• 한국산학기술학회논문지
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• 제19권11호
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• pp.8-17
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• 2018

방콕(태국) 등 동남아시아 도시 홍수의 경우 열악한 배수시설로 포장된 도로를 따라 광대한 도심지역이 저수위 홍수에 침수되고 있다. 모래가 부족한 도심지의 경우 모래주머니 등 기존 침수방지 방법은 유효하지 않으므로 인공적인 침수방어 구조물을 설치할 필요가 있다. 이와 관련하여 유럽 및 북미 일부 선진국을 중심으로 개발된 침수 월류방어장비들은 고가에 복잡한 시공성을 가지고 있어 동남아시아 지역에 저변을 확대하기 어려운 상황이다. 따라서 저가 및 단순 고기능형 도심형 홍수임시차수시스템(FRDS)을 개발할 필요가 있다. 이에 본 연구에서는 FRDS의 개요 고찰, 국내외 개발 동향 분석, 개발 니즈 및 방향 제시 등을 통해 동남아시아에 적용할 수 있는 FRDS를 개발하였다. 개발한 시스템은 한국건설생활시험연구원 서산 옥외실증시험센터에서 누수율변형 시험 및 내충격성 시험에 관한 KS 성능평가를 실시하였으며, KS F 2639(누수율 변형 시험)과 KS F2236(내충격성 시험) 기준을 통과하였다. 본 연구결과는 홍수재난과 관련하여 동남아국가 도시홍수에 적용할 뿐만 아니라, 국내 홍수빈발지역 및 주요시설 등에 활용할 수 있을 것으로 판단되며, 도시홍수와 관련하여 주요지자체 및 시설물 관리기관의 과학적 능동적 대응을 유도할 수 있을 것이다.

• 한국농공학회논문집
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• 제64권5호
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• pp.53-65
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• 2022

Most of the reservoirs managed by the city and county are small and it is difficult to respond to climate change because the drainage area is small and the inflow increases rapidly when a heavy rain occurs. In this study, the current status of reservoirs managed by city and county in Gyeonggi-do was reviewed and flood vulnerability due to climate change was analyzed. In order to analyze the impact of climate change, CMIP6-based future climate scenario provided by IPCC was used, and future rainfall data was established through downscaling of climate scenario (SSP8-8.5). The flood vulnerability of reservoirs due to climate change was evaluated using the concept provided by the IPCC. The future annual precipitation at six weather stations appeared a gradual increase and the fluctuation range of the annual precipitation was also found to increase. As a result of calculating the flood vulnerability index, it was analyzed that the flood vulnerability was the largest in the 2055s period and the lowest in the 2025s period. In the past period (2000s), the number of D and E grade reservoirs was 58, but it was found to increase to 107 in the 2055s period. In 2085s, there were 17 E grade reservoirs, which was more than in the past. Therefore, it is necessary to take measures against the increasing risk of flooding in the future.

• 한국환경생태학회:학술대회논문집
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• 한국환경생태학회 2003년도 추계학술논문발표회 논문집
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• pp.55-72
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• 2003

Dam is a barrier constructed to divert, hold water and raise its level for purpose of water supply, irrigation, power generation, flood control, and recreational facilities, etc. Therefore, there are many inevitable environmental impacts on dam construction. We need some better tools to predict the impacts and mitigate measures before and after dam construction. For this purpose I discussed several feasible suggestions and provisions mainly related to environmental impact assessment.

• 한국농공학회논문집
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• 제62권6호
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• pp.85-95
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• 2020

According to the standard guidelines of design flood (MLTM, 2012; MOE, 2019), the design flood is calculated based on past precipitation. However, due to climate change, the frequency of extreme rainfall events is increasing. Therefore, it is necessary to analyze future floods' volume by using climate change scenarios. Meanwhile, the standard guideline was revised by MOE (Ministry of Environment) recently. MOE proposed modified Huff distribution and new CN (Curve Number) value of forest and paddy. The objective of this study was to analyze the change of flood volume by applying the modified Huff and newly proposed CN to the probabilistic precipitation based on SSP and RCP scenarios. The probabilistic rainfall under climate change was calculated through RCP 4.5/8.5 scenarios and SSP 245/585 scenarios. HEC-HMS (Hydrologic Engineering Center - Hydrologic Modeling System) was simulated for evaluating the flood volume. When RCP 4.5/8.5 scenario was changed to SSP 245/585 scenario, the average flood volume increased by 627 ㎥/s (15%) and 523 ㎥/s (13%), respectively. By the modified Huff distribution, the flood volume increased by 139 ㎥/s (3.76%) on a 200-yr frequency and 171 ㎥/s (4.05%) on a 500-yr frequency. The newly proposed CN made the future flood value increase by 9.5 ㎥/s (0.30%) on a 200-yr frequency and 8.5 ㎥/s (0.25%) on a 500-yr frequency. The selection of climate change scenario was the biggest factor that made the flood volume to transform. Also, the impact of change in Huff was larger than that of CN about 13-16 times.

• 한국지리정보학회지
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• 제26권4호
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• pp.237-250
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• 2023

본 연구에서는 UAV기반 항공사진측량에 의해 정사사진 및 DEM을 생성하고 이를 침수흔적도 제작을 위한 정밀조사에 적용하고자 하였다. 2012년 9월 제6호 태풍 산바(Sanba)의 영향으로 제방붕괴 및 내수침수 피해가 발생한 구미시 고아읍 농경지를 연구대상지역으로 선정하였다. UAV사진측량 성과의 최적 정확도를 얻기 위해 연구지역에 19점의 GCP 최적 배치상태에서 Pix4Dmapper 소프트웨어를 이용한 영상처리를 통하여 점군 데이터, DEM 및 정사영상을 생성하였다. loudCompare의 CSF Filtering를 적용하여 지면요소와 비지면요소로 point cloud를 분리한 후 GRASS GIS 소프트웨어에서 비지면요소만을 사용하여 최종적으로 보정된 DEM을 생성하였다. 최종 생성된 DEM으로부터 추출한 침수위 및 침수심 데이터와 한국국토정보공사(LX)의 공공데이터 포털사이트를 통하여 제공된 2012년 당시 같은 지역에 대한 기존 자료의 침수위 및 침수심 데이터를 비교하여 제시하였다.

• 한국산학기술학회논문지
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• 제21권9호
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• pp.238-250
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• 2020

본 연구는 도시지역에 침수피해가 발생하였을 경우, 장기적인 측면에서 침수피해를 최소화 할 수 있는 방안을 마련하기 위해 비구조적인 대책에 초점을 맞추어 도시공간적인 요인과 침수피해의 영향 관계를 분석하였다. 도시공간적인 요인에 의한 침수피해 영향을 분석하고자 다중회귀 분석(Multiple Regression Analysis)을 활용하여 적용하였다. 도시공간적인 요인은 Open Space, 방재시설, 도시화 부문으로 유형화하였다. 분석 결과, 침수피해 지역은 일정한 지역에 한정되어 발생하며, 공간적으로 매우 높은 상관성을 보이고 있음을 알 수 있다. Open Space의 면적이 넓을수록 침수피해액이 감소하는 바, 녹지, 공원 등의 감소가 침수피해를 증가시키고 있음을 확인할 수 있어, 도시의 안전이라는 기능적인 부분에 있어서 침수피해를 예방하고 대응하기 위해 매우 중요한 요인임을 알 수 있다. 도시화 부문에 포함되는 인구밀도, 지역내총생산(GRDP) 등의 요인은 그 값이 클수록 침수피해액은 증가하는 것으로 분석되어, 침수피해를 유발시키는 원인으로 판단된다. 따라서 기후변화에 적응하기 위해서는 녹지, 공원 등의 도시공간 계획을 전략적으로 수립해야 하며, 인구밀도, 지역내총생산(GRDP) 등은 침수피해를 유발시키는 주요 요인이므로 회복력 차원에서 적절하게 활용한다면 대응과 복구 역할을 할 것으로 판단된다.

• 한국환경과학회지
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• 제20권10호
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• pp.1309-1317
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• 2011

This study selected 6 river reach, which have various curved-channel, included in an object of study as making the Nakdong River, which is a real nature river, as a point of an object of study by using SMS RMA-2 model, a 2D numerical analysis model, and applied project flood and analyzed and examined characteristic of hydrological property and super-elevation, which includes characteristic of the velocity of a moving fluid. As a result, in a river reach, whose width is wide, angle of curved-channel has impact on the velocity of a moving fluid of inside of curved-channel and in a river reach, whose width is narrow, the radius of curvature and width of the river have impact on the velocity of a moving fluid of inside of curved-channel. Also it found out that the ratio of reduction in water-level of inside of curved-channel is more bigger than ratio of increasing in water-level of outside of curved-channel when project flood is increasing and angle of curve is increasing. Based on this, this study would be used as a expectation of danger and preliminary data in planning real river or a business, that creates an environment.

• 환경영향평가
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• 제4권1호
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• pp.17-23
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• 1995

To assess preliminarily the contamination potential of water resources including groundwater owing to the hydrogeological characteristics of landfill site and the potential impact to humans and animals through contamination of water resources by leachate, "Landfill Site Preliminary Assessment Model(LASPAS)" was contrived. LASPAS could help them proritization of remediation of landfil sites by the convenient and relatively simple evaluation method of landfill site features. LASPAS was designd to aliot numerical ratings to landfill site related factors undermentioned; 1) hydrogeological factors such as hydraulic conductivity of aquifer, thickness of confining layer over aquifer, topographical slope, net recharge, and subsurface containment 2) water resources contamination factors of impacts on receptors such as proximity to drinking water supply, substitutability of drinking water supply, type of use of water resources, known impact on drinking water supply, and flood potential.

• 환경영향평가
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• 제23권1호
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• pp.39-50
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• 2014

In recent years, the frequency and scale of the natural disasters are growing rapidly due to the global climate change. In case of the urban flooding, high-density of population and infrastructure has caused the more intensive damages. In this study, we analyzed the spatial characteristics of urban flooding damage factors using GWR(Geographically Weighted Regression) for effective disaster prevention and then, classified the causes of the flood damage by spatial characteristics. The damage factors applied consists of natural variables such as the poor drainage area, the distance from the river, elevation and slope, and anthropogenic variables such as the impervious surface area, urbanized area, and infrastructure area, which are selected by literature review. This study carried out the comparative analysis between OLS(Ordinary Least Square) and GWR model for identifying spatial non-stationarity and spatial autocorrelation, and in the results, GWR model has higher explanation power than OLS model. As a result, it appears that there are some differences between each of the flood damage areas depending on the variables. We conclude that the establishment of disaster prevention plan for urban flooding area should reflect the spatial characteristics of the damaged areas. This study provides an improved understandings of the causes of urban flood damages, which can be diverse according to their own spatial characteristics.

• 대기
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• 제30권2호
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• pp.155-167
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• 2020

In order to produce more detailed and accurate information of river discharge and freshwater discharge, global high-resolution hydrodynamic model (CaMa-Flood) is applied to an operational land surface model of global seasonal forecast system. In addition, bias correction to grid runoff for the hydrodynamic model is attempted. CaMa-Flood is a river routing model that distributes runoff forcing from a land surface model to oceans or inland seas along continentalscale rivers, which can represent flood stage and river discharge explicitly. The runoff data generated by the land surface model are bias-corrected by using composite runoff data from UNH-GRDC. The impact of bias-correction on the runoff, which is spatially resolved on 0.5° grid, has been evaluated for 1991~2010. It is shown that bias-correction increases runoff by 30% on average over all continents, which is closer to UNH-GRDC. Two experiments with coupled CaMa-Flood are carried out to produce river discharge: one using this bias correction and the other not using. It is found that the experiment adapting bias correction exhibits significant increase of both river discharge over major rivers around the world and continental freshwater discharge into oceans (40% globally), which is closer to GRDC. These preliminary results indicate that the application of CaMa-Flood as well as bias-corrected runoff to the operational global seasonal forecast system is feasible to attain information of surface water cycle from a coupled suite of atmospheric, land surface, and hydrodynamic model.