| 引用本文: | 郑健,鲍婷婷,杨赟,等.参考作物蒸发蒸腾量计算方法在甘肃省不同区域的适用性分析[J].灌溉排水学报,2022,(10):-. |
| Zhengjian,Baotingting,Yangyun,et al.参考作物蒸发蒸腾量计算方法在甘肃省不同区域的适用性分析[J].灌溉排水学报,2022,(10):-. |
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| 摘要: |
| 【目的】为确保参考作物蒸发蒸腾量（ET0）在气象资料短缺情况下数值计算的准确性。【方法】把甘肃省划分为4个区域（I区，河西干旱区、Ⅱ区，陇中北部半干旱区、Ⅲ区，陇中南部半湿润区、Ⅳ区，陇南-甘南湿润区），在此基础上，采用甘肃省26个国家气象站点1980-2019的气象资料，并以FAO-56 Penman Monteith（P-M）法作为计算ET0的标准方法，同时选用Hargreaves-Samani（Har）法、FAO-24 Penman（24PM）法、FAO 1948 Penman（48PM）法、Makkink（Mak）法、Priestley-Taylor（PT）法五种简化方法计算甘肃省各个站点的ET0，对5种简化方法在4个分区的适用性进行分析。【结果】5种简化方法在甘肃省不同分区的计算精度存在明显差异，Har法和Mak法分别与P-M法的相关系数更接近1，表明拟合曲线的拟合程度更好，表现出了较高的计算精度，适用性较好，但Har法在高海拔地区计算精度明显下降；48PM法和24PM法比P-M法计算结果偏大，计算精度居中；PT法计算精度整体较低。不同计算方法在各区的适用性顺序为，I区:Mak法>Har法>48PM法>24PM法> PT法；Ⅱ区、Ⅲ区、Ⅳ区:Har法>Mak法>48PM法>24PM > PT法。【结论】当气象资料出现缺失时，推荐在I区选用Mak法，在Ⅱ区、Ⅲ区和Ⅳ区选用Har法。 |
| 关键词: 参考作物蒸发蒸腾量（ET0）;简化计算方法;适用性分析;甘肃省 |
| DOI： |
| 分类号:S161.4 |
| 基金项目:国家自然科学(51969012)；甘肃省教育厅产业支撑计划项目(2021CYZC-27、2021CYZC-33)；西北低碳城镇支撑技术协同创新中心和兰州理工大学红柳一流学科(0807J1) |
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| Applicability of calculation methods for reference crop evapotranspiration in different regions of Gansu |
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Zhengjian1, Baotingting1, Yangyun2, Chengya1
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1.Lanzhou University of Technology;2.Water Conservancy Research Institute of Linxia Hui Autonomous Prefecture
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| Abstract: |
| 【Objective】In order to realize the accurate calculation of ET0 in the case of shortage of meteorological data. 【Method】Gansu province is divided into four regions: the arid area of Hexi (region I), the semi-arid area in the northern of Longzhong (region II), the semi-humid area in the southern of Longzhong (region III) and the humid area of Longnan and Gannan (region IV). The simplified methods such as Hargreaves-Samani (Har) method, FAO-24 Penman (24PM) method, FAO 1948 Penman (48PM) method, Makkink (Mak) method and Priestley Taylor (PT) method were used to calculate the daily ET0 of 26 national meteorological stations in Gansu Province from 1980 to 2019. And the applicability of the other five methods in four climate zones was evaluated based on the FAO-56 penman Monteith (P-M) method. 【Result】There are obvious differences in the calculation accuracy of the five simplification methods in different districts of Gansu Province. The correlation coefficients of the Har method and the Mak method are closer to 1 respectively with the P-M method, indicating that the fitting degree of the fitted curve is better. It shows high calculation accuracy and good applicability, but the calculation accuracy of the Har method decreases significantly in high altitude areas. The calculation results of 48PM method and 24PM method are larger than that of P-M method, and the calculation results are in the middle. The calculation accuracy of PT method is generally low. Therefore, the order of applicability of the five simplified methods in each division present a trend of Mak method > Har method >48PM method > 24PM method > PT method of the area of I；and the trend of Har method >Mak method > 48PM method > 24PM method >PT method of the area of II, the area of III and IV. 【Conclusion】When there is a lack of meteorological data, it is recommended to use Mak method in the area of I, and it is recommended to use Har method in the area of II, III and IV. |
| Key words: reference crop evapotranspiration; calculation methods; applicability analysis; Gansu Province |
