Dynamics of Mid-Channel Bar during Different Impoundment Periods of the Three Gorges Reservoir Area in China
文献类型：期刊论文
| 作者 | Tang, Qingqing1,2,3; Tan, Daming4; Ji, Yongyue2,3; Yan, Lingyun2,3; Zeng, Sidong2; Chen, Qiao2,3 ; Wu, Shengjun2,3; Chen, Jilong2,3
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| 刊名 | WATER
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| 出版日期 | 2021-12-01 |
| 卷号 | 13期号:23页码:16 |
| 关键词 | mid-channel bars morphological change spatial distribution different impoundment periods Three Gorges Reservoir |
| DOI | 10.3390/w13233427 |
| 通讯作者 | Chen, Jilong(cjl47168@163.com) |
| 英文摘要 | The dynamics of the mid-channel bars (MCBs) in the Three Gorges Reservoir (TGR) were substantially impacted by the large water-level changes due to the impoundments of the TGR. However, it is still not clear how the morphology of the MCBs changed under the influence of water level and hydrological regime changes induced by the impoundments and operation of the TGR. In this work, the MCBs in the TGR were retrieved using Landsat remote sensing images from 1989 to 2019, and the spatio-temporal variations in the number, area, morphology and location of the MCBs during different impoundment periods were investigated. The results showed that the number and area of MCBs changed dramatically with water-level changes, and the changes were dominated by MCBs with an area less than 0.03 km(2) and larger than 1 km(2). The area of MCBs decreased progressively with the rising water level, and the number generally showed a decreasing trend, with the minimum number occurring at the third stage when the water level reached 139 m, resulting in the maximum average area at this period. The ratio of length to width of the MCBs generally decreased with the changes in hydrological and sediment regimes, leading to a shape adjustment from narrow-long to relatively short-round with the rising of the water level. The water impoundments of the TGR led to the migration of the dominant area from the upper section to the middle section of the TGR and resulted in a more even distribution of MCBs in the TGR. The results improve our understanding of the mechanisms of the development of MCBs in the TGR under the influence of water impoundment coupled with the annually cyclic hydrological regime and longer periods of inundation and exposure. |
| 资助项目 | Youth Innovation Promotion Association[2018417] ; Youth Innovation Promotion Association[2021385] ; National Natural Science Foundation of China[41901130] ; National Natural Science Foundation of China[42061015] ; Chinese Academy of Sciences[XDA23040500] ; Chongqing Science and Technology project[cstc2019jscx-dxwtBX0007] ; Chongqing Science and Technology project[cstc2021jcyj-msxmX0187] ; Chongqing Municipal Bureau of Water Resources[5000002021BF40001] ; Institute of Agricultural Resources and Environment, Tibet Academy of Agricultural and Animal Husbandry Science[2020ZZKT-01] |
| WOS研究方向 | Environmental Sciences & Ecology ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000743310500001 |
| 出版者 | MDPI |
| 源URL | [http://119.78.100.138/handle/2HOD01W0/15353]  |
| 专题 | 中国科学院重庆绿色智能技术研究院 |
| 通讯作者 | Chen, Jilong |
| 作者单位 | 1.Chongqing Jiaotong Univ, Sch Architecture & Urban Planning, Chongqing 400074, Peoples R China 2.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China 3.Chinese Acad Sci, Key Lab Reservoir Aquat Environm, Chongqing 400714, Peoples R China 4.Tibet Acad Agr & Anim, Inst Agr Resources & Environm, Husb Sci, Lhasa 850000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Tang, Qingqing,Tan, Daming,Ji, Yongyue,et al. Dynamics of Mid-Channel Bar during Different Impoundment Periods of the Three Gorges Reservoir Area in China[J]. WATER,2021,13(23):16. |
| APA | Tang, Qingqing.,Tan, Daming.,Ji, Yongyue.,Yan, Lingyun.,Zeng, Sidong.,...&Chen, Jilong.(2021).Dynamics of Mid-Channel Bar during Different Impoundment Periods of the Three Gorges Reservoir Area in China.WATER,13(23),16. |
| MLA | Tang, Qingqing,et al."Dynamics of Mid-Channel Bar during Different Impoundment Periods of the Three Gorges Reservoir Area in China".WATER 13.23(2021):16. |
入库方式： OAI收割
来源：重庆绿色智能技术研究院
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