人民黄河2018，Vol.40Issue(5)：1-6,11,7.DOI:10.3969/j.issn.1000-1379.2018.05.001
黄河三角洲沉积物及其渗透系数空间分布特征
Spatial Distribution of Particle Size and Hydraulic Conductivity of Shallow Surface Sediments in the Yellow River Delta
摘要
Abstract
The sedimentprocess of modern Yellow River delta is active and complex,and the attribute of sediment particle as well as the spa-tial distribution of hydraulic conductivity dominate the surface water and groundwater interaction,water and salt transport of regional groundw-ater and the evolution of wetland ecological environment. Based on the 70 shallow sediment samples with 10 cm, 30 cm and 90 cm depth across the delta,the particle size parameters and hydraulic conductivity and their spatial distribution were analyzed. The results show that the shallow sediment is mainly composed of fine sand and silt,with an average effective particle diameter of 5.2 μm and a belt pattern from the vertex of delta to seashore;particle size of shallow sediment is large in the highland near Diaokouhe and Shenxiangou channels. The average hydraulic conductivity(K)is 0.65 m/d, with a limited spatial variation and gradually decreasing trend with depth. The average K near Shenxiangou channel is 0.98 m/d,which is notably higher than that of the other region and is the largest in average and variance for 30 cm depth. K along the Qingshuigou channel is smaller than that along the Diaokouhe channel, and the average and variance of K are both the smallest in the two reserves. The sediment particle size and distribution under different sedimentary environment are the main causes of differ-ences in K.关键词
渗透系数/颗粒分析/浅表层沉积物/黄河三角洲Key words
hydraulic conductivity/particle analysis/shallow sediment/Yellow River delta分类
天文与地球科学引用本文复制引用
刘波,林晓宁,马红亮,克热木·阿布都米吉提..黄河三角洲沉积物及其渗透系数空间分布特征[J].人民黄河,2018,40(5):1-6,11,7.基金项目
国家自然科学基金资助项目(41572210,41501053) （41572210,41501053）
中央高校基本科研业务费专项(2017B15314). （2017B15314）
