| 用Hargreaves法与Penman-Monteith法计算ET_0——以太湖流域的应用为例 |
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| 引用本文： | 刘宏伟,余钟波.用Hargreaves法与Penman-Monteith法计算ET_0——以太湖流域的应用为例[J].水资源保护,2010,26(1):6-8. |
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| 作者姓名： | 刘宏伟 余钟波 |
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| 作者单位： | 河海大学水文水资源与水利工程科学国家重点实验室,江苏,南京,210098 |
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| 基金项目： | 国家自然科学基金，教育部长江学者和创新团队发展计划 |
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| 摘 要： | 为了在太湖流域找到一种适合资料缺乏地区的蒸散发计算方法,利用太湖以西宜兴市梅林试验区的气象监测资料,以PM(Penman-Monteith)公式为标准,评价Hargreaves方法计算潜在蒸散发量(ET0,即参考蒸散发量)的效果。结果表明:在太湖流域应用Hargreaves方法计算的ET0与PM方法的计算结果吻合较好。Hargreaves法在日、旬、月尺度上结果与PM法结果均保持较好的变化趋势及峰值的一致性,误差随计算时间段的延长而减小。在阴雨天较多的夏季采用Hargreaves方法计算ET0,结果会明显偏高。两种方法具有很好的相关性,可以此为依据建立修正方程。经过线性回归方程修正的Hargreaves法计算结果平均相对误差明显下降,并且以日ET0结果改进最多。
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| 关 键 词： | 潜在蒸散发量 参考蒸散发量 Penman-Monteith法 Hargreaves法 太湖流域 |
| 修稿时间： | 2010/3/1 0:00:00 |
Application of Hargreaves and Penman-Monteith Equation to estimating ET_0:A case study in Taihu Basin |
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| LIU Hong-wei,YU Zhong-bo.Application of Hargreaves and Penman-Monteith Equation to estimating ET_0:A case study in Taihu Basin[J].Water Resources Protection,2010,26(1):6-8. |
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| Authors: | LIU Hong-wei YU Zhong-bo |
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| Affiliation: | LIU Hong-wei,YU Zhong-bo(State Key Laboratory of Hydrology Water Resources , Hydraulic Engineering,Hohai University,Nanjing 210098,China) |
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| Abstract: | In order to find a suitable method for estimating evapotranspiration for data-deficient areas in Taihu Basin,the effect of the Hargreaves equation on estimating ET0(potential evapotranspiration or reference evapotranspiration) was assessed using the Penman-Monteith(PM) equation,recommended by the FAO as a standard method,with field measurement data from Meilin watershed near Yixing on the west side of Taihu Lake.The results showed that the two methods agree with each other.The Hargreaves results showed tren... |
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| Keywords: | potential evapotranspiration reference evapotranspiration Penman-Monteith method Hargreaves method Taihu Basin |
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