quercus variabilis, Quercus aliena, Styrax japonica, Pinus rigida, and Alnus hirsuta. According to the DBH analysis result, Pinus densiflora was dominance species in Tomb area. Pinus rigida had a density of normal distribution style in the entire forests, therefore, their dominance are expected to continue for now. However, Quercus serrata is expected to extend their influence in the future in competition with Pinus rigida. Quercus mongolica had a density of normal distribution style in the Quercus mongolica - Carpinus laxiflora community, therefore, their dominance are expected to continue for now. Carpinus laxiflora is expected to extend their influence in the future in competition with Quercus mongolica. The relationship between the distribution of dominant species of forest vegetation and soil condition in Seooreung area was investigated by analyzing soil nutrition and moisture gradient. Alnus hirsuta community was distributed in the mesic and medium nutrition area and Quercus mongolica - Carpinus laxiflora community in the serix and relative good nutrition area. Pinus densiflora community was distributed in the serix and poor nutrition area and Quercus serrata community in the subserix and medium nutrition area.

• 한국산업보건학회지
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• 제25권3호
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• pp.380-391
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• 2015

Objectives: The objective of this study is to assess airborne particulate matter pollution and its effect on health of residents living near Ansim Briquette Fuel Complex and its vicinities. Also, this study measured and analyzed the concentration of TSP, $PM_{10}$, $PM_{2.5}$, and heavy metals which influences on the environmental and respiratory disease in Ansim Briquette Fuel Complex, Daegu, Korea. Methods: In this study, we analyzed various environmental pollutants such as particulate matter and heavy metals from Ansim Briquette Fuel Complex that adversely affected local residents's health. In particular, we verified the concentration distribution and characteristics of exposure for TSP, $PM_{10}$, and $PM_{2.5}$ among particulate matters, and heavy metals(Cd, Cr, Cu, Mn, Ni, Pb, Fe, Zn, and Mg). In that regard, the official test method on air pollution in Korea for analysis of particulate matter and heavy metal in atmosphere were conducted. The large capacity air sampling method by the official test method on air pollution in Korea were applied for sampling of heavy metals in atmosphere. In addition, we evaluated the concentration of seasonal environmental pollutants for each point of residence in Ansim Briquette Fuel Complex and surrounding area. The sampling measured periods for air pollutants were from August 11, 2013 to February 21, 2014. Furthermore, we measured and analyzed the seasonal concentrations(summer, autumn and winter). Results: The average concentration for TSP, $PM_{10}$, and $PM_{2.5}$ by direct influence area at Ansim Briquette Fuel Complex were 1.7, 1.4 and 1.9 times higher than reference region. In analysis results of seasonal concentrations for particulate matter in four direct influence and reference area, concentration levels for winter were generally somewhat higher than concentrations for summer and autumn. The average concentrations for Cd, Cr, Mn, Ni, Pb, Fe, and Zn in direct influence area at Ansim Briquette Fuel Complex were $0.0008{\pm}0.0004{\mu}g/Sm^3$, $0.0141{\pm}0.0163{\mu}g/Sm^3$, $0.0248{\pm}0.0059{\mu}g/Sm^3$, $0.0026{\pm}0.0011{\mu}g/Sm^3$, $0.0272{\pm}0.0084{\mu}g/Sm^3$, $0.4855{\pm}0.1862{\mu}g/Sm^3$, and $0.3068{\pm}0.0631{\mu}g/Sm^3$, respectively. In particularly, the average concentrations for Cd, Cr, Mn, Ni, Pb, Fe, and Zn in direct influence area at Ansim Briquette Fuel Complex were 1.9, 3.6, 2.1, 1.9, 1.4, 2.6, and 1.2 times higher than reference area, respectively. The continuous monitoring and management were required for some heavy metals such as Cr and Ni. Moreover, the average concentration in winter for particulate matter in direct influence area at Ansim Briquette Fuel Complex were generally higher than concentrations in summer and autumn. Also, average concentrations for TSP, $PM_{10}$, and $PM_{2.5}$ were from 1.5 to 2.0 times, 1.2 to 1.8 times, and 1.1 to 2.3 times higher than reference area, respectively. In results for seasonal atmospheric environment, TSP, $PM_{10}$, $PM_{2.5}$, and heavy metal concentrations in direct influence area were higher than reference area. Especially, the concentrations in C station were a high level in comparison with other area. Conclusions: In the results, some particulate matters and heavy metals were relatively high concentration, in order to understand the environmental pollution level and health effect in surrounding area at Ansim Briquette Fuel Complex. The concentration of some heavy metals emitted from direct influence area at Ansim Briquette Fuel Complex were relatively higher than reference area. In particular, average concentration for heavy metals in this study were higher than average concentrations in air quality monitoring station for heavy metal for 7 years in Deagu metropolitan region. Especially, the residents near Ansim Briquette Fuel Complex may be exposed to the pollutants(TSP, $PM_{10}$, $PM_{2.5}$, and heavy metals, etc) emitted from the factories in Ansim Briquette Fuel Complex.

• Geomechanics and Engineering
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• 제38권1호
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• pp.1-13
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• 2024

The construction adit plays a pivotal role in enhancing the working face during the excavation of long-distance and deep hydraulic tunnels. However, the intersection zone between the main tunnel and the construction adit exhibits more intricate deformation patterns in surrounding rock, posing a significant threat to stability during excavation. Taking the Xianglushan tunnel in Yunnan Province, China, as a case study, the FLAC3D software is employed to simulate the excavation process at the intersection. The simulation results are verified combined with the field deformation monitoring results, and the spatial distribution of tunnel rock deformation in the intersection area are analyzed. Five excavation conditions with different intersection angles are simulated, and the surrounding rock deformation of the tunnel intersection area with different intersection angles is analyzed, and its influence range is discussed. The results show that: (1) The surrounding rock deformation in the intersection area increases rapidly during the tunnel excavation. With the increase of construction distance, the deformation of intersection area is gradually stable. (2) The deformation distribution of the tunnel rock is uneven, and the deformation of main tunnel near the intersection area is larger than that far away from the intersection area. (3) With the increase of the intersection angle, the surrounding rock deformation of the tunnel intersection and its influence range decreases gradually. The research results have certain guiding significance for the construction safety of the tunnel intersection area.

• 한국조경학회지
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• 제28권2호
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• pp.108-121
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• 2000

This study seeks what kind of factors influence to locate dwellings and to establish scenic spots in nature by a case study focused on a meandering stream. The study specially concentrates on the interrelationship between both residences and beautiful sceneries and a meander cut-off-area that reveals a special topographical characteristics, located at Samji village in Youngyang-eup, Youngyang-gun, Koungsangbuk-do. The meander cut-off area, developed at the middle or upper reaches of a river, often makes up specific landscapes such as precipitous cliffs, sheer cliffs and caves. And the area where is specially created by sudden change of flow due to erosion ;perceived by the cut surface to be the most beautiful scenic spot. These beautiful landscapes were used to be called as Dae, Dam or Gul and managed by Confucian scholars who enjoy refined taste and devote themselves to the study in nature. Moreover, the Ku-Hado-literary means the area of ex-flow-made the scholars' lving with a well prepared basis for agriculture where supplied a cornucopia of organic matters and water. The merit of agriculture made it possible that the scholars became economically independent, and the fact might be the essential point why the meander cut-off area took noticed. Actually, Cho-family has been in Smaji Village for generations, producing a large number of scholars and keeping the actual power of the region. The physical shape of the meander cut-off area, cozily surrounded by mountains, is considered as a good place for the dwelling due to the influence of traditional sight of view for location and P'ungsuchiri which is known as Feng Shui in China and geomancy in the western world. It is a fruit in it own way that we could find the ancestors' discernment and wisdom from this study, who have lived their lives adapting themselves to the given natural environment and also utilizing the nature wisely. But this is a current-argued study on the meander cut-off area. Follow-up studies have to be continued about the landscapes of the meander streams and the meander cut-off areas scattered all over the country except Samji Village and draw the characteristics from the comparative analysis.

• 한국지하수토양환경학회지:지하수토양환경
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• 제17권5호
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• pp.10-19
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• 2012

The aim of this study was to examine chemical and isotopic compositions of groundwater and lake water near an area contaminated by petroleum and to evaluate influence of petroleum on them during the period from March to August 2011. In dry season, $Ca^{2+}$ and $SO{_4}^{2-}$ were dominant in the groundwater and lake water and $Ca^{2+}$ and $HCO{_3}^-$ were significant in wet season. ${\delta}^{18}O$ and ${\delta}D$ of the groundwater and lake water were plotted near LMWL (${\delta}D=8.06{\delta}^{18}O+12.5$). ${\delta}^{18}O$ and ${\delta}D$ of the lake water did not show seasonal variation. However, ${\delta}^{18}O$ and ${\delta}D$ of the groundwater were enriched in wet season compared with those in dry season because of influence of small ponds around wells where evaporation losses were slightly experienced. Redox condition of most lake water was oxidation environment in contact with the atmosphere during the study period. However, redox condition of groundwater was transitional environment in dry season and oxidation environment in wet season because of influence of contaminant such as petroleum. In some groundwater, the concentrations of $NO{_3}^-$ in some groundwater were less than 1 mg/L because of denitrification. Also, $NO{_3}^-$ showed positive correlation with $SO{_4}^{2-}$ and weak negative correlation with $HCO{_3}^-$, because of influence of denitrification.

• 한국산학기술학회논문지
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• 제13권8호
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• pp.3726-3734
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• 2012

본 논문은 소양호 유역의 오염물질 유출에 영향을 주는 지류하천의 인자들을 선정하여 계절변화에 따른 오염물질의 유출을 해석하였다. 분석방법은 인자분석을 통하여 계절별 오염물질 유출에 영향을 주는 배수구역의 인자들을 분류하고, 대표성을 갖는 인자항목을 선정하여 평가하였다. 연구결과, SS와 T-P항목의 경우 강우유출수와 유사한 항목으로 분류되어 비강우시 오염원 관리를 통하여 수질개선에 노력하여야 할 것이다. 다음으로 인자항목의 영향력을 관찰한 결과, 계절 봄과 겨울은 전체적으로 36%의 영향력을 여름과 가을에서는 90%이상의 유의적인 영향력을 행사하고 있는 것으로 관찰되어 지류하천의 오염원 관리를 통한 수질개선 효과가 가능할 것으로 보인다. 끝으로 분류된 인자항목을 독립변수로 하여 계절변화에 따른 배수구역의 오염물질 유출특성을 고려한 유달오염부하량 예측이 가능할 것이다.

• 대한토목학회논문집
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• 제28권3D호
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• pp.287-293
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• 2008

국내의 경우 현재 연결로 접속부의 서비스수준 분석은 2005년에 제정된 우리나라의 도로용량편람(KHCM)에서 제시하고 있는 영향권 내 밀도를 효과척도로 하여 분석하고 있다. 국내의 경우 현재 연결로 접속부의 서비스수준 분석은 2005년에 개정된 KHCM에서 제시하고 있는 영향권 내 밀도를 효과척도로 하여 분석하고 있다. KHCM의 영향권 내 밀도추정모형은 고속도로만을 대상으로 구축된 것으로 도시고속도로와는 특성의 차이가 상당하여 KHCM에서 제시한 모형을 도시고속도로에 적용하는데 검증이 필요한 것으로 판단된다. 따라서 이 연구의 목적은 고속도로와는 다른 특성을 가진 도시고속도로상의 유입연결로 합류영향권내 실시간 교통특성 자료를 바탕으로 연결로 접속부의 서비스수준 평가를 위한 효과척도인 영향권 내 밀도를 보다 정확하게 추정하는 분석모델을 개발하고 2005년 의 KHCM모형과 더불어 2000년에 개정된 미국의 도로용량편람(USHCM)에서 제시하고 있는 모형을 도시고속도로(번영로)에 적용하여 그 타당성을 검토하는데 있다.

• 환경생물
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• 제42권2호
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• pp.176-186
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• 2024

본 연구에서는 우리나라 주요 조림수종인 일본잎갈나무 친환경벌채지를 대상으로 선정하여, 해당 조사지를 처리유형별(벌채지, 산림영향권, 군상잔존구, 수림대, 대조구)로 구분하였다. 이를 바탕으로 군집생태학적 연구를 통해 일본잎갈나무 친환경벌채지의 산림군집구조를 밝히고자 하였다. 중요치 분석을 통해 군상잔존구와 수림대는 교목층과 아교목층이 존재하는 것으로 나타났다. 이는 생물다양성 보존 측면에 효과 있는 계층구조를 가지고 있는 것으로 나타났으나 초본층에서는 벌채지와 산림영향권과 동일하게 덩굴성식물의 중요치가 높게 나타나 본 처리구역에서는 벌채지와 산림영향권에 조림된 일본잎갈나무 조림목에 성장에 저해되는 덩굴제거와 같은 시업이 존치된 교목에도 적용하는 보존 측면의 관리가 필요한 것으로 판단되었다. 종다양도는 모든 처리유형에서 높게 나타났는데 친환경벌채 후 초기 상태에서의 종다양도는 일시적 교란에 의해 다소 높게 나타난 것으로 사료되었다. Sørensen의 유사계수와 더불어 처리유형별 거리를 정량적으로 확인해 보고자 DCA 분석을 실시한 결과 벌채지와 산림영향권은 양 축을 기준으로 하여 밀집하는 경향이 나타났고, 군상잔존구, 수림대, 대조구가 밀집하는 경향으로 나타났다. 본 연구는 단발성 조사에 의한 연구 결과로 친환경벌채에 대하여 보다 정확히 판단하려면 장기적인 모니터링이 필수적으로 수행되어야 한다고 판단되었다. 또한 앞으로 장기적인 모니터링을 진행함으로써 친환경벌채의 메커니즘을 이해하고 미래의 생태계 구조변화를 평가하기 위한 정책적 기준 마련이 반드시 필요할 것으로 사료되었다.