黄河乌兰布和沙漠段不同区域入黄沙物质粒度特征及其来源分析  

Grain size characteristics and source analysis of aeolian sediment feed into river in Ulanbuh Desert along bank of Yellow River

作　　者：郭建英[1] 李锦荣[1] 陈新闯 董智[3] 田世民[4] 田秀民[1] GUO Jianying;LI Jinrong;CHEN Xinchuang;DONG Zhi;TIAN Shimin;TIAN Xiumin(Institute of WaterResources for Pastoral Area of the Ministry of Water Resources of China,Hohhot 010020,China;State Key Laboratory of Urban and Regional Ecology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China;Forestry College of Shandong Agricultural University,Tai’an 271018,China;Key Laboratory of Yellow River Sediment,Institute of Hydraulic Research,Zhenghou 450003,China)

机构地区：[1]水利部牧区水利科学研究所,内蒙古呼和浩特010020 [2]中国科学院生态环境研究中心城市与区域生态国家重点实验室,北京100085 [3]山东农业大学林学院,山东泰安271018 [4]黄河水利委员会黄河水利科学研究院,河南郑州450003

出　　处：《中国水利水电科学研究院学报》2021年第1期15-24,共10页Journal of China Institute of Water Resources and Hydropower Research

基　　金：国家自然科学基金项目(41301303);中国水利水电科学研究院基本科研业务费专项(MK0145B722017)。

摘　　要：土壤是具有自相似结构及一定分形特征的不规则复杂多孔介质,为更好地对黄河乌兰布和沙漠段不同区域入黄沙物质粒度特征进行定量表征并解析其来源,利用传统统计学和多重分形理论,研究了黄河乌兰布和沙漠不同地段土壤的粒度特征及粒径分布。结果表明:研究区土壤颗粒组成具有明显的多重分形特征,沙头对岸D_(0)值为0.821、D_(1)值为4.386,即粒径分布范围最宽且最不均匀,荒漠草原D_(1)值为2.970、D_(1)/D_(0)值为4.595,即粒径分布最均匀且离散程度最大;不同地段土壤粒径分布范围间存在差异,但相近地段颗粒组成类似;河道左岸由于受乌兰布和沙漠的影响,使得河道左侧的沉积物粒度变粗,其来源于沙漠的沙物质,而右侧河道几乎不受乌兰布和沙漠的影响。Soil is a kind of irregular and complex porous media with self-similar structure and certain frac⁃tal characteristics.In order to quantitatively characterize the grain size characteristics and analyze the source of sediment in different areas of Ulanbuh desert along bank of the Yellow River,the grain size char⁃acteristics and particle size distribution of soil in different areas were studied by using traditional statistics and multifractal theory.The results show that the soil particle composition has obvious multifractal character⁃istics.The D0 value of the opposite bank of sand head is 0.821,and the D_(1) value is 4.386,which means that the distribution range of particle size is the widest and most uneven.The D_(1) value of desert grassland is 2.970,and the D_(1)/D_(0) value is 4.595,which means that the distribution of soil particle size is the most uniform and the degree of dispersion is the largest.Due to the influence of Ulanbuh desert on the left bank of the river channel,the grain size of the sediment on the left side of the river channel is coarser,which comes from the sand material of the desert,while the river channel on the right side is hardly affect⁃ed by the desert.

关 键 词：多重分形维数 粒度特征 来源分析 乌兰布和沙漠 

分 类 号：P642.112[天文地球—工程地质学]