摘要:
本次研究采用鄱阳湖流域12个气象站点1955~2014年的气象数据，计算该流域多重时间尺度的SPEI值，分析SPEI在该流域的应用情况，同时基于SPEI分析鄱阳湖流域旱涝特征。研究结果表明：SPEI指数在鄱阳湖流域适用性较好。流域在90年代降水增多，SPEI值上升，洪涝灾害增加；00年代SPEI下降趋势明显，旱灾增加；10年代后SPEI波动较大，重旱和重涝灾害频繁交替。流域春季和秋季干旱呈现增加的趋势；夏季在90年代以后降水偏多，洪涝灾害增多，干旱减少；冬季无变化。
Abstract:
In this study, the meteorological data of 12 meteorological stations from 1955 to 2014 in the Poyanghu basin were used to calculate the standardized precipitation evapotranspiration index (SPEI) at different scales and analyze the application of SPEI in the basin. At the same time, drought and waterlogging dis-tribution of time and space in Poyanghu basin was analyzed by SPEI index. Research results show that SPEI is confirmed to be applicable in Poyanghu basin. Precipitation increases in the 1990s which results in increasing flooding. SPEI decreases significantly and increases drought in the 2000s. In the 2010s, SPEI has a larger fluctuation, severe drought and heavy flooding disasters alternately. Drought in the Poyanghu basin shows an increasing trend in spring and autumn, while precipitation increases in summer. The droughts reduced after 1990s and unchanged in winter.