Hydrodynamics-based modeling of phosphorus balance and dynamics in a large tropical floodplain
The development of a multidimensional phosphorus dynamic model for lake–floodplain systems is still limited due to its complex hydrodynamics and environmental processes, which constrains our understanding and environmental management on eutrophication. Therefore, we developed a horizontal two-dimens...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-04-01
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| Series: | Environmental Advances |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666765722000126 |
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| author | Vouchlay Theng Kana Hashimoto Sovannara Uk Tomohiro Tanaka Hidekazu Yoshioka Chihiro Yoshimura |
| author_facet | Vouchlay Theng Kana Hashimoto Sovannara Uk Tomohiro Tanaka Hidekazu Yoshioka Chihiro Yoshimura |
| author_sort | Vouchlay Theng |
| collection | DOAJ |
| description | The development of a multidimensional phosphorus dynamic model for lake–floodplain systems is still limited due to its complex hydrodynamics and environmental processes, which constrains our understanding and environmental management on eutrophication. Therefore, we developed a horizontal two-dimensional hydrodynamics-based phosphorus model and applied it to understand the phosphorus dynamics in the Tonle Sap Lake, a large tropical lake–floodplain system in Cambodia. This phosphorus dynamic model is based on a hydrodynamic model (local inertial model) and integrates the major phosphorus processes in the lake and the phosphorus inputs from tributaries and floating villages. The phosphorus dynamic model was applied to the period from September 1999 to December 2003 for elucidating the total phosphorus balance and the spatiotemporal distribution of its concentration. The model reproduced the seasonality of total phosphorus concentration with its root mean square error of 12 and 16 µg/L for the calibration and validation periods, respectively. During 1999–2003, the lake was in a mesotrophic to eutrophic state, whereas the average eutrophic area expanded from 8.0% in October to 45.3% in May, when the inundated area was reduced, due to a relatively high internal loading and the high concentration of tributary inputs. In addition, the model estimated that most of the external total phosphorus loading was settled down and the internal processes play an important role in phosphorus dynamics in the Tonle Sap Lake. As presented, the model analysis integrating hydrodynamics and internal processes substantially helps us understand the spatiotemporal dynamics of phosphorus in the lake–floodplain systems. |
| first_indexed | 2024-12-13T08:29:56Z |
| format | Article |
| id | doaj.art-7cf777784c58439c9645edd47ca25c61 |
| institution | Directory Open Access Journal |
| issn | 2666-7657 |
| language | English |
| last_indexed | 2024-12-13T08:29:56Z |
| publishDate | 2022-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Environmental Advances |
| spelling | doaj.art-7cf777784c58439c9645edd47ca25c612022-12-21T23:53:47ZengElsevierEnvironmental Advances2666-76572022-04-017100176Hydrodynamics-based modeling of phosphorus balance and dynamics in a large tropical floodplainVouchlay Theng0Kana Hashimoto1Sovannara Uk2Tomohiro Tanaka3Hidekazu Yoshioka4Chihiro Yoshimura5School of Environment and Society, Tokyo Institute of Technology, 2-12-1-M1-4, Meguro-ku, Ookayama, Tokyo 152-8552, Japan; Faculty of Hydrology and Water Resources Engineering, Institute of Technology of Cambodia, CambodiaSchool of Environment and Society, Tokyo Institute of Technology, 2-12-1-M1-4, Meguro-ku, Ookayama, Tokyo 152-8552, JapanSchool of Environment and Society, Tokyo Institute of Technology, 2-12-1-M1-4, Meguro-ku, Ookayama, Tokyo 152-8552, JapanGraduate School of Global Environmental Studies, Kyoto University, JapanGraduate School of Natural Science and Technology, Shimane University, JapanSchool of Environment and Society, Tokyo Institute of Technology, 2-12-1-M1-4, Meguro-ku, Ookayama, Tokyo 152-8552, Japan; Corresponding author.The development of a multidimensional phosphorus dynamic model for lake–floodplain systems is still limited due to its complex hydrodynamics and environmental processes, which constrains our understanding and environmental management on eutrophication. Therefore, we developed a horizontal two-dimensional hydrodynamics-based phosphorus model and applied it to understand the phosphorus dynamics in the Tonle Sap Lake, a large tropical lake–floodplain system in Cambodia. This phosphorus dynamic model is based on a hydrodynamic model (local inertial model) and integrates the major phosphorus processes in the lake and the phosphorus inputs from tributaries and floating villages. The phosphorus dynamic model was applied to the period from September 1999 to December 2003 for elucidating the total phosphorus balance and the spatiotemporal distribution of its concentration. The model reproduced the seasonality of total phosphorus concentration with its root mean square error of 12 and 16 µg/L for the calibration and validation periods, respectively. During 1999–2003, the lake was in a mesotrophic to eutrophic state, whereas the average eutrophic area expanded from 8.0% in October to 45.3% in May, when the inundated area was reduced, due to a relatively high internal loading and the high concentration of tributary inputs. In addition, the model estimated that most of the external total phosphorus loading was settled down and the internal processes play an important role in phosphorus dynamics in the Tonle Sap Lake. As presented, the model analysis integrating hydrodynamics and internal processes substantially helps us understand the spatiotemporal dynamics of phosphorus in the lake–floodplain systems.http://www.sciencedirect.com/science/article/pii/S2666765722000126Floating villageLake–floodplain systemPhosphorus dynamicsReversal flowTonle Sap Lake |
| spellingShingle | Vouchlay Theng Kana Hashimoto Sovannara Uk Tomohiro Tanaka Hidekazu Yoshioka Chihiro Yoshimura Hydrodynamics-based modeling of phosphorus balance and dynamics in a large tropical floodplain Environmental Advances Floating village Lake–floodplain system Phosphorus dynamics Reversal flow Tonle Sap Lake |
| title | Hydrodynamics-based modeling of phosphorus balance and dynamics in a large tropical floodplain |
| title_full | Hydrodynamics-based modeling of phosphorus balance and dynamics in a large tropical floodplain |
| title_fullStr | Hydrodynamics-based modeling of phosphorus balance and dynamics in a large tropical floodplain |
| title_full_unstemmed | Hydrodynamics-based modeling of phosphorus balance and dynamics in a large tropical floodplain |
| title_short | Hydrodynamics-based modeling of phosphorus balance and dynamics in a large tropical floodplain |
| title_sort | hydrodynamics based modeling of phosphorus balance and dynamics in a large tropical floodplain |
| topic | Floating village Lake–floodplain system Phosphorus dynamics Reversal flow Tonle Sap Lake |
| url | http://www.sciencedirect.com/science/article/pii/S2666765722000126 |
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