Two megafloods in the middle reach of Yarlung Tsangpo River since Last-glacial period: Evidence from giant bars
文献类型：期刊论文
| 作者 | Yang, Anna2,3,5; Wang, Hao4,5; Liu, Weiming2,3,5; Hu, Kaiheng2,5; Liu, Dingzhu4,5; Wu, Chaohua6; Hu, Xudong1 |
| 刊名 | GLOBAL AND PLANETARY CHANGE
 |
| 出版日期 | 2022 |
| 卷号 | 208页码:18 |
| 关键词 | Gravel bars Megaflood Optically stimulated luminescence dating Paleohydrology |
| ISSN号 | 0921-8181 |
| DOI | 10.1016/j.gloplacha.2021.103726 |
| 通讯作者 | Liu, Weiming(liuwm@imde.ac.cn) ; Hu, Kaiheng(khhu@imde.ac.cn) |
| 英文摘要 | Megafloods in the Yarlung Tsangpo River have long been recognized as a major agent causing regional geomorphic change of the Namche Barwa. Here we present a well-constrained record of catastrophic outburst flood history in the middle reach of the river. The detailed sedimentological analysis of seven giant bars provides reliable evidences at least two paleofloods, which are consistent with the results obtained by optically stimulated luminescence dating and one-dimensional hydraulic simulation. Flood units with similar reconstructed peak discharges and ages have been assumed to represent the same flood. According to the timing analysis, the largest observed flood event (megaflood I) of 1.0 x 10(6) m(3)/s is dated, via Optically stimulated luminescence (OSL) dating on the three giant bars, as occurring between 12.06 +/- 1.01 ka and 11.05 +/- 0.90 ka. Megaflood II, dated via OSL dating of a giant bar, occurred between 4.96 +/- 0.38 ka and 3.20 +/- 0.24 ka, which was fitted consistently to a peak discharge of 0.3 x 10(6) m(3)/s. A number of subordinate and unrecorded large floods may also have occurred. The study revealed that failure of the Jiedexiu dammed lake causes megaflood I, and megaflood II might have influenced activity of prehistoric humans in the late Neolithic age. Our study identifies new sources for the previously studied megafloods, which could further explain the focused erosion in the steep topography of the Yarlung Tsangpo Grand Canyon. |
| WOS关键词 | LAKE OUTBURST FLOODS ; LATE PLEISTOCENE ; TIBETAN PLATEAU ; DAMMED LAKE ; LUMINESCENCE CHRONOLOGY ; QUATERNARY GLACIATION ; PALEOFLOOD HYDROLOGY ; ALTAI MOUNTAINS ; VERDE RIVER ; DEPOSITS |
| 资助项目 | Second Tibetan Plateau Scientific Expedition and Research Program (STEP)[2019QZKK0903] ; National Natural Science Foundation of China[91747207] ; National Natural Science Foundation of China[42071017] ; National Natural Science Foundation of China[41807448] |
| WOS研究方向 | Physical Geography ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000740473200001 |
| 出版者 | ELSEVIER |
| 资助机构 | Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; National Natural Science Foundation of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/169411]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Liu, Weiming; Hu, Kaiheng |
| 作者单位 | 1.China Three Gorges Univ, Yichang 443000, Peoples R China 2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China 3.China Pakistan Joint Res Ctr Earth Sci, Islamabad 30001, Pakistan 4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100039, Peoples R China 6.Chengdu Univ Informat & Technol, Coll Software Engn, Chengdu 610225, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Anna,Wang, Hao,Liu, Weiming,et al. Two megafloods in the middle reach of Yarlung Tsangpo River since Last-glacial period: Evidence from giant bars[J]. GLOBAL AND PLANETARY CHANGE,2022,208:18. |
| APA | Yang, Anna.,Wang, Hao.,Liu, Weiming.,Hu, Kaiheng.,Liu, Dingzhu.,...&Hu, Xudong.(2022).Two megafloods in the middle reach of Yarlung Tsangpo River since Last-glacial period: Evidence from giant bars.GLOBAL AND PLANETARY CHANGE,208,18. |
| MLA | Yang, Anna,et al."Two megafloods in the middle reach of Yarlung Tsangpo River since Last-glacial period: Evidence from giant bars".GLOBAL AND PLANETARY CHANGE 208(2022):18. |
入库方式： OAI收割
来源：地理科学与资源研究所
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