An Analysis of the Periodic Evolution of the Jingjiang Sandbank in the Tidal Reach of the Yangtze River
The Jingjiang Sandbank (JJS) is located on the bank of the tidal reach in the Yangtze River. It experiences a periodic evolution process of increase, split, migration, and dissipation, which affects the current direction, fish habitat, navigation safety, etc. In this paper, the periodic evolution of...
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MDPI AG
2020-06-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/12/6/1652 |
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| author | Ying Hu Minxiong Cao Aixing Ma Xiping Dou Yuncheng Wen |
| author_facet | Ying Hu Minxiong Cao Aixing Ma Xiping Dou Yuncheng Wen |
| author_sort | Ying Hu |
| collection | DOAJ |
| description | The Jingjiang Sandbank (JJS) is located on the bank of the tidal reach in the Yangtze River. It experiences a periodic evolution process of increase, split, migration, and dissipation, which affects the current direction, fish habitat, navigation safety, etc. In this paper, the periodic evolution of the JJS is investigated based on 17 field bathymetric measurements of the river from 1999 to 2017. Firstly, six cycles of the evolution process of the sandbank are described, and the evolution pattern of the split detached bar and the main body of the sandbank are analyzed according to the migration tracks of the detached bars and the historical volume-change of the JJS, respectively. Then an empirical orthogonal function (EOF) is conducted on the historical measurements of the bathymetry. The first four eigenfunctions correspond to the time-averaged bathymetry, the long-term change of the pattern of bathymetry, the periodic change of the JJS, and the downstream migration of the split detached bar, and the periodic change of the rip at the back of JJS. It is pointed out that the construction of two waterway regulation projects might have changed the evolution pattern of the JJS permanently. |
| first_indexed | 2024-03-10T19:17:30Z |
| format | Article |
| id | doaj.art-f5d68b9f5fc34ea49e6d38f54b45982c |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-10T19:17:30Z |
| publishDate | 2020-06-01 |
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| series | Water |
| spelling | doaj.art-f5d68b9f5fc34ea49e6d38f54b45982c2023-11-20T03:19:32ZengMDPI AGWater2073-44412020-06-01126165210.3390/w12061652An Analysis of the Periodic Evolution of the Jingjiang Sandbank in the Tidal Reach of the Yangtze RiverYing Hu0Minxiong Cao1Aixing Ma2Xiping Dou3Yuncheng Wen4River and Harbor Engineering Department, Nanjing Hydraulic Research Institute, Nanjing 210029, ChinaRiver and Harbor Engineering Department, Nanjing Hydraulic Research Institute, Nanjing 210029, ChinaRiver and Harbor Engineering Department, Nanjing Hydraulic Research Institute, Nanjing 210029, ChinaRiver and Harbor Engineering Department, Nanjing Hydraulic Research Institute, Nanjing 210029, ChinaRiver and Harbor Engineering Department, Nanjing Hydraulic Research Institute, Nanjing 210029, ChinaThe Jingjiang Sandbank (JJS) is located on the bank of the tidal reach in the Yangtze River. It experiences a periodic evolution process of increase, split, migration, and dissipation, which affects the current direction, fish habitat, navigation safety, etc. In this paper, the periodic evolution of the JJS is investigated based on 17 field bathymetric measurements of the river from 1999 to 2017. Firstly, six cycles of the evolution process of the sandbank are described, and the evolution pattern of the split detached bar and the main body of the sandbank are analyzed according to the migration tracks of the detached bars and the historical volume-change of the JJS, respectively. Then an empirical orthogonal function (EOF) is conducted on the historical measurements of the bathymetry. The first four eigenfunctions correspond to the time-averaged bathymetry, the long-term change of the pattern of bathymetry, the periodic change of the JJS, and the downstream migration of the split detached bar, and the periodic change of the rip at the back of JJS. It is pointed out that the construction of two waterway regulation projects might have changed the evolution pattern of the JJS permanently.https://www.mdpi.com/2073-4441/12/6/1652sandbankmulti-branching rivertidal reachEmpirical Orthogonal Functionshuman projects |
| spellingShingle | Ying Hu Minxiong Cao Aixing Ma Xiping Dou Yuncheng Wen An Analysis of the Periodic Evolution of the Jingjiang Sandbank in the Tidal Reach of the Yangtze River Water sandbank multi-branching river tidal reach Empirical Orthogonal Functions human projects |
| title | An Analysis of the Periodic Evolution of the Jingjiang Sandbank in the Tidal Reach of the Yangtze River |
| title_full | An Analysis of the Periodic Evolution of the Jingjiang Sandbank in the Tidal Reach of the Yangtze River |
| title_fullStr | An Analysis of the Periodic Evolution of the Jingjiang Sandbank in the Tidal Reach of the Yangtze River |
| title_full_unstemmed | An Analysis of the Periodic Evolution of the Jingjiang Sandbank in the Tidal Reach of the Yangtze River |
| title_short | An Analysis of the Periodic Evolution of the Jingjiang Sandbank in the Tidal Reach of the Yangtze River |
| title_sort | analysis of the periodic evolution of the jingjiang sandbank in the tidal reach of the yangtze river |
| topic | sandbank multi-branching river tidal reach Empirical Orthogonal Functions human projects |
| url | https://www.mdpi.com/2073-4441/12/6/1652 |
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