泥沙研究2026，Vol.51Issue(3)：9-15,7.DOI:10.16239/j.cnki.0468-155x.2026.03.002
黏性泥沙含量对富粉砂床面沙纹特征影响试验研究
Experimental study on the effect of cohesive sediment content on sand ripple characteristics of a silt-enriched bed
摘要
Abstract
Silt-enriched beds,characterized by silt content exceeding 60％and clay content below 20％,are widely distributed along the coast of Jiangsu province.However,studies on the ripple characteristics of such beds remain limited,and it is still unclear whether their features are consistent with the existing findings on sand-mud mixed beds.To address this gap,a series of unidirectional steady-flow experiments with flow veloci-ty of 40 cm/s were conducted using four groups of silt-enriched sediment samples with cohesive sediment con-tents(medium particles size is finer than 8 μm)of 2.1％,6.2％,8.5％,and 10.1％,respectively.The re-sults show that the silt-enriched bed still behaved as a non-cohesive bed when the cohesive sediment content is lower.With the increasing of cohesive sediment content,the initiation of ripples and the time required to reach equilibrium gradually increase,while ripple dimensions at equilibrium decrease,and the average growth rates of both wavelength and height continuously decline.As the cohesive sediment content further increased,the bedform will transform into a cohesive bed,with all parameters tending toward stabilization.关键词
粉砂/黏土/沙纹/床面Key words
silt/clay/ripple/bed分类
建筑与水利引用本文复制引用
李宸锐,许春阳,陈永平,何哲遵..黏性泥沙含量对富粉砂床面沙纹特征影响试验研究[J].泥沙研究,2026,51(3):9-15,7.基金项目
国家重点研发计划项目(2023YFC3008100) （2023YFC3008100）
国家自然科学基金面上项目(42376171) （42376171）
国际(地区)合作与交流项目(W2421060) （地区）
