New evidence of high-magnitude Holocene floods in the Purlung Tsangpo River, southeastern Tibetan Plateau
文献类型:期刊论文
作者 | Wang, Hao4; Cui, Peng1,3,4; Yang, Anna2,4; Tang, Jinbo4; Wen, Shusong4; Yang, Zewen2,4; Zhou, Liqin2,4; Liu, Weiming3,4; Bazai, Nazir Ahmed3,4 |
刊名 | CATENA |
出版日期 | 2023-12-01 |
卷号 | 233页码:15 |
ISSN号 | 0341-8162 |
关键词 | Purlung Tsangpo Flood deposits Step-backwater Discharge reconstruction Climate optima |
DOI | 10.1016/j.catena.2023.107516 |
英文摘要 | Catastrophic flood events are the most devastating natural hazard in the world, and direct human observation or instrumental/systematic measurement cannot capture the full range of their frequency-magnitudes. It is essential to reconstruct large-magnitude, rare floods that are recorded in landforms and sediments. Recently, palaeohydrology studies associated with Holocene palaeofloods in Himalayan rivers have been gaining attention. Exceptional Holocene outburst floods have been invoked as a highly efficient erosion agent contributing to the rapid incision of the Tsangpo Gorge. Despite its significance, palaeoflood records upstream of Tsangpo Gorge have rarely been explored. This study presents a series of flood deposits consisting of laminated silt and sand or repeated cross-bedding sets, which points to high-magnitude flood. Inverse hydraulic modelling of the step-backwater method based on HEC-RAS software was applied to acquire the water surface profile under varying peak discharge scenarios. The discharges of palaeofloods were estimated by relating elevations of flood features to water surface profiles calculated for the reach. The result provides a minimum estimate of the peak discharge of approximately 3.70 x 10(4) m(3)/s with a maximal depth of up to 47 m. The overestimation of the peak discharge due to post-event channel incision is up to 3000 m(3)/s. Seven charcoal C-14 dates give a narrow age range between 2.2 and 2.6 ka cal BP. This flood occurred only a few hundred years after a period of climate transition at similar to 3 ka BP, which was prone to hydrological extremes. Since the reconstructed palaeodischarge is significantly beyond the scope of either rainfall floods or glacial lake outburst floods, it can be inferred that the breaching of an upstream landslide dam is the most reasonable origin. |
WOS关键词 | RADIOCARBON AGE CALIBRATION ; PAST HYDROLOGICAL EVENTS ; PALEOFLOOD HYDROLOGY ; DAMMED LAKE ; SLACKWATER DEPOSITS ; TERRACE FORMATION ; LATE QUATERNARY ; HANJIANG RIVER ; CLIMATE-CHANGE ; ASIAN MONSOON |
资助项目 | National Natural Science Foundation of China[41941017] ; National Natural Science Foundation of China[42101083] ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP)[2019QZKK0906] ; Sichuan Province Science and Technology Support Program[2021YFH0009] |
WOS研究方向 | Geology ; Agriculture ; Water Resources |
语种 | 英语 |
出版者 | ELSEVIER |
WOS记录号 | WOS:001165273500001 |
资助机构 | National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Sichuan Province Science and Technology Support Program |
源URL | [http://ir.imde.ac.cn/handle/131551/57881] |
专题 | 成都山地灾害与环境研究所_山地灾害与地表过程重点实验室 |
通讯作者 | Cui, Peng |
作者单位 | 1.189,QunXianNan St, Chengdu 100101, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100149, Peoples R China 3.CAS HEC, China Pakistan Joint Res Ctr Earth Sci, Islamabad 45320, Pakistan 4.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China |
推荐引用方式 GB/T 7714 | Wang, Hao,Cui, Peng,Yang, Anna,et al. New evidence of high-magnitude Holocene floods in the Purlung Tsangpo River, southeastern Tibetan Plateau[J]. CATENA,2023,233:15. |
APA | Wang, Hao.,Cui, Peng.,Yang, Anna.,Tang, Jinbo.,Wen, Shusong.,...&Bazai, Nazir Ahmed.(2023).New evidence of high-magnitude Holocene floods in the Purlung Tsangpo River, southeastern Tibetan Plateau.CATENA,233,15. |
MLA | Wang, Hao,et al."New evidence of high-magnitude Holocene floods in the Purlung Tsangpo River, southeastern Tibetan Plateau".CATENA 233(2023):15. |
入库方式: OAI收割
来源:成都山地灾害与环境研究所
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