• 대한원격탐사학회지
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• 제22권6호
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• pp.575-579
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• 2006

한국은 지난 수십 년간 도시의 확장으로 인해서 교외지역의 토지이용이 급속히 도시화되었다. 이러한 토지이용 변화는 생물 다양성 감소와 생물서식지의 파괴, 대기오염, 도시열섬현상 등의 다양한 환경 문제를 유발하였다. 토지이용 변화의 경향과 영향을 이해하기 위해 토지피복변화의 파악이 필요한데 원격탐사 (RS)와 지리정보체계(GIS)가 활용될 수 있다. 변화 파악은 어떠한 물체나 현상을 시기를 달리하여 관찰함으로써 변화를 발견하는 과정이다. 그리고 이러한 과정은 토지이용/피복 변화파악에 있어서 정량적이고 상대적인 정보를 제공할 수 있다. 원격탐사는 토지이용 현황도를 산출함에 있어서 현장조사보다 경제적이며, 광범위한 지역을 신속하고 반복적으로 다룰 수 있다 또한 축적된 자료를 이용하여 토지이용변화를 다양한 시점에서 파악하는데 활용될 수 있다. 서울의 양재천 집수구역은 1960년대 이후 가장 급속히 도시화된 지역이다, 그러므로 본 연구의 목적은 급속히 도시화된 도시하천 유역내 토지이용변화를 정량적으로 파악하여 도시토지이용계획 및 관리의 기본 자료를 제공하는데 있다.

• 한국관개배수논문집
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• 제18권2호
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• pp.3-14
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• 2011

Increased impervious surfaces alter stream hydrology resulting in lower flows during droughts and higher peak flows during floods. Not only urban area but also rural area has been expanded impervious surfaces because of increasing of greenhouses. The main objective of this study was to evaluate the performance of the AnnAGNPS (Annualized Non-Point Source Pollution Model) on the surface runoff characteristics of the Daejeon-Stream watershed, and to predict the hydrological effects due to increasing of impervious surfaces. The model parameters were obtained from the geographical information system (GIS) databases, and additional parameters calibrated with the observed data. The model was calibrated by using 2004 of the runoff data and validated by using 2002 data obtained from WAMIS (Water Management Information System) to compare the simulated results for the study watershed. R2 values and efficiency index (EI) between observed and simulated runoff were 0.78 and 0.80, respectively at the calibration period. In this study, expanding of impervious surfaces such as greenhouses caused increasing of surface runoff, but caused decreasing of total nitrogen and total phosphorus loads.

• 한국지리정보학회지
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• 제17권4호
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• pp.129-143
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• 2014

본 연구는 경상남도 창원시를 대상으로 도시 침수문제를 개선하기 위해 GIS 분석을 활용하여 침수 취약성을 평가하였다. 평가 요인은 물순환 면적률과 표면 유출특성, 강우량 분포이며, GIS 프로그램을 활용하여 평가요인에 대한 정보 구축과 침수 취약성 평가를 분석하였다. 물순환 면적률과 표면 유출특성은 도시지역에서 취약하였다. 강우량 분포는 북쪽의 농촌지역에서 많았다. 침수 취약성 평가 결과 북쪽의 농업지역과 산림지역에서 낮았다. 반대로 도시지역은 불투수 재질로 포장되어 있어 취약성이 높았다. Hotspot 공간군집분석을 이용하여 침수 취약지역의 밀집도를 분석한 결과는 도시지역에서 매우 높은 밀집도를 보였다. 그리고 이들 지역은 대부분 하천의 하류에 위치해 있어 실제 침수가 빈번히 발생하는 것으로 확인되었다. 따라서 본 연구의 침수 취약성 평가는 도시 및 환경계획 차원에서 침수 피해를 예방하기 위해 투수성 포장재질의 조성과 빗물관리 시설의 설치위치를 선정하는데 효율적인 자료로 활용 가능할 것으로 판단된다.

• Current Research on Agriculture and Life Sciences
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• 제24권
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• pp.37-42
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• 2006

The purpose of this study was a biota research and analysis for Close-to-nature stream restoration planning of Shinchun. The summary of this study is as follows; 1) The vascular plants in research area recorded of 45 species and insect fauna recorded of 34 species of 8 orders. As a result of table of community classification, the communities were two group; Quercus variabilis community(I), Pinus densiflora-Quercus variabilis-Quercus dentata community(II). 2) As a result of analysis on correlation of tree species, the level of significance in positive correlation between Quercus dentata and Corylus heterophyll aindicated 1% and between Pinus densiflora and Lespedeza bicolor also indicated 1%. 3) As a result of DBH analysis, it is expected that Quercus variabilis and Quercus dentata will dominateover other species in competition and its succession continuously maintains from now on in community I. In community II, it is assumed that there is a high possibility of changing into community of Quercus such as Quercus mongolica, Quercus dentata, and Quercus variabilis. 4) As a result of analysis on insect fauna, insect fauna consists of 94% of whole species as 32 species, 23 families, 8 orders. And 7 species, 7 families 4 orders was found in highly urbanized area, the vicinity of Sang-Dong bridge. 5) As mentioned above, Based on A biota fundamental research, Close-to-nature stream restoration planning were full of suggestions: i) Designating ecosystem preservation area, ii) Making Close-to-nature stream revetments, iii) Making pool-and-riffle, vi) Making decks for observation and walks for nature experience, v) Creating wetland biotope. Through these methods, it is necessary to promote bio-diversity and lead people to the space for eco-learning.

• 한국농공학회논문집
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• 제54권3호
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• pp.91-101
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• 2012

This study is to assess the runoff characteristics of nonpoint source pollution loads for Jecheon and Jangpyeong stream watersheds located in the upstream of Chungju lake. The SWAT (Soil and Water Assessment Tool), a physically based distributed hydrological model was calibrated and verified using 5 years (2006 to 2010) streamflow and water quality data. The Nash-Sutcliffe model efficiency for streamflow was 0.60~0.92 and the determination coefficients for sediment, Total Nitrogen (T-N), and Total Phosphorous (T-P) were 0.53~0.71, 0.51~0.91 and 0.38~0.85 respectively. The results showed that the Sediment, T-N, and T-P of Jangpyeong stream were 40.0~60.9 %, 34.8~64.1 % and 76.5~83.9 % higher than Jecheon stream watershed during wet days. The results evaluated high NPS loads at Jangpyeong stream because the percentage of urban and upland crop cultivation area Jangpyeong stream watershed was higher than Jecheon stream watershed.

• 국제학술발표논문집
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• The 6th International Conference on Construction Engineering and Project Management
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• pp.54-55
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• 2015

Increase of impervious areas due to expansion of housing area, commercial and business building of urban is resulting in property change of stormwater runoff. Also, rapid urbanization and heavy rain due to climate change lead to urban flood and debris flow damage. In 2010 and 2011, Seoul had experienced shocking flooding damages by heavy rain. All these have led to increased interest in applying LID and decentralized rainwater management as a means of urban hydrologic cycle restoration and Natural Disaster Prevention such as flooding and so on. Urban development is a cause of expansion of impervious area. It reduces infiltration of rain water and may increase runoff volume from storms. Low Impact Development (LID) methods is to mimic the predevelopment site hydrology by using site design techniques that store, infiltrate, evaporate, detain runoff, and reduction flooding. Use of these techniques helps to reduce off-site runoff and ensure adequate groundwater recharge. The contents of this paper include a hydrologic analysis on a site and an evaluation of flooding reduction effect of LID practice facilities planned on the site. The region of this Case study is LID Rainwater Management Demonstration District in A-new town and P-new town, Korea. LID Practice facilities were designed on the area of rainwater management demonstration district in new town. We performed analysis of reduction effect about flood discharge. SWMM5 has been developed as a model to analyze the hydrologic impacts of LID facilities. For this study, we used weather data for around 38 years from January 1973 to August 2014 collected from the new town City Observatory near the district. Using the weather data, we performed continuous simulation of urban runoff in order to analyze impacts on the Stream from the development of the district and the installation of LID facilities. This is a new approach to stormwater management system which is different from existing end-of-pipe type management system. We suggest that LID should be discussed as a efficient method of urban disasters and climate change control in future land use, sewer and stormwater management planning.

• 환경영향평가
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• 제12권5호
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• pp.349-358
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• 2003

Water pollution of Hwanggujicheon stream is severe because urban area of Suwon City is included in the basin. A countermeasure for water quality prevention of the stream is necessary. In this study, nonpoint pollutant load of BOD, SS, TN and TP are estimated using SWMM. The result indicates that BOD, SS, TN and TP loads during 3 months from July to September are 67.0%, 60.8%, 54.7% and 74.5% of the annual total load, respectively. We can see that most of nonpoint pollutant loads are generated in the rainy season. Annual nonpoint pollutant loads of BOD, SS, TN and TP in the Hwanggujicheon stream are 342 ton, 1,500 ton, 480 ton and 12.6 ton, respectively.

• 환경영향평가
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• 제15권2호
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• pp.157-163
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• 2006

The purpose of this study is to understand imperviousness impact for the characteristics of stormwater runoff and water temperature. The land-use map was used to estimate the watershed imperviousness(percent of impermeable area) and the RMS(Remote Monitoring System) was used to evaluate the stormwater runoff of watershed. This study was investigated for two streams(Jiam and Gongji) in Chunchon City. The detailed results of these studies are as follows; The imperviousness(%) of two watersheds(Jiam and Gongji) estimated by spatial analysis which is main function of GIS were 0.24% and 24.16%. So, Gongji watershed as urban area was about 100 times than jiam watershed as forest area. In case of rainfall of low intensity, stormwater runoff flowrate in higher imperviousness area(Gongji) was more than it in forest area(jiam). Also, The time to peak flowrate(Tp) was short in Gongji stream and the water temperature difference between Gongji and Jiam stream was about $4.4^{\circ}C$ in summer.

• 한국수자원학회논문집
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• 제38권5호
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• pp.379-390
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• 2005

본 연구에서는 경안천 유역을 대상으로 과거의 경년 항공사진과 지형도를 이용하여 하천형태의 변화를 분석하고, 하천주위의 토지이용변화를 비교해 보고자 하였다. 이를 위해 경안천 유역의 지방 1, 2급 하천에 해당하는 1966년, 1981년, 2000년 항공사진에 내, 외부표정을 실시하여 정사영상을 생성하였으며 또한 1914 - 1915년 지형도를 이용하여 1966년, 1981년, 2000년의 하천과 비교하였다. 이 영상을 이용하여 경년 하천형태와 하천부지의 토지이용을 분석하였는바, 주로 하천제방구역에서 뚜렷한 하천변화를 보였으며 이는 1974년의 팔당댐 건설에 따른 팔당호 유입부의 변화와 1980년대 후반의 하천정비에 따른 직선화 작업이 그 원인으로 판단된다. 또한 하천부지를 6개의 주요 분류 항목 (수역, 산림, 농지, 주거지, 도로, 모래톱)으로 토지이용도를 작성하여 그 면적변화를 분석해본 결과 농지, 주거지, 도로, 모래톱이 가장 큰 면적변화를 나타내었다.

• 한국환경복원기술학회지
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• 제5권6호
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• pp.14-23
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• 2002

Daejeon is a large city in Korea and very high-speedly developing city. Recently urban area is expanding and large forest patch is fragmenting into small habitats because of urban sprawl. The fragmentation of large forest patch decreases the size of habitats and increases the loss of biodiversity in urban area. This study is to analysis the connectivity of green space of Daejeon metropolitan city, and suggest the optimum location of greening site and corridor in order to increase the connectivity of green space of Daejeon metropolitan city. The findings of this study are as follows; (1) The result of this study showed that ${\alpha}$ and ${\gamma}$ index are -0.24 and 0.20. A ${\alpha}$ index is very low and a ${\gamma}$ index is relatively low. (2) The dispersion was very high, for urban forest patches were isolated through fragmentation. Therefore, it needed ecological corridors in order to connect the patches. (3) A urban streams were very important in connectivity of urban green space. Urban riparian corridor must be preserved and restored. (4) A urban green space policy and planning must be prepared to increase the connectivity and assessment of alternatives must be accomplished from perspective of connectivity. The results of this study show the practical implications in perspective of green space planning and policy in Daejeon metropolitan city. The suggestions by findings of this study are to connect green space between large forest patch in urban fringe and island green space in inner city. Also, It is required that urban stream is restored to natural feature for use of corridor by wildlife.