Spatial and temporal variation of nearshore significant wave height in the Three Gorges Reservoir, China
The study of wave characteristic changes is critical for understanding the role of wave erosion in the shoreline erosion of reservoirs and its subsequent impact on environmental pollution. This study utilizes RBRvirtuoso D-wave-pressure-based wave gauges to make in situ observations of the nearshore...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-07-01
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| Series: | Ecological Indicators |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1470160X23004855 |
| _version_ | 1827943640711823360 |
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| author | Hangyu Xie Jiaorong Lyu Yuhai Bao Yantong Yu Yu Li Xiaolan Zheng Xiubin He |
| author_facet | Hangyu Xie Jiaorong Lyu Yuhai Bao Yantong Yu Yu Li Xiaolan Zheng Xiubin He |
| author_sort | Hangyu Xie |
| collection | DOAJ |
| description | The study of wave characteristic changes is critical for understanding the role of wave erosion in the shoreline erosion of reservoirs and its subsequent impact on environmental pollution. This study utilizes RBRvirtuoso D-wave-pressure-based wave gauges to make in situ observations of the nearshore significant wave height (SWH) in the Three Gorges Reservoir. The differential and impact factors affecting the SWH under varying water levels, in the main and tributary streams, and shoreline sections are analyzed. This research also investigates the alteration of the frequency distribution of the SWH. The findings indicate that the average SWH increases as the water level increases, reaching 1.2 cm, 1.5 cm, and 1.9 cm for water levels of 150 m, 165 m, and 175 m, respectively, with a SWH frequency distribution curve that becomes increasingly smooth. The average SWH in the mainstream is 2.9 times larger than that in the tributaries, with the former having a smoother frequency distribution curve. The average SWHs in different shoreline sections are inconsistent at the same water level, with the Badong (downstream) section near the Three Gorges Dam exhibiting a significantly higher average SWH than the Zhongxian (midstream) section further from the dam. When shipping activities intensify, there is often a marked increase in the magnitude of the SWH. The SWH in narrower reservoir sections is significantly greater than that in wider sections, with average measurements of 2.2 cm and 1.4 cm, respectively. Fluctuations of the water level, shipping activities, and other factors in the Three Gorges Reservoir have a significant impact on the alteration of the nearshore SWH, and changes in the SWH from low to high water levels may result in changes in both the spatial and temporal patterns of shoreline erosion. These alterations can, in turn, affect sediment and nutrient transport, potentially exacerbating environmental pollution issues. |
| first_indexed | 2024-03-13T10:18:26Z |
| format | Article |
| id | doaj.art-14b0542073314881be1820d88d0b9c74 |
| institution | Directory Open Access Journal |
| issn | 1470-160X |
| language | English |
| last_indexed | 2024-03-13T10:18:26Z |
| publishDate | 2023-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ecological Indicators |
| spelling | doaj.art-14b0542073314881be1820d88d0b9c742023-05-21T04:34:33ZengElsevierEcological Indicators1470-160X2023-07-01151110343Spatial and temporal variation of nearshore significant wave height in the Three Gorges Reservoir, ChinaHangyu Xie0Jiaorong Lyu1Yuhai Bao2Yantong Yu3Yu Li4Xiaolan Zheng5Xiubin He6Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610299, China; University of Chinese Academy of Sciences, Beijing 100049, ChinaKey Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610299, ChinaKey Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610299, China; Corresponding author at: Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, No.189, South Qunxian Road, Shuangliu District, Chengdu 610299, China.Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610299, China; University of Chinese Academy of Sciences, Beijing 100049, ChinaKey Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610299, China; University of Chinese Academy of Sciences, Beijing 100049, ChinaKey Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610299, China; University of Chinese Academy of Sciences, Beijing 100049, ChinaKey Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610299, ChinaThe study of wave characteristic changes is critical for understanding the role of wave erosion in the shoreline erosion of reservoirs and its subsequent impact on environmental pollution. This study utilizes RBRvirtuoso D-wave-pressure-based wave gauges to make in situ observations of the nearshore significant wave height (SWH) in the Three Gorges Reservoir. The differential and impact factors affecting the SWH under varying water levels, in the main and tributary streams, and shoreline sections are analyzed. This research also investigates the alteration of the frequency distribution of the SWH. The findings indicate that the average SWH increases as the water level increases, reaching 1.2 cm, 1.5 cm, and 1.9 cm for water levels of 150 m, 165 m, and 175 m, respectively, with a SWH frequency distribution curve that becomes increasingly smooth. The average SWH in the mainstream is 2.9 times larger than that in the tributaries, with the former having a smoother frequency distribution curve. The average SWHs in different shoreline sections are inconsistent at the same water level, with the Badong (downstream) section near the Three Gorges Dam exhibiting a significantly higher average SWH than the Zhongxian (midstream) section further from the dam. When shipping activities intensify, there is often a marked increase in the magnitude of the SWH. The SWH in narrower reservoir sections is significantly greater than that in wider sections, with average measurements of 2.2 cm and 1.4 cm, respectively. Fluctuations of the water level, shipping activities, and other factors in the Three Gorges Reservoir have a significant impact on the alteration of the nearshore SWH, and changes in the SWH from low to high water levels may result in changes in both the spatial and temporal patterns of shoreline erosion. These alterations can, in turn, affect sediment and nutrient transport, potentially exacerbating environmental pollution issues.http://www.sciencedirect.com/science/article/pii/S1470160X23004855Nearshore wavesSignificant wave height (SWH)Three Gorges ReservoirWave erosion |
| spellingShingle | Hangyu Xie Jiaorong Lyu Yuhai Bao Yantong Yu Yu Li Xiaolan Zheng Xiubin He Spatial and temporal variation of nearshore significant wave height in the Three Gorges Reservoir, China Ecological Indicators Nearshore waves Significant wave height (SWH) Three Gorges Reservoir Wave erosion |
| title | Spatial and temporal variation of nearshore significant wave height in the Three Gorges Reservoir, China |
| title_full | Spatial and temporal variation of nearshore significant wave height in the Three Gorges Reservoir, China |
| title_fullStr | Spatial and temporal variation of nearshore significant wave height in the Three Gorges Reservoir, China |
| title_full_unstemmed | Spatial and temporal variation of nearshore significant wave height in the Three Gorges Reservoir, China |
| title_short | Spatial and temporal variation of nearshore significant wave height in the Three Gorges Reservoir, China |
| title_sort | spatial and temporal variation of nearshore significant wave height in the three gorges reservoir china |
| topic | Nearshore waves Significant wave height (SWH) Three Gorges Reservoir Wave erosion |
| url | http://www.sciencedirect.com/science/article/pii/S1470160X23004855 |
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