| 中国不同气候区域Hargreaves模型的修正 |
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| 引用本文： | 张本兴,潘云,李小娟.中国不同气候区域Hargreaves模型的修正[J].地理与地理信息科学,2012,28(1):51-54,113. |
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| 作者姓名： | 张本兴 潘云 李小娟 |
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| 作者单位： | 首都师范大学城市环境过程与数字模拟国家重点实验室培育基地;首都师范大学资源环境与地理信息系统北京市重点实验室;首都师范大学三维信息获取与应用教育部重点实验室,北京100048 |
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| 基金项目： | 国际科技合作项目，国家自然科学基金，北京市自然科学基金，水利部公益性行业科研专项 |
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| 摘 要： | 在计算参考作物蒸散量的模型中,FAO Penman-Monteith模型计算准确但需要气象参量过多,而Hargreaves模型只需要气温数据却无法保证较高的准确性。为了提高Hargreaves模型在中国不同气候类型条件下的适用性,以FAO Penman-Monteith模拟值为参考,建立了Hargreaves模型的修正系数。CLIMWAT数据库中156个站点的应用表明,修正前R2、RMSE分别为88.1%、3.803mm/d,修正后分别为97.3%、0.233mm/d;北京站多年的应用表明,修正前R2、RMSE分别为94.4%、4.861mm/d,修正后分别为97.2%、0.442mm/d。在此基础上,利用GIS分区运算工具建立了中国不同气候区域的修正系数表。研究结果有助于提高常规气象观测条件下(无风速、辐射观测)不同气候区域参考作物蒸散量的估算精度。
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| 关 键 词： | Penman-Monteith模型 Hargreaves模型 气候区域 GIS分区运算 |
Revision Coefficient of Hargreaves Model and Its Values in Different Climatic Regions of China |
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| ZHANG Ben-xing
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PAN Yun
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LI Xiao-juan.Revision Coefficient of Hargreaves Model and Its Values in Different Climatic Regions of China[J].Geography and Geo-Information Science,2012,28(1):51-54,113. |
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| Authors: | ZHANG Ben-xing PAN Yun LI Xiao-juan |
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| Institution: | (Base of the State Laboratory of Urban Environmental Processes and Digital Modeling,Beijing Key Lab of Resources Environment and GIS,MOE Key Lab of 3-D Information Acquisition and Application,Capital Normal University,Beijing 100048,China) |
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| Abstract: | In the models of calculate reference crop evapotranspiration,FAO Penman-Monteith model calculates exactly but needs meteorological parameters too much.Hargreaves model just needs temperature which can’t guarantee higher accuracy.To improve the applicability of Hargreaves model in different climatic types in China,this paper establishes revision coefficient of Hargreaves model taking FAO Penman-Monteith models for reference.According to the applies of 156 stations of CLIMWAT Database,before revising,R2 and RMSE are 88.1% and 3.803 mm/d while after revising,R2 and RMSE are 97.3% and 0.233 mm/d.Based on the applies of data of years in Beijing,before revising,R2 and RMSE are 94.4% and 4.861 mm/d while after revising,R2 and RMSE are 97.2% and 0.442 mm/d.On this basis,the table of revision coefficient is made in different climatic regions of China using zonal tool of GIS.Research results contribute to enhance the accuracy of estimating the reference crop evapotranspiration in different climatic regions under conditions of common meteorological observation(no data of wind and radiation). |
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| Keywords: | Penman-Monteith model Hargreaves model climatic region GIS zonal analysis |
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