Evaluating the post-earthquake landslides sediment supply capacity for debris flows
文献类型：期刊论文
| 作者 | Jin, Wen3,4; Cui, Peng1,3; Zhang, Guotao2; Wang, Jiao1,3; Zhang, Yunxia4; Zhang, Peng4 |
| 刊名 | CATENA
 |
| 出版日期 | 2023 |
| 卷号 | 220页码:17 |
| 关键词 | Sediment supply capacity Hillslope -channel connectivity Post -earthquake landslide Spatio-temporal evolution The Wenchuan earthquake -affected area |
| ISSN号 | 0341-8162 |
| DOI | 10.1016/j.catena.2022.106649 |
| 通讯作者 | Cui, Peng(pengcui@imde.com) |
| 英文摘要 | Earthquake-triggered landslides provide sufficient loose material for the formation of subsequent debris flow events in earthquake-affected catchments. The landslides sediment supply capacity (SSC) for debris flows plays an important role in post-earthquake sediment transportation, which is influenced by landslide location during different post-earthquake periods. In this study, the logarithmic slope-area diagram was used to distinguish hillslope and channel processes in catchments affected by the Wenchuan earthquake, adopting a threshold be-tween hillslopes and channels set at 1 km2. In comparison with the existing structural sediment delivery ratio (SDR), it was found that the SSC assessed using the SDR showed a decreasing trend of power exponent as distance increased, effectively eliminating the impact of earthquake-triggered sediment supply. To efficiently assess the SSC of post-earthquake landslides for debris flows, we proposed a novel dimensionless index, namely Mean Landslide Sediment Delivery Ratio (MLSDR), by considering the impact of earthquakes and eliminating the impact of catchment area. It was found that, the SSC of coseismic landslides assessed by the MLSDR in catch-ments affected by the Wenchuan earthquake could better reflect seismic impact, with higher values concentrated along the seismogenic fault of the earthquake, thereby highlighting the satisfactory applicability of the method in the Wenchuan earthquake-affected area. Moreover, it was found that the proposed index had a reasonable corresponding relationship with debris flow development in Wenchuan earthquake-affected catchments, mainly for values of 0.2 < MLSDRout < 2.25 and 0.3 < MLSDRchannel < 4.5, which could help identify potential debris flow development. The controlling factors of long-term changes in coseismic and post-earthquake SSC in the Wen-chuan earthquake-affected region were assessed. It was found that SSC was controlled by earthquakes during first three years and subsequently controlled by precipitation and grain composition. This study will strengthen the understandings of the long-term evolution of post-earthquake debris flow. |
| WOS关键词 | 2008 WENCHUAN EARTHQUAKE ; TOPOGRAPHIC ANALYSIS ; SHORT COMMUNICATION ; AREA ; CONNECTIVITY ; SLOPE ; SUSCEPTIBILITY ; MODEL ; LANDSCAPE ; EVOLUTION |
| WOS研究方向 | Geology ; Agriculture ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000874675300002 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/186165]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Cui, Peng |
| 作者单位 | 1.CAS HEC, China Pakistan Joint Res Ctr Earth Sci, Islamabad 45320, Pakistan 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China 3.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610041, Peoples R China 4.Minist Emergency Management, Natl Disaster Reduct Ctr China, Beijing 100084, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jin, Wen,Cui, Peng,Zhang, Guotao,et al. Evaluating the post-earthquake landslides sediment supply capacity for debris flows[J]. CATENA,2023,220:17. |
| APA | Jin, Wen,Cui, Peng,Zhang, Guotao,Wang, Jiao,Zhang, Yunxia,&Zhang, Peng.(2023).Evaluating the post-earthquake landslides sediment supply capacity for debris flows.CATENA,220,17. |
| MLA | Jin, Wen,et al."Evaluating the post-earthquake landslides sediment supply capacity for debris flows".CATENA 220(2023):17. |
入库方式： OAI收割
来源：地理科学与资源研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。