[目的]分析河西地区近58年降水的时空变化特征.[方法]依据河西地区1951～2008年月降水资料,运用滑动平均、小波分析及气候趋势系数等方法,分析了河西地区近58年来降水的变化规律.[结果]河西地区多年平均降水量为130.4mm,降水主要集中在夏季,占全年降水量的59.08％,6～9月降水量占全年的72.57％.河西地区降水年代际变化不剧烈,各年代平均降水量为120.8～139.0mm.河西地区1951～2008年降水系列存在5、10、21和32年左右的周期.未来,河西地区年、春、夏及冬季降水将呈小幅增加趋势,其中,疏勒河流域年降水增幅较大(5.231～0.062mm/10a)；黑河流域南部和东南部比西北部增幅相对较大；石羊河流域年降水增幅最小,为3.280～0.098mm/10a.[结论]该研究可为当地社会经济与生态环境协调发展提供有益参考.%[ Objective] The research aimed to analyze temporal and spatial variation characteristics of the precipitation in Hexi Corridor in the past 58 years. [Method] Based on monthly rainfall data in Hexi Corridor from 1951 to 2008, by using moving average, wavelet analysis and climate trend coefficient, variation rule of the precipitation in Hexi Corridor in the past 58 years was analyzed. [Result] Average rainfall in Hexi Corridor in the past 58 years was 130.4 mm. Precipitation mainly concentrated in summer, occupying 59.08% of the annual rainfall. From June to September, it occupied 72.57% of the annual precipitation. Interdacedal change of the precipitation in Hexi Corridor wasn't severe. Average rainfall in each decade was from 120. 8 to 139. 0 mm. The precipitation series had periods of 5, 10, 21 and 32 years in Hexi Corridor from 1951 to 2008. In the future, annual, spring, summer and winter precipitation would have small increase tendency. Increase amplitude of the annual precipitation in Shule River basin was the biggest (5. 231 -0. 062 mm/10a). The increase amplitude in the south and southeast of the Heihe River basin was bigger than that in the northwest. The smallest increase amplitude of the annual precipitation was 3.280 - 0.098 mm/10a in Shiyang River basin. [ Conclusion] This research could provide beneficial reference for coordinated development between local social economy and ecological environment.
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