The Development of Coupled SWAT-SWMM Model (II) Model Characteristics and Evaluation

Kim, Nam-Won; Won, Yoo-Seung

doi:10.3741/jkwra.2004.37.7.599

Cited by 2 publications

(1 citation statement)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Bae and Oh (1998) and Lee et al (2003), for example, considered snowmelt in order to improve runoff estimations in mountain watersheds. Lee et al (2001) and Kim and Won (2004), however, focused on ground water simulation in order to improve runoff simulation for dry periods. These previous studies attempted to improve runoff simulation by either modifying the existing model structure or parameter calibration.…”

Section: Introductionmentioning

confidence: 99%

Long‐term trend of precipitation and runoff in Korean river basins

Bae

Jung

Chang

2008

Hydrological Processes

138

View full text Add to dashboard Cite

Abstract:The spatial and temporal variations of precipitation and runoff for 139 basins in South Korea were investigated for 34 years . The Precipitation-Runoff Modelling System (PRMS) was selected for the assessment of basin hydrologic response to varying climates and physiology. A non-parametric Mann-Kendall's test and regression analysis are used to detect trends in annual, seasonal, and monthly precipitation and runoff, while Moran's I is adapted to determine the degree of spatial dependence in runoff trend among the basins. The results indicated that the long-term trends in annual precipitation and runoff were increased in northern regions and decreased in south-western regions of the study area during the study period. The non-parametric Mann-Kendall test showed that spring streamflow was decreasing, while summer streamflow was increasing. April precipitation decreased between 15% and 74% for basins located in south-western part of the Korean peninsula. June precipitation increased between 18% and 180% for the majority of the basins. Trends in seasonal and monthly streamflow show similar patterns compared to trends in precipitation. Decreases in spring runoff are associated with decreases in spring precipitation which, accompanied by rising temperatures, are responsible for reducing soil moisture. The regional patterns of precipitation and runoff changes show a strong to moderate positive spatial autocorrelation, suggesting that there is a high potential for severe spring drought and summer flooding in some parts of Korea if these trends continue in the future.

show abstract

Section: Introductionmentioning

confidence: 99%

Long‐term trend of precipitation and runoff in Korean river basins

Bae

Jung

Chang

2008

Hydrological Processes

138

View full text Add to dashboard Cite

show abstract

Comparison of Natural Flow Estimates for the Han River Basin Using TANK and SWAT Models

김철겸¹,

김남원²

2012

Journal of Korea Water Resources Association

View full text Add to dashboard Cite

Two models, TANK and SWAT (Soil and Water Assessment Tool) were compared for simulating natural flows in the Paldang Dam upstream areas of the Han River basin in order to understand the limitations of TANK and to review the applicability and capability of SWAT. For comparison, simulation results from the previous research work were used. In the results for the calibrated watersheds (Chungju Dam and Soyanggang Dam), two models provided promising results for forecasting of daily flows with the Nash-Sutcliffe model efficiency of around 0.8. TANK simulated observations during some peak flood seasons better than SWAT, while it showed poor results during dry seasons, especially its simulations did not fall down under a certain value. It can be explained that TANK was calibrated for relatively larger flows than smaller ones. SWAT results showed a relatively good agreement with observed flows except some flood flows, and simulated inflows at the Paldang Dam considering discharges from upper dams coincided with observations with the model efficiency of around 0.9. This accounts for SWAT applicability with higher accuracy in predicting natural flows without dam operation or artificial water uses, and in assessing flow variations before and after dam development. Also, two model results were compared for other watersheds such as Pyeongchang-A, Dalcheon-B, Seomgang-B, Inbuk-A, Hangang-D, and Hongcheon-A to which calibrated TANK parameters were applied. The results were similar to the case of calibrated watersheds, that TANK simulated poor smaller flows except some flood flows and had same problem of keeping on over a certain value in dry seasons. This indicates that TANK application may have fatal uncertainties in estimating low flows used as an important index in water resources planning and management. Therefore, in order to reflect actually complex and complicated physical characteristics of Korean watersheds, and to manage efficiently water resources according to the land use and water use changes with urbanization or climate change in the future, it is necessary to utilize a physically based watershed model like SWAT rather than an existing conceptual lumped model like TANK.

show abstract

The Development of Coupled SWAT-SWMM Model (II) Model Characteristics and Evaluation

Cited by 2 publications

References 3 publications

Long‐term trend of precipitation and runoff in Korean river basins

Long‐term trend of precipitation and runoff in Korean river basins

Comparison of Natural Flow Estimates for the Han River Basin Using TANK and SWAT Models

Contact Info

Product

Resources

About