• 대기
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• 제29권2호
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• pp.131-147
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• 2019

On the urban scale, Micro-climate analysis models for urban scale have been developed to investigate the atmospheric characteristics in urban surface in detail and to predict the micro-climate change due to the changes in urban structure. BioCAS (Biometeorological Climate Impact Assessment System) is a system that combines such analysis models and has been implemented internally in the Korea Meteorological Administration. One of role in this system is the analysis of the health impact by heat waves in urban area. In this study, the vegetation cooling models A and B were developed and linked with BioCAS and evaluated by the temperature drop at the vegetation areas during ten selected heat-wave days. Smaller prediction errors were found as a result of applying the vegetation cooling models to the heat-wave days. In addition, it was found that the effects of the vegetation cooling models produced different results according to the distribution of vegetation area in land cover near each observation site - the improvement of the model performance on temperature analysis was different according to land use at each location. The model A was better fitted where the surrounding vegetation ratio was 50% or more, whereas the model B was better where the vegetation ratio was less than 50% (higher building and impervious areas). Through this study, it should be possible to select an appropriate vegetation cooling model according to its fraction coverage so that the temperature analysis around built-up areas would be improved.

• 한국기후변화학회지
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• 제7권3호
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• pp.299-314
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• 2016

The aim of this paper is to review integrated assessment studies conducted to address the impacts of climate change sea-level rise on agricultural sector and to derive suggestions for improving the integrated assessment process to assist decision-makers in establishing climate change adaptation policy. We collect integrated assessment studies which are based on the impact-pathway analysis, compare their step-by-step procedures and identify main factors addressed in each step. The assessment process is typically carried out in the sequence of scenario development, determination of assessment scope, physical impact assessment, economic analysis and synthesis of the outcomes from each step. We identify two types of integrated assessment. The first one examines the impacts of changes in temperature and/or precipitation on the crop-cultivation patterns and/or agricultural productivity and resulting economic effects on agricultural sector. The other investigates the impacts of sea-level rise on land use/coverage and resulting economic damages in terms of land-value loss where the effects on agriculture is treated as one sector among others. To enhance integrated assessment, we suggest that 1) scenarios need to incorporate the effects of climate change and sea-level rise simultaneously, 2) scope of the assessment needs to be extended to include ecosystem services as well as crop production, 3) social and cultural aspects need to be considered in addition to economic analysis, and 4) synthesis of the outcomes from each step should be able to combine quantitative as well as qualitative information.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2007년도 학술발표회 논문집
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• pp.1-7
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• 2007

New Zealand is a hydrologically diverse and active country. This paper presents an overview of the major hydrological issues and problems facing New Zealand and provides examples of some the research being undertaken to solve the problems. Fundamental to any environmental decision making is the provision of good quality hydrometric data. Reduced funding for the national hydrometric network has meant a reduction in the number of monitoring sites, the decision on how to redesign the network was made using information on geographic coverage and importance of each site. New Zealand faces a major problem in understanding the impacts of rapid land use change on water quantity and quality. On top of the land use change is overlain the issue of agricultural intensification. The transfer of knowledge about impacts of change at the small watershed scale to much larger, more complex watersheds is one that is attracting considerable research attention. There is a large amount of research currently being undertaken to understand the processes of water and nutrient movement through the vadose zone into groundwater and therefore understanding the time taken for leached nutrients to reach receiving water bodies. The largest water management issue of the past 5 years has been based around fair and equitable water allocation when there is increasing demand for irrigation water. Apart from policy research into market trading for water there has been research into water storage and transfer options and improving irrigation efficiency. The final water management issue discussed concerns the impacts of hydrological extremes (floods and droughts). This is of particular concern with predictions of climate change for New Zealand suggesting increased hydrological extremes. Research work has concentrated on producing predictive models. These have been both detailed inundation models using high quality LIDAR data and also flood models for the whole country based on a newly interpolated grid network of rainfall.

• 지적과 국토정보
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• 제53권1호
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• pp.65-81
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• 2023

최근 급상승된 부동산 가격의 하락으로 무리하게 갭투자를 한 투기꾼들로 인한 부동산 전세 사기와 관련된 언론 보도가 급증하고 있다. 이로 인한 세입자의 피해 사례가 계속 증가함에 따라 정부는 세입자 보호와 전세사기 방지를 위한 대책을 수립하고 있다. 그동안 주택임대차보호법, 임차권등기명령 등 세입자 보호를 목적으로 하는 법령에 관한 연구는 활발히 진행되고 있으나, 공적 장부간 정보 불일치로 인한 사기가 급증하면서 공적 장부의 정보의 일관성에 관한 연구가 시급한 실정이다. 본 연구는 부동산과 연관성이 높은 건축물대장, 도로명주소대장의 건물정보를 매칭키를 활용한 매칭방법론에 대한 연구를 모색하고 다른 공적 장부와의 연계방안도 검토하고자 한다.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2020년도 학술발표회
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• pp.125-125
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• 2020

European Space Agency's Sentinel-1 has an improved spatial and temporal resolution, as compared to previous satellite data such as Envisat Advanced SAR (ASAR) or Advanced Scatterometer (ASCAT). Thus, the assumption used for low-resolution retrieval algorithms used by ENVISAT ASAR or ASCAT is not applicable to Sentinel-1, because a higher degree of land surface heterogeneity should be considered for retrieval. The assumption of homogeneity over land surface is not valid any more. In this study, considering that soil roughness is one of the key parameters sensitive to soil moisture retrievals, various approaches are discussed. First, soil roughness is spatially inverted from Sentinel-1 backscattering over Yanco sites in Australia. Based upon this, Artificial Neural Networks data (feedforward multiplayer perception, MLP, Levenberg-Marquadt algorithm) are compared with Fractal approach (brownian fractal, Hurst exponent of 0.5). When using ANNs, training data are achieved from theoretical forward scattering models, Integral Equation Model (IEM). and Sentinel-1 measurements. The network is trained by 20 neurons and one hidden layer, and one input layer. On the other hand, fractal surface roughness is generated by fitting 1D power spectrum model with roughness spectra. Fractal roughness profile is produced by a stochastic process describing probability between two points, and Hurst exponent, as well as rms heights (a standard deviation of surface height). Main interest of this study is to estimate a spatial variability of roughness without the need of local measurements. This non-local approach is significant, because we operationally have to be independent from local stations, due to its few spatial coverage at the global level. More fundamentally, SAR roughness is much different from local measurements, Remote sensing data are influenced by incidence angle, large scale topography, or a mixing regime of sensors, although probe deployed in the field indicate point data. Finally, demerit and merit of these approaches will be discussed.

• Ecology and Resilient Infrastructure
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• 제2권4호
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• pp.311-316
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• 2015

본 연구는 도시생태계 건전성 증진을 위한 녹지총량제 도입을 위해 국내 법규를 토대로 녹지총량의 정의와 유형을 분류하고, 전국단위의 녹지총량 평가지표를 도출하여 산정하였으며, 이를 토대로 전국 시도별 녹지총량을 지수화 하였다. 결과는 다음과 같다. 첫째, 녹지총량은 "도시공원 및 녹지 등에 관한 법률", "토의 계획 및 이용에 관한 법률" 등에서 정의하는 '녹지', '공원녹지', '녹지지역' 등을 포함하는 포괄적 의미의 녹지이다. 둘째, 녹지총량 산정을 위한 녹지의 유형은 도시공원과 완충녹지, 경관녹지, 연결녹지 등의 시설녹지를 포함하는 공원녹지, 보전녹지지역, 생산녹지지역, 자연녹지지역을 포함하는 녹지지역, 교목, 관목, 지피 등의 식생으로 점유된 산림, 초지, 습지를 포함하는 녹피지로 분류할 수 있다. 셋째, 1인당 공원녹지, 공원녹지율, 1인당 녹지지역, 녹지지역율, 1인당 녹피면적, 녹피율 등 6가지 평가지표를 적용하여 전국 시도별 녹지총량을 산정하였으며, 이를 토대로 시도별 녹지총량을 지수화한 결과에 따르면 특별 광역시에서는 세종특별시가 가장 높았고 서울특별시와 대구광역시가 가장 낮았으며, 도 지역에서는 충청북도가 가장 높았고 경기도와 제주특별자치도가 가장 낮았다.

• Journal of Ecology and Environment
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• 제41권10호
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• pp.290-301
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• 2017

Background: Forest edges create distinctive ecological space as adjacent constituents, which distinguish between different ecosystems or land use types. These edges are made by anthropogenic or natural disturbance and affects both abiotic and biotic factors gradually. This study was carried out to assess edge effects on disturbed landscape at the pine-dominated clear-cut area in a genetic resources reserve in Uljin-gun, eastern Korea. This study aims to estimate the distance of edge influence by analyzing changes of abiotic and biotic factors along the distance from forest edge. Further, we recommend forest management strategy for sustaining healthy forest landscapes by reducing effects of deforestation. Results: Distance of edge effect based on the abiotic factors varied from 8.2 to 33.0 m. The distances were the longest in $Mg^{2+}$ content and total nitrogen, $K^+$, $Ca^{2+}$ contents, canopy openness, light intensity, air humidity, $Na^+$ content, and soil temperature followed. The result based on biotic factors varied from 6.8 to 29.5 m, coverage of tree species in the herb layer showed the longest distance and coverage of shrub plant in the herb layer, evenness, species diversity, total coverage of herb layer, and species richness followed. As the result of calculation of edge effect by synthesizing 26 factors measured in this study, the effect was shown from 11.0 m of the forest interior to 22.4 m of the open space. In the result of stand ordination, Rhododendron mucronulatum, R. schlippenbachii, and Fraxinus sieboldiana dominated arrangement of forest interior sites and Quercus mongolica, Vitis amurensis, and Rubus crataegifolius dominated spatial distribution of the open area plots. Conclusions: Forest interior habitat lies within the influence of both abiotic and biotic edge effects. Therefore, we need a forest management strategy to sustain the stability of the plant and further animal communities that depend on its stable conditions. For protecting forest interior, we recommend selective logging as a harvesting method for minimizing edge effects by anthropogenic disturbance. In fact, it was known that selective logging contributes to control light availability and wind regime, which are key factors affecting microclimate. In addition, ecological restoration applying protective planting for the remaining forest in the clear-cut area could contribute to prevent continuous disturbance in forest interior.

• 한국조경학회지
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• 제47권2호
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• pp.100-116
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• 2019

도시지역의 사회문제 및 환경위험을 완화시킬 수 있는 수단이자 사회적 측면에서의 지속가능한 발전을 위해 질 좋은 도시녹지의 양적인 확대 및 관리에 대한 중요성이 부각되고 있다. 이에 본 연구에서는 서울시 중구, 동대문구, 성동구 등 3개 자치구의 46개 행정동을 대상으로 각종 사회경제적 데이터와 녹지데이터, 위성영상 등을 활용해 녹지의 분포 현황과 이의 분배적 형평성을 파악하고자 했다. 연구의 분석과정은 1) 행정동별 녹지분포 현황과 사회경제적 현황, 녹지의 효과를 체감하기 쉬운 가로수 면적 등을 파악하고, 위성영상을 이용한 정규식생지수와 지표면온도를 확인했다. 2) 이를 바탕으로 각 변수들의 상관관계 및 회귀분석을 실시하였다. 연구지역 녹지의 분배적 형평성 분석결과, 행정동별 환경특성 중 녹지율과 면적에서 큰 편차를 보였으며, 정규식생지수, 지표면온도 모두 동별 차이가 큰 것으로 나타났다. 또한, 환경변수와 사회경제적 변수와의 상관관계 분석결과, 기초생활수급자비율과 장애인비율이 높은 동의 정규식생지수가 낮고 지표면온도는 높은 것으로 나타나 환경형평성이 낮은 것으로 평가되었다. 환경불평등은 주거지역의 환경요인뿐 아니라, 주거형태와도 밀접하게 관련되어 있는 것으로 판단된다. 아파트 단지의 지표면온도는 단독 및 다가구 주택 밀집지역에 비해 $2.0^{\circ}C$ 가량 낮았으며, 정규식생지수 평균은 아파트 단지가 단독 및 다가구 주택 밀집지역에 비해 2배 이상 높은 것으로 나타났다. 녹지분포의 행정동별, 주거유형별 환경불평등성이 확인된 만큼 소외지역에 녹지의 양적 확충이 필요하며, 녹지 환경에서의 사회적 배제 극복을 위한 정책 등을 통해 배제된 지역 주민들의 삶의 질 개선 노력이 필요하다.

• 한국주거학회논문집
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• 제21권6호
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• pp.99-108
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• 2010

This study investigated the environmental indices in environmental administration, and to presents how to develop a sustainable environmental evaluation index. The index should be used to evaluate composite plans in the environmental aspects as well as means for setting goals of basic plans for the environment and its management. Specifically, the goals of composite plans are to check environments and land use frame, and evaluate individual measures (public projects). Environment policies are required to be 'a policy creating a clean environment' from 'a policy of environment regulation'. For the organization of a basic framework of environment policies, five topics are needed to be considered, such as the clarification of the idea of environment, establishment of environment regulations, environment management plan, plan to support civilian's action, and local government's efforts for the global matters of environment. For the amenity environments, people should expand their environmental behavior based on their voluntary intentions in transformation of personal life styles, projects with less load on the environment, development of environmentally-friendly projects with consideration for their impact on the earth. This study suggests that they should put more efforts into the development and implementation of useful environmental indices which effectively analyse the regional character to protect the natural ecology and create an sustainable environment with wide coverage.

• Journal of Ecology and Environment
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• 제43권2호
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• pp.246-253
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• 2019

Background: Water use efficiency (WUE) is an indicator of the trade-off between carbon uptake and water loss to the atmosphere at the plant or ecosystem level. Understanding temporal dynamics and the response of WUE to climatic variability is an essential part of land degradation assessments in water-limited dryland regions. Alternative definitions of and/or alternative methodologies used to measure WUE, however, have hampered intercomparisons among previous studies of different biomes and regions. The present study aims to clarify semantic differences among WUE parameters applied in previous studies and summarize these parameters in terms of their definition and methodology. Additionally, the consistency of the responses of alternative WUE parameters to interannual changes in moisture levels in Northeast Asia dryland regions (NADRs) was tested. Results: The literature review identified more than five different WUE parameters defined at leaf and ecosystem levels and indicates that major conclusions regarding the WUE response to climatic variability were partly inconsistent depending on the parameters used. Our demonstration of WUE in NADR again confirmed regional inconsistencies and further showed that inconsistencies were more distinct in hyper- and semi-arid climates than in arid climates, which might reflect the different relative roles of physical and biological processes in the coupled carbon-water process. Conclusions: The responses of alternative WUE parameters to drying and wetting may be different in different regions, and regionally different response seems to be related to aridity, which determines vegetation coverage.