TY - JOUR
T1 - Understanding thermal stratification and circulation dynamics in Fuxian Lake
T2 - Insights from EFDC simulation study
AU - Liu, Yingying
AU - He, Hongming
AU - Zhou, Jie
AU - Fan, Hongxiang
AU - Wu, Qinglong
AU - Delang, Claudio O.
N1 - We acknowledge with gratitude the research grants kindly provided by the Strategic Priority Science and Technology Program of The Chinese Academy of Sciences (No. XDA23020603), National Natural Science Foundation of China: (No. 42271007), The National Key Research and Development Program: (No. 2022YFF1302401), Comprehensive Scientific Investigation Program of the Gaoligong Mountain National Park in Yunnan Province.
Publisher Copyright:
© 2024 The Authors.
PY - 2024/8
Y1 - 2024/8
N2 - This study aims to provide a comprehensive numerical solution and quantitative analysis of the thermal stratification and circulation in Fuxian Lake, the largest freshwater deep lake in China, utilizing a high-fidelity Environmental Fluid Dynamics Code (EFDC) to build a three-dimensional hydrodynamic model. Simulation results reveal that meteorological conditions and hydrodynamic processes notably influence the spatiotemporal characteristics of the thermocline, with wind and temperature disparities primarily impacting water flow. Maximum water temperature (24.3 °C) and thermocline intensity (0.31 °C/m) typically occur in September. Vertical circulation, driven by wind-induced horizontal divergence and convergence of lake currents, often induces uneven vertical movements, leading to thermocline irregularities. This study also assesses the sensitivity of Fuxian Lake to temperature changes, showcasing the efficacy of EFDC model in accurately reproducing observed spatiotemporal variations. This research not only establishes a foundation for integrating the EFDC model with water quality models but also presents an effective approach for studying hydrodynamics and thermal stratification processes in other deep-water lakes, thereby facilitating lake management and ecological restoration endeavors.
AB - This study aims to provide a comprehensive numerical solution and quantitative analysis of the thermal stratification and circulation in Fuxian Lake, the largest freshwater deep lake in China, utilizing a high-fidelity Environmental Fluid Dynamics Code (EFDC) to build a three-dimensional hydrodynamic model. Simulation results reveal that meteorological conditions and hydrodynamic processes notably influence the spatiotemporal characteristics of the thermocline, with wind and temperature disparities primarily impacting water flow. Maximum water temperature (24.3 °C) and thermocline intensity (0.31 °C/m) typically occur in September. Vertical circulation, driven by wind-induced horizontal divergence and convergence of lake currents, often induces uneven vertical movements, leading to thermocline irregularities. This study also assesses the sensitivity of Fuxian Lake to temperature changes, showcasing the efficacy of EFDC model in accurately reproducing observed spatiotemporal variations. This research not only establishes a foundation for integrating the EFDC model with water quality models but also presents an effective approach for studying hydrodynamics and thermal stratification processes in other deep-water lakes, thereby facilitating lake management and ecological restoration endeavors.
KW - Hydrodynamic
KW - Thermal stratification and thermocline
KW - EFDC
KW - Fuxian Lake
UR - http://www.scopus.com/inward/record.url?scp=85195071437&partnerID=8YFLogxK
U2 - 10.1016/j.ecolind.2024.112202
DO - 10.1016/j.ecolind.2024.112202
M3 - Journal article
AN - SCOPUS:85195071437
SN - 1470-160X
VL - 165
JO - Ecological Indicators
JF - Ecological Indicators
M1 - 112202
ER -