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Connectivity of earthquake-triggered landslides with the fluvial network: Implications for landslide sediment transport after the 2008 Wenchuan earthquake
Li, Gen1; West, A. Joshua1; Densmore, Alexander L.2,3; Hammond, Douglas E.1; Jin, Zhangdong4; Zhang, Fei4; Wang, Jin4; Hilton, Robert G.2,3
2016-04-01
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
Volume121Issue:4Pages:703-724
SubtypeArticle
AbstractEvaluating the influence of earthquakes on erosion, landscape evolution, and sediment-related hazards requires understanding fluvial transport of material liberated in earthquake-triggered landslides. The location of landslides relative to river channels is expected to play an important role in postearthquake sediment dynamics. In this study, we assess the position of landslides triggered by the M-w 7.9 Wenchuan earthquake, aiming to understand the relationship between landslides and the fluvial network of the steep Longmen Shan mountain range. Combining a landslide inventory map and geomorphic analysis, we quantify landslide-channel connectivity in terms of the number of landslides, landslide area, and landslide volume estimated from scaling relationships. We observe a strong spatial variability in landslide-channel connectivity, with volumetric connectivity (xi) ranging from similar to 20% to similar to 90% for different catchments. This variability is linked to topographic effects that set local channel densities, seismic effects (including seismogenic faulting) that regulate landslide size, and substrate effects that may influence both channelization and landslide size. Altogether, we estimate that the volume of landslides connected to channels comprises 43 + 9/-7% of the total coseismic landslide volume. Following the Wenchuan earthquake, fine-grained (90% of the total landslide volume) may be more significantly affected by landslide locations.
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1002/2015JF003718
WOS KeywordTEMPERATE MONTANE FOREST ; MOUNTAIN DRAINAGE BASINS ; THRESHOLD HILLSLOPES ; TIBETAN PLATEAU ; GROUND MOTION ; EROSION ; TOPOGRAPHY ; EVOLUTION ; DENSITY ; TAIWAN
Indexed BySCI
Language英语
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000382579600004
Citation statistics
Cited Times:24[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/5677
Collection加速器质谱中心
Affiliation1.Univ So Calif, Dept Earth Sci, Los Angeles, CA 90007 USA
2.Univ Durham, Inst Hazard Risk & Resilience, Durham, England
3.Univ Durham, Dept Geog, Durham, England
4.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian, Peoples R China
Recommended Citation
GB/T 7714
Li, Gen,West, A. Joshua,Densmore, Alexander L.,et al. Connectivity of earthquake-triggered landslides with the fluvial network: Implications for landslide sediment transport after the 2008 Wenchuan earthquake[J]. JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE,2016,121(4):703-724.
APA Li, Gen.,West, A. Joshua.,Densmore, Alexander L..,Hammond, Douglas E..,Jin, Zhangdong.,...&Hilton, Robert G..(2016).Connectivity of earthquake-triggered landslides with the fluvial network: Implications for landslide sediment transport after the 2008 Wenchuan earthquake.JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE,121(4),703-724.
MLA Li, Gen,et al."Connectivity of earthquake-triggered landslides with the fluvial network: Implications for landslide sediment transport after the 2008 Wenchuan earthquake".JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE 121.4(2016):703-724.
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