| 改进Hargreaves方法计算拉萨参考作物蒸发蒸腾量 |
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| 引用本文： | 杨永红,张展羽.改进Hargreaves方法计算拉萨参考作物蒸发蒸腾量[J].水科学进展,2009,20(5):614-618. |
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| 作者姓名： | 杨永红 张展羽 |
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| 作者单位： | 1.河海大学农业工程学院, 江苏, 南京, 210098; |
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| 基金项目： | 西藏自治区科学技术厅中青年自然基金资助项目，西藏农牧学院青年基金 |
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| 摘 要： | 根据拉萨站1955~2006年逐日气象资料,采用标准Penman-Monteith方程和Hargreaves方法对西藏高原区拉萨的参考作物蒸发蒸腾量(ET0)进行了对比分析研究,计算结果发现在拉萨的春季和雨季采用Hargreaves方法计算的ET0存在着较大偏差.为了进一步提高Hargreaves方法在该地区的适宜性,引入了平均相对湿度因子,建立改进Hargreaves公式并进行了评价,为拉萨地区准确实用地确定作物需水量和合理的灌溉制度提供了一种简便方法和科学依据.
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| 关 键 词： | 参考作物蒸发蒸腾量 Penman-Monteith方程 湿度 数据处理 改进Hargreaves方法 |
| 收稿时间： | 2008-09-07 |
Method for calculating Lhasa reference crop evapotranspiration by modifying Hargreaves |
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| YANG Yong-hong,ZHANG Zhan-yu.Method for calculating Lhasa reference crop evapotranspiration by modifying Hargreaves[J].Advances in Water Science,2009,20(5):614-618. |
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| Authors: | YANG Yong-hong ZHANG Zhan-yu |
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| Institution: | 1.College of Agricultural Engineering, Hohai university, Nanjing 210098, China;2.Tibet Agriculture and Animal Husbandry College, Linzhi 860000, China |
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| Abstract: | In this article,we analyze comparatively the two results from Penman-Monteith and Hargreaves of Lhasa reference crop evapotranspiration(ET0) based on the data from Lhasa weather stations during 1955-2006.The calculated results show the Hargreaves method still has a large deviation in Lhasa in spring and rainy seasons.To further enhance the appropriateness of the Hargreaves methods in Lhasa,we establish and evaluate the method of modifying Hargreaves by introducing the humidity factor,it thus provide a simple method and scientific proof for the accurately determining the water demand of cropand the irrigation schedule in Lhasa region. |
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