By use of measured flowrate data of Poyang lake Basin for more than 40 years, the change trend of annual maximum flowrate (AM), peak-over-threshold flowrate (POT) and dry season flowrate are analyzed.

• 摘要利用鄱阳湖流域40多年来的实测流量数据，分析了该流域年最大流量、高于阈值的洪峰流量和枯水流量的变化趋势。