董彦雄,马鹏里,白虎志,杨兴国.泾河流域近60年降水演变规律[J].干旱地区农业研究,2004,(3):154~159 |
泾河流域近60年降水演变规律 |
The regularity of precipitation in the Jinghe river basin in recent 60 years |
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DOI:10.7606/j.issn.1000-7601.2004.03.35 |
中文关键词: 泾河流域 降水序列 演变规律 |
英文关键词:Jinghe river basin time series methodology for statistic analysis |
基金项目:兰州区气象中心开放室实验项目"干旱气象监测试验研究" |
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中文摘要: |
对泾河流域11个气象站(1960~2000年)的降水量资料,通过标准化、滤波等方法处理简化了研究对象。采用数理统计方法对降水时间序列进行分析,得到泾河流域降水演变的规律,春季有5a、8a的显著周期,夏秋有准7a的周期振荡,冬季有4a、6a的短周期,还有17a左右的长周期。同时,用流域内平凉站近60a(1942~2000年)的序列进行对比分析,发现演变规律基本一致。利用上述规律对2001~2003年流域内降水进行试验性拟合预测,结果与实况基本符合,并显示21世纪前10a泾河流域秋雨量有可能改变上世纪末持续偏少的态势,呈偏多趋势。 |
英文摘要: |
Using the precipitation data observed by the 11weather stations(1996~2000) in Jinghe River basin and simplifying the research object—the precipitation data in Jinghe river basin by parting season, calculating average and filtrating wave,the article analyses the precipitation time series with statistic method.The result show that there are distinct5years and8years periods in spring,7years quasi periods in summer and autumn,4years and6years short periods in winter and around17years long period in addition. Furthermore,by analysis of Pingliang 59years (1942~2000) ’s precipitation,a resemble regularity are found.The testing simulation and forecast indicate that the prediction come near to the factual value in the past three years (2001~2003) ,and the situation of the lasting lack of autumn precipitation in Jinghe river basin in the past forty years (1961~2000) will be changed in early decade of 21st century. |
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