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Jinshi Lin, Yanhe Huang , Ming-kuang Wang, Fangshi Jiang, Xubin Zhang, Hongli Ge.Assessing the sources of sediment transported in gully systems using a fingerprinting approach: An example from South-east China


发布者:曹海雷    发布时间:2015-03-02    浏览次数:66

 

所有作者:Jinshi Lin, Yanhe Huang , Ming-kuang Wang, Fangshi Jiang, Xubin Zhang, Hongli Ge

论文题目:Assessing the sources of sediment transported in gully systems using a fingerprinting approach: An example from South-east China

来源期刊:Catena

发表日期:June 2015

原文链接:

http://www.sciencedirect.com/science/article/pii/S0341816215000545

Abstract:

Eroded sediment is an important feature of permanent gully's development; however, obtaining the specific characteristics of the sediment transport in the gully can be difficult. Thus, a composite fingerprinting technique, incorporating uncertainty analysis, has been employed to investigate the mean relative contribution of sediment

sources in permanent gullies. In this study, 31 tracers were measured at 62 different sampling sites from three layers of a gully wall [surface layer (SL), sandy soil layer (SSL), and semi-weathering rock layer (SWL)] and 36 sediment samples from the slumping deposit and alluvial fan of the gullies. The sediment source tracing procedure was therefore used to assess the relative contribution of each source. The mean relative contribution from the SL to the sediment of the slumping deposit is higher in the active gully (G1), and is relatively lower in the potentially stable (G2) and stable gullies (G3); thus there was no obvious gully bank retreat in G2 and G3. In different places of the G1 alluvial fan, the mean relative contribution of the SL, SSL and SWL ranged from 911, 3643 and 4655%, respectively. However, the sediment contribution of the SL increased in G2 and G3 due to the changes in the erosion type. The mean relative contributions of the SL were 33 ± 5 (G2) and 30 ± 3%

(G3). These findings have important implications for the establishment of a scientific basis for permanent gully sediment transport management and control policies.

  

  

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