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- Title
Spatial–temporal characteristics of sediment transport by intermittent surges.
- Authors
Liu, Daochuan; Jia, Yang; He, Yunyong; Shao, Jiang; Xiang, Bo; Liang, Miao; Wang, Fuming; Guo, Chengchao
- Abstract
Debris flows move as surge waves and they transport volumes of sediment of various magnitudes at irregular time intervals. As exemplified by Jiangjia Gully (JJG; Yunnan Province, China), the sediment transport of such surges can fluctuate by up to four orders of magnitude within a single debris flow event. This study investigated the variation of the sediment transported by a series of surges based on observations of 3000 surges in JJG. It was found that the fluctuation in sediment transport evolved with surge progress and then finally decayed in a power law form with a decay coefficient of 0.1–0.5, which can be considered a representative of the underlying dynamics. Moreover, the cumulative sediment yield followed a unified sediment size distribution (SSD) that can be expressed as P (S) = C S - β exp (- S / S c) , with parameters well associated with the material composition of the surges. Moreover, this distribution also applies to transport processes in large-scale rivers, which suggests that the SSD could be used to predict the scale of sediment transport in rivers.
- Subjects
SEDIMENT transport; FREIGHT trucking; DEBRIS avalanches; SEDIMENTS; STORM surges; RIVER sediments
- Publication
Landslides, 2023, Vol 20, Issue 6, p1225
- ISSN
1612-510X
- Publication type
Article
- DOI
10.1007/s10346-023-02025-7