利用体积分形维数模型对塔里木河干流上中游河床沉积物的粒度分形特征进行分析,并探讨了沉积物分形维数与粒度组成、粒度参数的相关关系,结果表明:(1)塔里木河干流上中游河床沉积物粒度粒径介于0~9 mm,黏粒、粉粒与砂粒含量的均值分别为11.46%、53.29%和35.25%,采集样品中有2/3为细粒土,其余为细粒土质砂,沉积物质地相对较细。(2)沉积物体积分形维数介于1.921~2.403,均值为2.114,河床沉积物粒度组成相对简单。(3)沉积物分形维数与黏粒及粉粒含量呈显著的正相关关系,相关系数分别为0.594、0.372,与砂粒含量呈显著的负相关关系,相关系数为-0.538,分形维数越大,沉积物质地越细。(4)分形维数与平均粒径呈显著的负相关关系,相关系数为-0.529,与标准差、偏度和峰度呈现显著的负相关关系,相关系数分别为0.272、0.714和0.483,分形维数可反应沉积物粒度参数的综合特征。 Based on the fractal dimension model, the fractal characteristics of the sediments in the upper and middle reaches of the Tarim River were analyzed, and the correlation between the fractal dimension and the grain size and grain size parameters was discussed. The results show that: (1) The mean grain size of sediment in the middle reaches of the river bed ranged from 0 to 9 mm, and the mean values ​​of clay, silt and sand contents were 11.46%, 53.29% and 35.25% respectively. Two-thirds of the collected samples were fine-grained and the rest were fine Particulate sand, sediment material is relatively thin. (2) The volume fractal dimension of sediments ranged from 1.921 to 2.403 with a mean value of 2.114. The sediment particle size of the sediments is relatively simple. (3) There is a significant positive correlation between the fractal dimension of sediment and clay and silt content, the correlation coefficients are 0.594 and 0.372, respectively. There is a significant negative correlation between the fractal dimension and sand content, the correlation coefficient is -0.538. Large, sediment material more detailed. (4) There is a significant negative correlation between the fractal dimension and the average particle size. The correlation coefficient is -0.529, which shows a significant negative correlation with the standard deviation, skewness and kurtosis. The correlation coefficients are 0.272, 0.714 and 0.483 respectively. The dimensions reflect the integrated characteristics of the sediment grain size parameters.