根据三峡工程蓄水运用后的实测资料，简述三峡库区泥沙淤积、坝下游河道冲刷，并与论证阶段的研究成果进行对比。分析认为三峡工程蓄水运用8年，水库泥沙淤积及坝下游河道冲刷等出现的情况尚在原预测范围之内，表明原预测的研究成果可行；本次实测与预测对比，在时间上略显短促，仍需今后观测并作进一步对比；今后应加强原型观测及有关研究工作。

According to the measured data after impoundment and operation of the Three Gorges Reservoir, the reservoir sediment deposition and downstream river channel scouring are described briefly and compared with the research results achieved in the demonstration stage. It is indicated through analysis that the reservoir sediment deposition and downstream river channel scouring during 8-year impoundment and operation are still within the original forecast, so the original forecasting results are feasible. The further observation and comparison should be conducted because the comparison between the observed data and the original forecast is not so sufficient in time and the prototype observation and related research work should be strengthened in the future.