| 气象卫星降水数据在时间尺度上的精度检验 |
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| 引用本文： | 魏莎,崔晨风,童山琳,郭元刚.气象卫星降水数据在时间尺度上的精度检验[J].节水灌溉,2017(5). |
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| 作者姓名： | 魏莎 崔晨风 童山琳 郭元刚 |
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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： | 国家国际科技合作专项项目"提高旱区作物水分利用效率的关键技术研究与应用"，国家自然科学基金面上项目"变化环境下西北旱区农业水资源系统的响应模拟及敏感性评估" |
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| 摘 要： | 利用相关系数法及散点斜率法研究气象卫星降水数据在时间尺度上的精度检验。以黑河流域为研究区,利用25个水文站点的实测降水量在年尺度、月尺度和日尺度上验证了气象卫星降水数据的精度。结果表明:在整体上,气象卫星年降水数据和月降水数据与站点实测降水数据相关性很好,在月尺度上相关系数可以到达0.962,数据精度较高,数值上比站点实测降水量偏低,偏差相对较小。气象卫星日降水数据与站点实测降水数据相关性很差,数据精度较低,偏差相对较大。就单个站点而言,大部分站点相关系数较高,但偏差较大。
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| 关 键 词： | 气象卫星 降水数据 精度检验 黑河流域 |
Meteorological Satellite Precipitation Data Accuracy Test on Time Scale |
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| WEI Sha,CUI Chen-feng,TONG Shan-lin,GUO Yuan-gang.Meteorological Satellite Precipitation Data Accuracy Test on Time Scale[J].Water Saving Irrigation,2017(5). |
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| Authors: | WEI Sha CUI Chen-feng TONG Shan-lin GUO Yuan-gang |
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| Abstract: | In this paper, the correlation coefficient and the scatter slope method is used as evaluation tool, the Heihe River Basin is taken as the study area, and the measured precipitation data in 25 hydrological stations is used to verify the accuracy of meteorological precipitation data on the year scale, month scale, and day scale.The results show: on the whole, the yearly and monthly precipitation data of the meteorological satellite has good correlation with the site observed precipitation data, the correlation coefficient can reach 0.962 on the month scale, the data accuracy is high, the value of the meteorological satellite data is a little lower than that of the site observed data, and the difference is small;while the correlation between the daily precipitation data of the meteorological satellite and the site observed data is bad, the data accuracy is low, and the difference is big;regarding to a single site, the correlation coefficient of most of the sits are high, but the difference is big. |
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| Keywords: | meteorological satellite precipitation data accuracy test Heihe river basin |
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