The contents of clay,silt and nutrient of sediment decreased approximately with time change,and the direct correlations were close among the contents of clay and silt and the contents of nutrient.

• 流失泥沙细小颗粒含量与养分含量随时间基本都呈降低的变化趋势,并且细小颗粒含量与携带流失的养分含量有显著甚至极显著的正相关性;