| 青海湟水流域气温与降水时空变化特征 |
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| 引用本文： | 葛杰,张鑫.青海湟水流域气温与降水时空变化特征[J].灌溉排水学报,2017,36(11). |
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| 作者姓名： | 葛杰 张鑫 |
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| 作者单位： | 西北农林科技大学水利与建筑工程学院,陕西杨凌,712100 |
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| 基金项目： | 国家高新技术研究发展计划(863计划)项目，国家科技支撑计划项目，中央高校基本科研业务费科研创新重点项目 |
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| 摘 要： | 为了分析青海湟水流域气温与降水的时空变化特征,选取流域13个气象站点1959―2006年逐日降水与气温资料,用Mann-Kendall突变检验、小波分析等方法研究了气温与降水时空变化特征。结果表明,流域多年平均年降水量在年内分配极不均匀,降水量在春季和冬季有增加趋势,夏季和秋季有减少趋势;降水量以2.13 mm/10 a的速率减少。流域多年平均气温和月平均气温均呈升高趋势,年平均气温以0.348℃/10 a的速率升高。降水和气温空间分布极不均匀,流域西北和东南地区降水量较少,中部地区降水量较多;流域多年平均气温自西北地区到东南地区逐渐升高。年降水系列的突变点在2001年,第一主周期为3 a,第二、第三主周期分别为8 a和15 a;年平均气温系列无突变点,第一主周期为25 a,第二、第三、第四主周期分别为8 a、15 a和3 a。
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| 关 键 词： | 湟水流域 降水和气温 时空变化 突变分析 |
Spatio-temporal Variations of Temperature and Precipitation in Huangshui River Basin within Qinghai Province |
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| GE Jie,ZHANG Xin.Spatio-temporal Variations of Temperature and Precipitation in Huangshui River Basin within Qinghai Province[J].Journal of Irrigation and Drainage,2017,36(11). |
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| Authors: | GE Jie ZHANG Xin |
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| Abstract: | The spatio-temporal variations of temperature and precipitation in Huangshui Basin within Qinghai Province were analyzed in this paper using the precipitation and temperature measured daily over 1959 to 2006 from 13 meteorological stations in the basin. The analysis was based on the Mann-Kendall mutation test, wavelet and other methods. The results showed that the precipitation within a single year varied considerably, increasing in spring and winter and decreasing in summer and autumn. Annually, the precipitation decreased at a rate of 2.13 mm/10 a over this period. Both annual meanand monthly mean temperatures increased at a rate of 0.348℃/10 a. The precipitation and temperature were spatially heterogenous, with the precipitation in northwest and southeast less than that in the central region, and the average temperature increasing from northwest to southeast. There was a steadily change in precipitation in 2001. Annual precipitation had three cycles, one was 3 a, and other two were 8 a and 15 a respectively. The average annual temperature had four cycles:25 a, 8 a, 15 a and 3 a. |
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| Keywords: | Huangshui Basin precipitation and temperature changes of time and space mutation analyzing |
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