| 两种Penman-Monteith公式计算草坪草参考腾发量的适用性 |
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| 引用本文： | 徐俊增,彭世彰,张行南,丁加丽,王卫光.两种Penman-Monteith公式计算草坪草参考腾发量的适用性[J].农业工程学报,2009,25(12):32-37. |
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| 作者姓名： | 徐俊增 彭世彰 张行南 丁加丽 王卫光 |
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| 作者单位： | 1. 河海大学水文水资源与水利工程科学国家重点实验室,南京,210098
2. 南通市水利局,南通,226006 |
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| 基金项目： | 国家863计划项目（2006AA100202）；国家自然科学基金重点项目（50839002） |
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| 摘 要： | 为了揭示ASCE和FAO56两种Penman-Monteith公式在计算小时参考作物腾发量（ET0）时的差异，开展了充分供水草坪草腾发量观测试验。基于自动气象站的小时气象数据和蒸渗仪试验结果，在对比两公式计算结果差异基础上，以实测的日草坪腾发量为标准评价了2种计算公式小时ET0的日累积结果及以日的计算结果。结果表明：2种Penman-Monteith公式计算的小时ET0结果存在一定差异，ET0较高的时段差异也比较大。白天FAO56 Penman-Monteith公式的计算结果低于ASCE Penman-Monteith公式的计算结果，夜晚则正好相反，原因在于Cd取值的差异。与实测日ET0结果相比2种公式小时时段的ET0结果的累积值误差均比较大，ASCE的改进并没有使Penman-Monteith在计算结果上取得实质性的改进，相比之下以日为时段的Penman- Monteith公式（ASCE同FAO56）取得了与实测结果最为一致的效果。进一步根据实测的小时ET0数据以及更长序列的日ET0实测结果，评价FAO56 Penman-Monteith和ASCE Penman-Monteith结果的地区适用性将是今后研究内容之一。
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| 关 键 词： | 作物，蒸腾，水分，参考作物蒸发蒸腾量，Penman-Monteith，草坪草 |
| 收稿时间： | 2009/3/11 0:00:00 |
| 修稿时间： | 4/1/2009 12:00:00 AM |
Applicability of FAO56 and ASCE Penman-Monteith equations for reference crop evapotranspiration calculation on turf grass |
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| Xu Junzeng,Peng Shizhang,Zhang Xingnan,Ding Jiali and Wang Weiguang.Applicability of FAO56 and ASCE Penman-Monteith equations for reference crop evapotranspiration calculation on turf grass[J].Transactions of the Chinese Society of Agricultural Engineering,2009,25(12):32-37. |
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| Authors: | Xu Junzeng Peng Shizhang Zhang Xingnan Ding Jiali and Wang Weiguang |
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| Institution: | 1. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China,1. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China,1. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China,2. Bureau of Water Conservancy, Nantong 226006, China and 1. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China |
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| Abstract: | In order to reveal the difference between hourly reference crop evapotranspiration(ET0) calculated by FAO56 Penman- Monteith equation and that by ASCE Penman-Monteith , as well as the 24-hour accumulated daily ET0, well watered lysimeter experiment were carried out on turf grass. Hourly ET0 and 24-hour accumulated daily ET0 were calculated based on hourly meteorological data and evaluated by using daily observed grass evapotranspiration derived from well watered lysimeter experiment. There was a certain difference between ET0 calculated by FAO56 Penman-Monteith equation and that by ASCE Penman-Monteith equation, and the difference was more significant when the ET0 values were relative higher. Hourly ET0 were tested to be lower for FAO56 Penman-Monteith equation than for ASCE Penman-Monteith equation in daytime, but just reversed at night. That was ascribed to the difference in Cd values. It was a pity to say that the equation mended by ASCE could not result in improvement in hourly ET0 calculation, when the 24-hour accumulated daily ET0 were compared with observed daily grass evapotranspiration. Daily ET0 calculated by Penman-Monteith equation based on meteorological data at daily time step were test to be the most consistent with that by lysimeter observed. Further evaluation of either FAO56 Penman-Monteith equation or ASCE Penman-Monteith equation was urgent in China, based on hourly or long series daily observed grass evapotranspiration. |
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| Keywords: | crops evapotranspiration water reference crop evapotranspiration Penman-Monteith turf grass |
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