• Water Engineering Research
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• 제4권1호
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• pp.19-30
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• 2003

TMDL development and implementation have great potential fur use in efforts to improve water quality management, but the TMDL approach still has several difficulties to overcome in terms of cost, time requirements, and suitable methodologies. A well-defined prioritization approach for identifying watersheds of concern among several tar-get locations that would benefit from TMDL development and implementation, based on a simple screening approach, could be a major step in solving some of these difficulties. Therefore, a web-based decision support system (DSS) was developed to help identify areas within watersheds that might be priority areas for TMDL development. The DSS includes a graphical user interface based on the HTML protocol, hydrological models, databases, and geographic information system (GIS) capabilities. The DSS has a hydrological model that can estimate non-point source pollution loading based on over 30 years of daily direct runoff using the curve number method and pollutant event mean concentration data. The DSS provides comprehensive output analysis tools using charts and tables, and also provides probability analysis and best management practice cost estimation. In conclusion, the DSS is a simple, affordable tool for the preliminary study of TMDL development via the Internet, and the DSS web site can also be used as an information web server for education related to TMDL.

• 한국환경복원기술학회지
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• 제25권6호
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• pp.65-75
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• 2022

Urban flood management(UFM) strategy ought to consider the connections and interactions between existing and new infrastructures to manage stormwater and improve the capacity to treat water. It is also important to demonstrate strategies that can be implemented to reduce the flow at flooding sources and minimize flood risk at critical locations. Although the general theory of spatial impact is popular, modeling guidelines that can provide information for implementation in real-world plans are still lacking. Under such background, this study conducted a modeling research based on an actual target site to confirm the hypothesis that it is appropriate to install green infrastructure(GI) in the source area and to take structural protection measures in the impact area, as summarized in previous studies. The results of the study proved the hypothesis, but the results were different from the hypothesis depending on which hydrological performance indicators were targeted. This study will contribute to demonstrating the effectiveness of strategies that can be implemented to reduce the flow at flooding sources and minimize the risk of flooding in critical locations in terms of spatial planning and regeneration.

• 한국농공학회논문집
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• 제56권4호
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• pp.9-19
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• 2014

The objective of this study was to evaluate of the Tank model in simulating runoff discharge from rural watershed in comparison to the SWAT (Soil and Water Assessment Tool) model. The model parameters of SWAT was calibrated by the shuffled complex evolution-university Arizona (SCE-UA) method while Tank model was calibrated by genetic algorithm (GA) and validated. Four dam watersheds were selected as the study areas. Hydrological data of the Water Management Information System (WAMIS) and geological data were used as an input data for the model simulation. Runoff data were used for the model calibration and validation. The determination coefficient ($R^2$), root mean square error (RMSE), Nash-Sutcliffe efficiency index (NSE) were used to evaluate the model performances. The result indicated that both SWAT model and Tank model simulated runoff reasonably during calibration and validation period. For annual runoff, the Tank model tended to overestimate, especially for small runoff (< 0.2 mm) whereas SWAT model underestimate runoff as compared to observed data. The statistics indicated that the Tank model simulated runoff more accurately than the SWAT model. Therefore the Tank model could be a good tool for runoff simulation considering its ease of use.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2005년도 학술발표회 논문집
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• pp.654-658
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• 2005

최종 유출지점에서의 해석 결과뿐 아니라 해석하고자 하는 유역내의 시간적, 공간적 수문 요소 분포 특성을 이해하기 위해서는 분포형 수문모형을 적용해야 하며, 최근 이에 대한 활용이 늘어나고 있다. 본 연구에서는 분포형 수문모형인 WEP 모형을 서로 다른 크기의 격자단위로 해석하여 그 결과를 비교하였다. 격자는 가로, 세로 50m, 200m격자를 사용하였으며, 각각의 연간 물수지, 하천 유출, 모의 시간, 수문 요소의 공간분포 양상 등을 비교, 분석하였다.

• 한국농공학회:학술대회논문집
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• 한국농공학회 2001년도 학술발표회 발표논문집
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• pp.340-343
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• 2001

The main objective of this study is to simulate design flood discharge of the Sungjoo basin. GIS and HEC-HMS were used in this study. GIS technique can extract various hydrological factors from D.E.M(Digital Elevation Model) and the parameters extracted from each watershed were applied to the HEC-HMS. As a result of this study, GIS technique is useful to tile extraction of watershed characteristics factors and HEC-HMS is successful in tile simulation of design flood discharge.

• 한국관개배수논문집
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• 제11권2호
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• pp.95-103
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• 2004

The objective of this study is to simulate streamflow and water quality for Gyeongan watershed (561.1 $km^2$) using AnnAGNPS (Bingner et al., 2000). The model was calibrated and verified for three years (2000, 2002, 2003) stream discharge and w

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2005년도 학술발표회(2)
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• pp.985-986
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• 2005

• 한국농림기상학회:학술대회논문집
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• 한국농림기상학회 2001년도 춘계 학술발표논문집
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• pp.18-21
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• 2001

컴퓨터 성능의 향상과 더불어 GIS의 발전 그리고 DEM(Digital Elevation Model)의 획득ㆍ사용이 가능하게 됨으로서 수문학(또는 생태학)에서의 분포형 모델은 1969년 Freeze와 Harlan이 처음으로 물리적인 기반의 분포형 모델을 소개한 이후로 그 발전을 거듭하고 있다. 국내에서는 1990년대 중반부터 GIS를 이용한 수문모델의 적용 및 개발에 대한 연구가 활발히 진행되고 있다.(중략)

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2012년도 학술발표회
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• pp.936-940
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• 2012

충분한 선행시간을 확보한 강우의 정확한 예측은 홍수피해를 저감하기 위한 필요한 조건이다. 이를 위해 지역규모의 기상모델인 Advanced Research WRF (ARW)를 적용하여 지역에 맞는 강우 예측에 가장 밀접한 관계를 갖는 물리학적 요소들의 최적화된 조건을 찾아보려 한다. 이를 위해 2006년의 7월의 강우에 대한 분석을 실시하고 생극과 분천의 강우 관측치 와의 비교를 통해 (Root Mean Square Error와 Index of Agreement 활용), ARW의 수문학적 예측을 위한 적용 가능성을 보려 한다.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2001년도 학술발표회 논문집(I)
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• pp.35-44
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• 2001

As one of advanced uses of radar, a physically based rainfall prediction method which uses a conceptual rainfall model assimilated by information from volume scanning radar is shown. As another example of advanced utilization of weather radar, results from analyzing a hierarchical time-scale structure in dependency of rainfall distribution en topography are shown.