A model to study the grain size components of the sediment deposited in aeolian-fluvial interplay erosion watershed

作者：Zhang, Xiang; Li, Zhanbin; Li, Peng^*; Cheng, Shengdong; Zhang, Yang; Tang, Shanshan; Wang, Tian

来源：Sedimentary Geology, 2015, 330: 132-140.

DOI：10.1016/j.sedgeo.2015.10.002

• Aeolian-fluvial interplay erosion
• Deposited sediments
• Grain size distribution
• Weibull distribution

Aeolian-fluvial interplay erosion areas with complex dynamics and physical sources are the main suppliers of coarse sediment in the Yellow River. Understanding the composition, distribution, and sources of deposited sediments in such areas is of great importance for the control of sediment transport in rivers. In this paper, a typical aeolian-fluvial interplay erosion watershed - the Dongliu Gully - was studied and the frequency distribution curves of sediments deposited in the stream channel were fitted using the Weibull function. Sources of deposited sediment in the stream channel were analyzed based on the law of the conservation of matter. Results showed that the hilly zone accounted for 78% of deposited sediments, which were dominated by material with a median grain size (d(50)) of 0.093 mm, and the desert zone accounted for 22% of deposited sediments, which were dominated by material with a d(50) of 0.01 mm. Wind erosion dynamics accounted for 72% of deposited sediments, while water erosion dynamics accounted for only 28%.

• 出版日期2015-12
• 单位中国科学院; 黄土高原土壤侵蚀与旱地农业国家重点实验室; 西安理工大学