泥沙研究2025，Vol.50Issue(2)：25-31,7.DOI:10.16239/j.cnki.0468-155x.2025.02.004
微生物EPS-泥沙底床床面变形与有机质埋藏特性研究
Study on deformation characteristics of EPS-sediment bed surface and burial features of organic matter
摘要
Abstract
The extracellular polymeric substances(EPS)secreted by microorganisms are widely distributed in the surface layer of sediment.However,the impact of low-concentration EPS on the bedform and the erosion of sandy beds,and the development of sand ripples and their reaction to the organic matter burial remains un-clear.A flume experiments was conducted,and the results indicate that the content of EPS in the surface layer significantly affects the development rate and total erosion of the bed,and this influence shows a nonlinear re-lationship with EPS concentration.The low-concentration(0.005％)EPS inhibits the scale of ripple develop-ment,but exacerbates the overall bed erosion(with erosion increasing by 38％);the high-concentration EPS demonstrates a pronounced biological stabilization effect,substantially suppressing the occurrence of rippled-bed and erosion(when EPS concentration reaches 0.1％,erosion amount decreased by 92％).Simultaneous-ly,low-concentration(0.005％,0.02％)EPS facilitates stable burial and protection of organic matter in the sub-surface layer during the migration of ripples and sediment transport.关键词
EPS/生物膜/床面变形/有机质埋藏Key words
EPS/biofilm/bedform/organic matter burial分类
水利科学引用本文复制引用
余扬,周吉,童幸子,周荪瑞,年泽民,陈欣迪..微生物EPS-泥沙底床床面变形与有机质埋藏特性研究[J].泥沙研究,2025,50(2):25-31,7.基金项目
中央高校基本科研业务费专项(B230201061) （B230201061）
河海大学大学生创新创业训练计划资助项目(202310294059Z) （202310294059Z）
