3-D hydrodynamic modeling of Yongdam Lake, Korea using EFDC

Seo, Dongil; Sigdel, Rajesh; Kwon, Ki-chang; Lee, Y. S.

doi:10.5004/dwt.2010.1894

Cited by 21 publications

(11 citation statements)

References 1 publication

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“…The simulated results indicated that WASP was able to follow the trend of the monitoring data. However, because this study did not consider the effect of hydraulic disturbance by dam release and the vertical variations such as stratification in the lake, the three‐dimensional hydrodynamic modeling studies with the depth monitored data should be further conducted to better estimate the flow and exchanges in the lake system (Seo et al ., , ; Ekdal et al ., ).…”

Section: Resultsmentioning

confidence: 99%

Assessment of Future Climate Change Impact on Water Quality of Chungju Lake, South Korea, Using WASP Coupled with SWAT

Park

Kim

2013

J American Water Resour Assoc

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This study is to evaluate the future potential impact of climate change on the water quality of Chungju Lake using the Water Quality Analysis Simulation Program (WASP). The lake has a storage capacity of 2.75 Gm3, maximum water surface of 65.7 km2, and forest‐dominant watershed of 6,642 km2. The impact on the lake from the watershed was evaluated by the Soil and Water Assessment Tool (SWAT). The WASP and SWAT were calibrated and validated using the monthly water temperatures from 1998 to 2003, lake water quality data (dissolved oxygen, total nitrogen [T‐N], total phosphorus [T‐P], and chlorophyll‐a [chl‐a]) and daily dam inflow, and monthly stream water quality (sediment, T‐N, and T‐P) data. For the future climate change scenario, the MIROC3.2 HiRes A1B was downscaled for 2020s, 2050s, and 2080s using the Change Factor statistical method. The 2080s temperature and precipitation showed an increase of +4.8°C and +34.4%, respectively, based on a 2000 baseline. For the 2080s watershed T‐N and T‐P loads of up to +87.3 and +19.6%, the 2080s lake T‐N and T‐P concentrations were projected to be 4.00 and 0.030 mg/l from 2.60 and 0.016 mg/l in 2000, respectively. The 2080s chl‐a concentration in the epilimnion and the maximum were 13.97 and 52.45 μg/l compared to 8.64 and 33.48 μg/l in 2000, respectively. The results show that the Chungju Lake will change from its mesotrophic state of 2000 to a eutrophic state by T‐P in the 2020s and by chl‐a in the 2080s. Editor's note: This paper is part of a featured series on Korean Hydrology. The series addresses the need for a new paradigm of river and watershed management for Korea due to climate and land use changes.

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Section: Resultsmentioning

confidence: 99%

Assessment of Future Climate Change Impact on Water Quality of Chungju Lake, South Korea, Using WASP Coupled with SWAT

Park

Kim

2013

J American Water Resour Assoc

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“…6 shows accuracies in the prediction of volume and water level relationships and annual water level simulation for few selected grid systems. Seo et al (2010).…”

Section: Design Of Grid Network and Efdc Hydrodynamic Modeling Resultsmentioning

confidence: 99%

Application of EFDC and WASP7 in Series for Water Quality Modeling of the Yongdam Lake, Korea

Seo¹,

김민애²

2011

Journal of Korea Water Resources Association

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This study aims to test the feasibility of combined use of EFDC (Environmental Fluid Dynamics Code) hydrodynamic model and WASP7.3 (Water Quality Analysis Program) model to improve accuracy of water quality predictions of the Yongdam Lake, Korea. The orthogonal curvilinear grid system was used for EFDC model to represent riverine shape of the study area. Relationship between volume, surface and elevation results were checked to verify if the grid system represents morphology of the lake properly. Monthly average boundary water quality conditions were estimated using the monthly monitored water quality data from Korean Ministry of Environment DB system. Monthly tributary flow rates were back-routed using dam discharge data and allocated in proportion to each basin area as direct measurements were not available. The optimum number of grid system was determined to be 372 horizontal cells and 10 vertical layers of the site for 1 year simulation of hydrodynamics and water quality out of iterative trials. Monthly observed BOD, TN, TP and Chl-a concentrations inside the lake were used for calibration of WASP7.3 model. This study shows that EFDC and WASP can be used in series successfully to improve accuracy in water quality modeling. However, it was observed that the amount of data to develop inflow water quality and flow rate boundary conditions and water quality data inside lake for calibration were not enough for accurate modeling. It is suggested that object-oriented data collection systems would be necessary to ensure accuracy of EFDC-WASP model application and thus for efficient lake water quality management strategy development.

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“…Seo *Corresponding author. [15,16]. On the other hand, Park et al [17] applied the full EFDC model in the modeling of Kwangyang Bay in Korea.…”

Section: Introductionmentioning

confidence: 97%

Application of three-dimensional hydrodynamics and water quality model of the Youngsan River, Korea

Seo

Song²

2014

Desalination and Water Treatment

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A B S T R A C TThere have been major changes in flow pattern in the Youngsan River due to construction in-stream structures including newly built Seungchon Weir and Juksan Weir in the middle of the river in addition to existing estuarine dam. Increased nutrient load from basin area has been a major cause of repetitive algal blooms in the river. And increased residence time due to the construction may affect growth dynamics of phytoplankton in the river. This paper reports the construction of a mathematical model to predict phytoplankton dynamics in the area for evaluation of various future management scenarios. The Environmental Fluid Dynamics Code model was chosen as a three-dimensional hydrodynamics and water quality model. Hydrodynamics model and water quality model were successfully calibrated using observed water level data and water quality data, respectively, in selected locations in the river. It is expected that the developed model can be successfully applied to select appropriate water quality management alternatives.

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3-D hydrodynamic modeling of Yongdam Lake, Korea using EFDC

Cited by 21 publications

References 1 publication

Assessment of Future Climate Change Impact on Water Quality of Chungju Lake, South Korea, Using WASP Coupled with SWAT

Assessment of Future Climate Change Impact on Water Quality of Chungju Lake, South Korea, Using WASP Coupled with SWAT

Application of EFDC and WASP7 in Series for Water Quality Modeling of the Yongdam Lake, Korea

Application of three-dimensional hydrodynamics and water quality model of the Youngsan River, Korea

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