Water Temperature Simulation in a Tropical Lake in South China
To study the vertical water temperature structure and thermodynamic characteristics of tropical lake-like reservoirs, a water temperature model was developed by a vertical one-dimensional numerical model for Songtao Reservoir in Hainan Province, China. The model was verified by the measured water te...
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| Format: | Article |
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MDPI AG
2021-03-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/13/7/913 |
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| author | Hongbin Gu Baohong Lu Changjun Qi Si Xiong Wenlong Shen Lejun Ma |
| author_facet | Hongbin Gu Baohong Lu Changjun Qi Si Xiong Wenlong Shen Lejun Ma |
| author_sort | Hongbin Gu |
| collection | DOAJ |
| description | To study the vertical water temperature structure and thermodynamic characteristics of tropical lake-like reservoirs, a water temperature model was developed by a vertical one-dimensional numerical model for Songtao Reservoir in Hainan Province, China. The model was verified by the measured water temperature data, and sensitivity analysis of key model parameters was carried out. The results show that water temperature simulated by the model in Songtao Reservoir agreed with the observations quite well, and the model is feasible for water temperature simulations in large reservoirs in tropical zones. The sensitivity of vertical water temperature structure to different model parameters varied. For example, the extinction coefficient greatly affected surface water temperature, which is important for the formation and development of the surface water temperature hybrid layer. The vertical mixing coefficient significantly influenced the inflection point position and thickness of the thermocline. The vertical water temperature structure in Songtao Reservoir was stratified. Reservoir surface water temperature varied from 19.4 °C to 33.8 °C throughout a year. The hypolimnion mainly appeared in elevation below 150 m, where the water temperature is basically maintained at 19 °C throughout the year. This study also found that the surface water temperature of Songtao Reservoir in the tropical zone was higher than the air temperature throughout a year, with an annual average of 3.5 °C higher than that of air temperature. The preliminary analysis found out that the higher surface water temperature may be caused by the strong air temperature and solar radiation in tropical zones, in addition to the enhanced capacity of heat absorption and heat storage due to the slow water flow in the reservoir. |
| first_indexed | 2024-03-10T12:51:34Z |
| format | Article |
| id | doaj.art-b2bbd3b0936e4ddeb926b98d9609bcb7 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-10T12:51:34Z |
| publishDate | 2021-03-01 |
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| series | Water |
| spelling | doaj.art-b2bbd3b0936e4ddeb926b98d9609bcb72023-11-21T13:02:46ZengMDPI AGWater2073-44412021-03-0113791310.3390/w13070913Water Temperature Simulation in a Tropical Lake in South ChinaHongbin Gu0Baohong Lu1Changjun Qi2Si Xiong3Wenlong Shen4Lejun Ma5College of Hydrology and Water Resources, Hohai University, Nanjing 210098, ChinaCollege of Hydrology and Water Resources, Hohai University, Nanjing 210098, ChinaCollege of Hydrology and Water Resources, Hohai University, Nanjing 210098, ChinaJiangxi Provincial Water Conservancy Planning Design and Research Institute, Nanchang 330029, ChinaCollege of Hydrology and Water Resources, Hohai University, Nanjing 210098, ChinaJinling Institute of Technology, Nanjing 211169, ChinaTo study the vertical water temperature structure and thermodynamic characteristics of tropical lake-like reservoirs, a water temperature model was developed by a vertical one-dimensional numerical model for Songtao Reservoir in Hainan Province, China. The model was verified by the measured water temperature data, and sensitivity analysis of key model parameters was carried out. The results show that water temperature simulated by the model in Songtao Reservoir agreed with the observations quite well, and the model is feasible for water temperature simulations in large reservoirs in tropical zones. The sensitivity of vertical water temperature structure to different model parameters varied. For example, the extinction coefficient greatly affected surface water temperature, which is important for the formation and development of the surface water temperature hybrid layer. The vertical mixing coefficient significantly influenced the inflection point position and thickness of the thermocline. The vertical water temperature structure in Songtao Reservoir was stratified. Reservoir surface water temperature varied from 19.4 °C to 33.8 °C throughout a year. The hypolimnion mainly appeared in elevation below 150 m, where the water temperature is basically maintained at 19 °C throughout the year. This study also found that the surface water temperature of Songtao Reservoir in the tropical zone was higher than the air temperature throughout a year, with an annual average of 3.5 °C higher than that of air temperature. The preliminary analysis found out that the higher surface water temperature may be caused by the strong air temperature and solar radiation in tropical zones, in addition to the enhanced capacity of heat absorption and heat storage due to the slow water flow in the reservoir.https://www.mdpi.com/2073-4441/13/7/913tropical zonelake-like reservoirvertical one-dimensional numerical modelvertical water temperature structure |
| spellingShingle | Hongbin Gu Baohong Lu Changjun Qi Si Xiong Wenlong Shen Lejun Ma Water Temperature Simulation in a Tropical Lake in South China Water tropical zone lake-like reservoir vertical one-dimensional numerical model vertical water temperature structure |
| title | Water Temperature Simulation in a Tropical Lake in South China |
| title_full | Water Temperature Simulation in a Tropical Lake in South China |
| title_fullStr | Water Temperature Simulation in a Tropical Lake in South China |
| title_full_unstemmed | Water Temperature Simulation in a Tropical Lake in South China |
| title_short | Water Temperature Simulation in a Tropical Lake in South China |
| title_sort | water temperature simulation in a tropical lake in south china |
| topic | tropical zone lake-like reservoir vertical one-dimensional numerical model vertical water temperature structure |
| url | https://www.mdpi.com/2073-4441/13/7/913 |
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