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Longitudinal-vertical hydrodynamic and turbidity simulations for prediction of dam reconstruction effects in Asian monsoon area

Title
Longitudinal-vertical hydrodynamic and turbidity simulations for prediction of dam reconstruction effects in Asian monsoon area
Authors
Choi J.H.Jeong S.-A.Park S.S.
Ewha Authors
박석순최정현
SCOPUS Author ID
박석순scopus; 최정현scopus
Issue Date
2007
Journal Title
Journal of the American Water Resources Association
ISSN
1093-474XJCR Link
Citation
vol. 43, no. 6, pp. 1444 - 1454
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
This research investigates possible impacts of enlarged water body according to dam reconstruction on the hydrodynamics and water quality of the reservoir using a laterally averaged, two-dimensional hydrodynamic and transport model, CE-QUAL-W2. The lake was formed by the artificial dam in 1983 for agricultural water supply and is currently under consideration of reconstruction so as to expand the volume of reservoir for flood control as well as water supply in downstream areas. To calibrate and validate the model, field-collected data were compared with model predictions for water level fluctuations and water temperature during the years of 2001 (from January to December) and 2003 (from March to November). The model results showed a good agreement with field measurements both in calibration and verification. Utilizing the model, impacts of dam reconstruction on the thermal hydrodynamics and turbid current were predicted. From the model results, dam reconstruction limited the depth of thermal stratification below 10 meter and formed steep temperature gradient between epilimnion and hypolimnion. The restricted thermal stratification persisted up to the end of September. This result indicated that thermal stratification would become stronger during summer and stay longer after dam reconstruction. In addition, the restricted thermal stratification caused vertical circulation of water mixing lower than 10 meter and isolated the upper water layer from the lower water layer which increased the volume of hypolimnetic water with low temperature. The vertical circulation near the surface also mitigated propagation of density plume within the depth of 10 m which would remain the hypolimnetic water clean. © 2007 American Water Resources Association.
DOI
10.1111/j.1752-1688.2007.00120.x
Appears in Collections:
엘텍공과대학 > 환경공학전공 > Journal papers
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