IMHE OpenIR  > Journal of Mountain Science  > Journal of Mountain Science-2015  > Vol12 No.5
Experimental Study of the Interaction between Building Clusters and Flash Floods
DU Jun; HE Xiao-yan; WANG Zhao-yin; ZHANG Chen-di; LI Wen-xin
Corresponding AuthorWANG Zhao-yin
Source PublicationJournal of Mountain Science
AbstractIn recent years, flash flood disasters have occurred frequently in southwest China due to the increased frequency of extreme climate events. To solve this problem, great efforts have been made in studying the process of flash flood. However, little attention was paidon bearing body of hazard, the clusters of buildings. Thus the real disaster mechanism of flash flood remains unclear. Accordingly, based on the experiments of artificial flash floods in a conceptual solid model, this paper focuses on the flood-impacted inundation characteristics of the building clusters at different locations of the gully model, in order to obtain a better understanding of the disaster process and the interaction between the flash floods and building clusters. The results showed that, in a typical small-scale flash flood gully with hot and dry climate, 1) clusters of buildings on an alluvial fan could reduce about 35% of the flooding area by blocking the diffusion of the flood to the depression areas, and could also promote the deposition in lower reaches of the river channel by blocking the overbank flow from going back into the channel, making the width-depth ratio of the channel larger. 2) The flash flood rates of disaster and hazard on the alluvial fan are generally higher than that of the inner gully. For the inner gully, buildings located on the beaches along the lower river and the transitional areas of the straight channel and channel bends can easily be affected because of their lower elevations. For the alluvial fan, buildings nearby the meanders suffer the greatest impacts because of bank collapsing and flooding. 3) The safe vertical distance from a building to the river channel is 13 m for the buildings in the inner gully under extreme floods. Below this threshold, the smaller the vertical distance is, the greater the risk exposure is. For the buildings on the alluvial fan, especially for the buildings near the concave bank of the top rush point, the horizontal distance is more important, and the safe value is 80 m under extreme floods.
KeywordFlash Floods Building Clusters Settlement’s Distribution Disaster Process Field Model Experiment
Indexed BySCI
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Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
CollectionJournal of Mountain Science_Journal of Mountain Science-2015_Vol12 No.5
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GB/T 7714
DU Jun,HE Xiao-yan,WANG Zhao-yin,et al. Experimental Study of the Interaction between Building Clusters and Flash Floods[J]. Journal of Mountain Science,2015,12(5):1334-1344.
APA DU Jun,HE Xiao-yan,WANG Zhao-yin,ZHANG Chen-di,&LI Wen-xin.(2015).Experimental Study of the Interaction between Building Clusters and Flash Floods.Journal of Mountain Science,12(5),1334-1344.
MLA DU Jun,et al."Experimental Study of the Interaction between Building Clusters and Flash Floods".Journal of Mountain Science 12.5(2015):1334-1344.
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