Channel Evolution Triggered by Large Flash Flood at an Earthquake-Affected Catchment
文献类型：期刊论文
| 作者 | Jin, Wen3,4; Wang, Hao1,2; Zhang, Guotao1; Liu, Dingzhu1; Wang, Jiao2,3 |
| 刊名 | REMOTE SENSING
 |
| 出版日期 | 2022-12-01 |
| 卷号 | 14期号:23页码:20 |
| 关键词 | channel change flash flood sUAV post-Wenchuan earthquake |
| DOI | 10.3390/rs14236060 |
| 通讯作者 | Zhang, Guotao(zhangguotao@igsnrr.ac.cn) |
| 英文摘要 | Earthquakes-induced landslides generally provide abundant loose materials at hillslopes, possibly triggering morphological reshaping processes at river channels and riverbeds during the large flash flood hydrograph and bringing huge risk downstream. Therefore, in a Wenchuan earthquake-affected catchment, the collected hydro-meteorological data and high-precision small Unmanned Aerial Vehicle (sUAV) data were used to quantitatively analyze channel evolution by a large flash flood event on 25 and 26 June 2018. It was found that the stable riverbed structure formed by the armour layer appeared in the tenth year after the Wenchuan earthquake. In a confined channel, the layer can protect the channel and resist the drastic change after the flash flood event with only a small bed elevation from 0.2 m to 2 m. Without the protection of the armour, the change could reach 6 m in the unconfined channel. Meanwhile, more materials with a deposition volume of about 7450 m(3) from tributaries were generally taken to the main channel, and more intense erosion with a volume of 10(5) m(3) mostly occurred downstream of tributaries. It was noted that, in the cross-section, the increased channel width could lead to a significant change with the large volume of 35 m(3). Additionally, a conceptual diagram of the generalized channel response to large flash floods was provided during multi-stage periods after the Wenchuan earthquake. It determined the rebalance processes of channel evolution in the tenth year after the earthquake. This study will contribute to understanding the post-earthquake long-term channel evolutions and could provide decision-makers of assessing the mitigation strategies for higher-magnitude flood disasters triggered by channel change in earthquake-affected watersheds. |
| WOS关键词 | 2008 WENCHUAN EARTHQUAKE ; GRAVEL-BED RIVERS ; GRAIN-SIZE ; MORPHOLOGICAL CHANGE ; TOPOGRAPHIC SURVEYS ; LARGE WOOD ; DYNAMICS ; DEMS ; TIMESCALES ; ERROR |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology |
| 语种 | 英语 |
| WOS记录号 | WOS:000896402100001 |
| 出版者 | MDPI |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/187950]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Zhang, Guotao |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, 11A Datun Rd, Beijing 100101, Peoples R China 2.CAS HEC, China Pakistan Joint Res Ctr Earth Sci, House 7,St 45, Islamabad 45320, Pakistan 3.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Earth Surface Proc, 9 Block 4,Renmin South Rd, Chengdu 610041, Peoples R China 4.Minist Emergency Management, Natl Disaster Reduct Ctr China, Yard 6,Guangbai East Rd, Beijing 100124, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jin, Wen,Wang, Hao,Zhang, Guotao,et al. Channel Evolution Triggered by Large Flash Flood at an Earthquake-Affected Catchment[J]. REMOTE SENSING,2022,14(23):20. |
| APA | Jin, Wen,Wang, Hao,Zhang, Guotao,Liu, Dingzhu,&Wang, Jiao.(2022).Channel Evolution Triggered by Large Flash Flood at an Earthquake-Affected Catchment.REMOTE SENSING,14(23),20. |
| MLA | Jin, Wen,et al."Channel Evolution Triggered by Large Flash Flood at an Earthquake-Affected Catchment".REMOTE SENSING 14.23(2022):20. |
入库方式： OAI收割
来源：地理科学与资源研究所
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