中文摘要：

基于浑太流域1966-2006年73个雨量站的日降水资料，建立了逐站年最大日降水量（AnnualMaximum，AM）序列和汛期4-9月日降水量〈1．27mm·d^-1的最长持续干旱天数（MungerIndex，MI）序列，并对其时空分布规律进行了分析。采用广义极值（GeneralExtremeValue，GEV）分布、广义帕雷托（GeneralPareto，GP）分布、韦布尔（Weibull，WB）分布、约翰逊SB（JonhsonsB，J-SB）分布、Burr分布和对数逻辑（Log-Logistic，L-LG）分布等6种极值分布函数对AM和MI序列进行了逐站分布拟合，结果表明，广泛应用的GEV分布整体拟合程度最好，有50个测站的KS检验统计量Dn〈0．09，而未曾推广使用的Burr分布的拟合效果也非常好，有36个测站Dn＜0．09。用GEV分布对50年一遇的AM和MI进行了估算，发现流域中心地区极端强降水和极端干旱的程度较高，分别为〉208mm·d0和〉47d。

英文摘要：

Based on the daily precipitation data of 73 rainfall stations in Hunhe-Taizihe Basin from 1966 to 2006, the Annual Maximum （AM） daily precipitation series and the Munger Index （MI） series that the longest continuous dry days by daily precipitation 〈1.27 mm·d-1 in flood season from April to Septem- ber were established at each rainfall station, and their spatial and temporal distributions were analyzed. Six extreme value distribution functiors were used to fit the distributions of the AM and MI series at each sta- tion. The results show that the wildly used general extreme value（GEV）distribution displayed the best fit to these series on the whole, with the statistic Dn〈0.09 of KS test at 50 stations. In addition, the unwild- ly used Burr distribution function also showed very good fit, with 36 stations＇ Dn〈0.09. A high level of extreme heavy rainfall and extreme drought in the centre of the basin was found when estimated the AM and MI with 50-year return period with GEV, whose AM and MI were ）208 mm· d-1 and ）47 d, re- spectively.