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| 新疆阿克苏河流域降水的时空分布 | |
| 引用本文： | 高惠芸,杨青,梁岩鸿.新疆阿克苏河流域降水的时空分布[J].干旱区研究,2008,25(1):70-74. |
| 作者姓名： | 高惠芸 杨青 梁岩鸿 |
| 作者单位： | 1. 新疆师范大学,地理科学与旅游学院,新疆,乌鲁木齐,830054;中国气象局,乌鲁木齐沙漠气象研究所,新疆,乌鲁木齐,830002 2. 中国气象局,乌鲁木齐沙漠气象研究所,新疆,乌鲁木齐,830002 3. 山西师范大学,城市与环境科学学院,山西,临汾,041000 |
| 基金项目： | 科研院所社会公益研究专项(2004DIB3J118)资助 |
| 摘 要： | 基于新疆阿克苏河流域的自然地理特征,利用阿克苏河流域内及附近的11个气象台站1960-2003年的降水资料,对降水进行时间和空间的分析。时间分析表明:自1960年以来,流域内降水呈不显著的增加趋势,线性倾向率为0.522,从20世纪70年代开始降水以13.21 mm/10 a的速度增加。降水年际变化较大,相对较不稳定,变异系数的平均值为0.38。空间分析是以DEM数据为基础,采用梯度距离平方反比法(GIDS)作为差值公式,得出整个流域的年降水量呈纬向分布特征,降水量的大小与地形分布有着十分密切的关系。回归分析显示:降水量与海拔高度呈二次函数的相关关系,得出其二次函数模型,并通过了0.001显著性检验。海拔2 000 m以上降水增加较快,且迎风坡多于背风坡。从变异系数的变化来看,流域内降水空间差异不大,近44年存在下降趋势。 |
| 关 键 词： | 降水 时空分布 回归分析 二次函数模型 变异特征 阿克苏河 新疆 |
| 文章编号： | 1001-4675（2008）01-0070-05 |
| 收稿时间： | 2007-01-09 |
| 修稿时间： | 2007-04-12 |
Spatialtemporal Distribution of Precipitation in the Aksu River Basin, Xinjiang |
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| GAO Hui-yun,YANG Qing,LIANG Yan-hong.Spatialtemporal Distribution of Precipitation in the Aksu River Basin, Xinjiang[J].Arid Zone Research,2008,25(1):70-74. | |
| Authors: | GAO Hui-yun YANG Qing LIANG Yan-hong |
| Abstract: | Based on the physiogeographic features in the Aksu River Basin,in this paper the precipitation data observed by 11 meteorological stations in the drainage basin and its vicinities are used to analyze the spatial and temporal change of precipitation in the drainage basin during the period of 1960-2003.The results show that precipitation in the drainage basin has been in an insignificant increase trend since 1960,the liner trend rate is 0.522,and the precipitation has increased in an extent of 13.21 mm/10 a since the 1970s.The interannual change of precipitation is significant and comparatively unstable,and the average coefficient of precipitation change(Cv) is 0.38.Based on DEM data and by using GIDS method as the interpolation formula,it is derived that there is a latitudinal distribution of annual precipitation,and the precipitation is closely related to landforms.The result of regression analysis reveals that there is a quadratic correlation between precipitation and elevation,and the correlation passes the significance test of 0.001.Precipitation increases significantly in a zone over 2 000 m a.s.l.,and the precipitation on windward slope is higher than that on leeward slope.Analyzed from the change of Cv,it is found that the spatial difference of precipitation is not so significant and in a decrease trend since recent 44 years. |
| Keywords: | precipitation spatial and temporal distribution regression analysis quadratic model variation characteristic Aksu River Basin Xinjiang |
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