海洋地质与第四纪地质2009，Vol.29Issue(1)：31-37,7.DOI:10.3724/SP.J.1140.2009.01031
黏粒和有机质对黄河口潮间带沉积物微团聚体的影响
THE INFLUENCE OF CLAY AND ORGANIC MATTER ON THE SEDIMENT AGGREGATION IN THE YELLOW RIVER ESTUARY
摘要
Abstract
Aggregation is a basic unit to form sediment structure. The structure of sediments impacts on the stability, infiltration and strength of engineering geologic properties. A study was implemented in the abandoned riverway of Yellow River Estuary, Diaokou, on the influence of clay, organic matter and biologic EPS (extracellular polymeric substances) on the aggregation. The results indicate that the sediments mainly become 0. 05 ～ 0. 01 mm aggregation. The content of the aggregation is between 85. 3% and 95. 8%. Compared with loess in loess plateau, the aggregation of 0. 05～0. 01 mm increases, and that of 0. 1～0. 05 mm decreases. The aggregate stability is poor so the sediments are easier to erode. The clay content is in positive correlation with aggregate ratio, which indicates the more the clay content the more stable the aggregation. The mineral composition is not good to aggregate stability. The content of organic matter is between 0. 27% and 0. 61%. The influence of organic matter on sediment aggregation is little. The aggregation ratio from the sediment of crab cave and crab dug is more than that of the surface sediment without bioturbation. This indicates that the EPS produced by crab can increase the aggregation stability.关键词
微团聚体/黏粒/有机质/生物黏液/黄河口Key words
aggregation/ clay/ organic matter/ EPS (extracellular polymeric substances) / the Yellow River Estuary分类
海洋科学引用本文复制引用
陈友媛,赵文娟,贾永刚,许国辉..黏粒和有机质对黄河口潮间带沉积物微团聚体的影响[J].海洋地质与第四纪地质,2009,29(1):31-37,7.基金项目
国家自然科学基金项目(40606020) （40606020）
国家高新技术研究发展计划(2008AA09Z109) （2008AA09Z109）
