鄱阳湖水文特征变化明显,总悬浮物(TSS)受湖区水位和五河影响较大.通过时序MODIS数据提取全湖TSS浓度信息,从湖体水位、五河流量、五河含沙量3个指标来分析TSS浓度的时空分布特征和变化规律.结果表明:随水位变化全湖TSS浓度在8.8和13.0m附近有急剧变化的过程,其他水位的TSS浓度变化较为平稳,水位与全湖TSS浓度平均值呈线性正相关性；丰水期五河流量、含沙量较大,TSS浓度变小,而枯水期五河流量、含沙量减小,则TSS浓度变大；当水位变化幅度不大时,水流流速和水域面积相对稳定,五河流量、含沙量与TSS浓度成正比关系.初步揭示了湖区水体TSS浓度对水文特征的响应关系.%The variation of hydrology characters in Poyang Lake was evident, total suspended sediment (TSS) was affected by lake water level and five rivers. Through extracting TSS concentration by MODIS data, the temporal and spatial distribution characteristics and variation law of TSS concentration were analyzed from three indexes of lake water level, flux and sediment concentration of five rivers. The results showed that TSS concentration changed sharply when water level is at 8. 8 -13. 0 m, the water level and mean of whole lake TSS concentration indicated linear positive correlation; when the flux and sediment concentration of five levels is big in plentiful water period, TSS concentration increased, while when the flux and sediment concentration of five levels is small in dry period, TSS concentration increased; when water level change amplitude isn' t large, the water flow speed and water area were relative stable, flux, sediment concentration of five rivers and TSS concentration indicated positive relationship. Hie response relationship of TSS concentration to hydrology character was revealed.
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