IMHE OpenIR  > Journal of Mountain Science  > Journal of Mountain Science-2011  > Vol8 No.2
Influences of the Wenchuan Earthquake on sediment supply of debris flows
Zhu Jing; Ding Jun; Liang Jingtao
Corresponding AuthorZhu, J
2011-04
Source PublicationJOURNAL OF MOUNTAIN SCIENCE
ISSN1672-6316
Volume8Issue:2Pages:270–277
AbstractThe 5.12 Wenchuan Earthquake and the subsequent rainstorms induced a large number of landslides, which later were transformed into debris flows. To evaluate the effect of the earthquake on the sediment supply of debris flows, eight debris flow basins near Beichuan City, Sichuan Province, China were chosen as the study area. The area variations of the debris flow source after the Wenchuan Earthquake and the subsequent rainstorm are analyzed and discussed in this paper. Interpretations of aerial photographs (after the 5.12 Wenchuan Earthquake) and SPOT(5) images (after the rainstorm event of September 24, 2008) as well as field investigations were compared to identify the transformation of landslide surface in the study area, indicating that the landslide area in the eight debris flow basins significantly increased. The loose sediment area on the channel bed increased after the rainstorm event. In order to estimate the relationship of the landslide area with the rainfall intensity in different return periods, a model proposed by Uchihugi was adopted. Results show that new landslide area induced by heavy rainfall with 50-year and 100-year return period will be 0.87 km(2) and 1.67 km(2), respectively. The study results show the Wenchuan earthquake had particular influences on subsequent rainfall-induced debris flow occurrence.
KeywordWenchuan Earthquake Debris Flow Rainstorm Remote Sensing Imagery
Language英语
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/5832
CollectionJournal of Mountain Science_Journal of Mountain Science-2011_Vol8 No.2
Recommended Citation
GB/T 7714
Zhu Jing,Ding Jun,Liang Jingtao. Influences of the Wenchuan Earthquake on sediment supply of debris flows[J]. JOURNAL OF MOUNTAIN SCIENCE,2011,8(2):270–277.
APA Zhu Jing,Ding Jun,&Liang Jingtao.(2011).Influences of the Wenchuan Earthquake on sediment supply of debris flows.JOURNAL OF MOUNTAIN SCIENCE,8(2),270–277.
MLA Zhu Jing,et al."Influences of the Wenchuan Earthquake on sediment supply of debris flows".JOURNAL OF MOUNTAIN SCIENCE 8.2(2011):270–277.
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