| 参考作物蒸发蒸腾量计算简化方法 |
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| 作者姓名： | 吴宏霞 彭世彰 徐俊增 |
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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,河海大学水文水资源与水利工程科学国家重点实验室,河海大学水文水资源与水利工程科学国家重点实验室 河海大学现代农业工程系江苏南京 210098,河海大学现代农业工程系江苏南京 210098,河海大学现代农业工程系江苏南京 210098 |
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| 基金项目： | 国家高技术研究发展计划(“863计划”)“南方季节性缺水灌区(江西省鹰潭)节水农业综合技术体系集成与示范”课题(2002AA2Z4331) |
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| 摘 要： | 基于国家“863”节水农业重大专项子课题示范现场的气象资料,对参考作物蒸发蒸腾量及其影 响因素进行了相关性分析。选取净辐射和空气饱和差建立了参考作物蒸发蒸腾量的简化计算公式,并引 入风速函数进行修正。研究结果表明:参考作物蒸发蒸腾量与净辐射相关系数最大,然后依次是空气饱 和差、日照时数和温度;且与净辐射和空气饱和差呈直线关系,与日照时数和温度呈指数关系,而与相对 湿度呈负相关关系;考虑风速修正后的简化公式与标准方法(FA056 Penman-Monteith)的计算结果有较 高的一致性。
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| 关 键 词： | 参考作物蒸发蒸腾量 简化计算 修正 |
Simplified Method of Reference Evapotranspiration Calculation |
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| Authors: | Wu Hongxi Peng Shizhang Xu Junzeng |
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| Institution: | 1State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, 2Department of Modern Agriculture Engineering, Hohai University, Nanjing 210098 |
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| Abstract: | Based on the meteorological data derived from the national "863" special project, relationship between reference evapotranspiration(ET0) and the effected factors was analyzed. Net radiation (Rn) and vapor pressure deficit (VPD) were selected as influence factors to construct the regressive formula to calculate ETO. Then the influence of wind was considered. Results show that: Rn is the greatest influence factor, following by VPD, sunshine hour (N) and temperature (T). Liner relationship is found between ET0 and Rn or VPD, exponential relationship between ET0 and N or T, and negative relative relationship to relative humidity (Rh). Simplified fomular modified by wind can get great coherence with Penman-Monteith method commended by FAO. |
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| Keywords: | Reference evapotranspiration Simplifed calculation Modification |
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