Multifractal features of the particle-size distribution of suspended sediment in the Three Gorges Reservoir, China
Multifractal features of the particle-size distribution of suspended sediment in the Three Gorges Reservoir, China作者机构：Key Laboratory of Mountain Surface Processes and Ecological Regulation Institute of Mountain Hazards and Environment Chinese Academy of Sciences Chongqing Key Laboratory of Earth Surface Processes and Environmental Remote Sensing in the Three Gorges Reservoir Area University of Chinese Academy of Sciences School of Geographical Sciences Southwest University
出 版 物：《International Journal of Sediment Research》 (国际泥沙研究(英文版))
年 卷 期：2021年第36卷第4期
页 面：489-500页
核心收录：
学科分类：08[工学] 081502[工学-水力学及河流动力学] 0815[工学-水利工程]
基 金：supported by the National Natural Science Foundation of China (Grant Nos. 41771320, 41771321, and 41977075) the Science Fund for Distinguished Young Scholars of Chongqing (Grant No. cstc2019jcyjjqX0025) the Science and Technology Research Program of the Chongqing Municipal Education Commission (Grant No. KJZD-K201800502) the Opening Project of the Chongqing Key Laboratory of Earth Surface Processes and Environmental Remote Sensing in the Three Gorges Reservoir Area (Grant No. DBGC201801)
主 题：Particle-size distribution Suspended sediment Multifractal features Flow regulation Three Gorges Reservoir
摘 要：The Three Gorges Reservoir(TGR) in China is the largest hydroelectric project in the world,but the threat of sediment affecting ecological sustainability of the reservoir is a topic of *** particlesize distribution(PSD) is informative in understanding sediment transport dynamics and biochemical *** is,therefore,important to quantitatively characterize the distribution of sediment *** the current study,fractal theory is applied to determine the PSD of suspended sediment in the *** results show that the volumetric fractal dimension(Dv) exhibits a significant seasonal difference(p 0.05),reflecting sediment source and hydrodynamic sorting control the granularity of suspended sediment in the *** specifically,suspended sediment particles are coarser in the wet season than in the dry season for the Yangtze River,and the opposite is true for the Ruxi River,an important *** generalized dimension spectrum,D(q)-q,and multifractal singularity spectrum,f[α(q)]-α(q),were calculated for each suspended sediment ***,the parameters,D(0),D(1),D(2),α(0),Δα(q),and Δf [α(q)],were determined to characterize the *** a result,the coarser suspended sediment during the wet season is characterised by a more complex PSD pattern,with a wider range of particle sizes,greater heterogeneity,and greater homogeneity of distribution over the measurement ***,the multifractal structure of the PSD of suspended sediment is more complex during the dry season than during the wet season,with higher local dispersion and *** findings of the current study highlight that multifractal analysis provides important insight for understanding the PSD of suspended sediment in the TGR.
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