The process of sediment accumulation in Poyang Lake is complex due to spatial and temporal changes in environmental conditions controlled both by inlet rivers and the Changjiang River.The whole lake can be divided into three different parts according to the characteristics of sedimentation processes,i.e.southern, middle and northern parts,the average rates of which are 0.52cm/a,0.16cm/a and 0.34cm/a,respectively.Moreover,the sedimentation rates in different sedimentary geomorphic units are varied with changes of water dynamics and material sources, g.0.80cm/a for levee,0.36cm/a for flood plain,0.13cm/a for small secondary depression and 0.17cm/a for open area.