| 应用Shuttleworth-Wallace模型对夏玉米农田蒸散的估计 |
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| 引用本文： | 贾红,胡继超,张佳宝,朱安宁. 应用Shuttleworth-Wallace模型对夏玉米农田蒸散的估计[J]. 灌溉排水学报, 2008, 27(4) |
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| 作者姓名： | 贾红 胡继超 张佳宝 朱安宁 |
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| 作者单位： | 南京信息工程大学,应用气象学院,南京,210044;中国科学院,封丘农业生态国家实验站,河南,封丘,453300;中国科学院,南京土壤研究所,土壤与农业可持续发展国家重点实验室,南京,210008;中国科学院,封丘农业生态国家实验站,河南,封丘,453300 |
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| 基金项目： | 中科院野外台站基金 , 江苏省自然科学基金资助项目 |
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| 摘 要： | 根据夏玉米生长季内逐时波文比系统观测资料和主要生育期的作物资料,以波文比-能量平衡法(BREB法)得到的蒸散量为实测值,对比研究了Shuttleworth-Wallace模型(以下简称S-W模型)、Penman-Monteith模型(以下简称P-M模型)对蒸散估计的差异。S-W模型因考虑了土壤蒸发,估算的逐时逐日蒸散值均比P-M模型有更好的精度。在作物生长前期,LAI(<2.0)较低,应用S-W模型在稀疏冠层下估算的蒸散量高于P-M方程,更接近于实测值,与实测值的相关系数更高,RMSE值低。随着LAI的增大,冬小麦冠层密闭,S-W模型和P-M方程估算的蒸散与实测值均相接近,二模型均有良好表现。对S-W模型的各阻力参数进行敏感性分析,分析结果表明,应用S-W模型时,模型对阻力参数冠层气孔阻力最为敏感,土壤表面阻力次之,作物冠层高度与参考高度间空气动力学阻力敏感程度居中,对地表与冠层高度间空气动力学阻力、冠层内边界阻力不敏感。在应用已有经验关系式时,特别需要注意对冠层气孔阻力、土壤表面阻力这二阻力参数中经验系数的合理确定。
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| 关 键 词： | 蒸散 SlluttlewortH-Wallace模型 Penman-Monteith模型 夏玉米 |
Estimation of Evapotranspiration during the Maize Growing Season Using the Shuttleworth-Wallace Model |
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| JIA Hong,HU Ji-chao,ZHANG Jia-bao,ZHU An-ning. Estimation of Evapotranspiration during the Maize Growing Season Using the Shuttleworth-Wallace Model[J]. Journal of Irrigation and Drainage, 2008, 27(4) |
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| Authors: | JIA Hong HU Ji-chao ZHANG Jia-bao ZHU An-ning |
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| Affiliation: | JIA Hong1,HU Ji-chao1,ZHANG Jia-bao2,3,ZHU An-ning2 (1.College of Applied Meteorology,Nanjing University of Information Science & Technology,Nanjing 210044,China,2.State Experimental Station for Agro-Ecology,Chinese Academy of Sciences,Fengqiu 453300,3.State Key Laboratory of Soil , Sustainable Agriculture,Institute of Soil Science,Chinese Academy of Science,Nanjing 210008,China) |
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| Abstract: | Based on the Bowen ratio energy balance(BREB) measurements during 2004~2005 entire maize growing season,the performance of hourly and daily evapotranspiration(ET) was estimated by both the Shuttleworth-Wallace model and the Penman-Monteith model.To account for soil evaporation,the S-W model was found to be in better agreement with hourly and daily BREB ET values than the P-M model.There are higher linear regression coefficient and lower values of the root mean square error(RMSE) between ET data from the S-W... |
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| Keywords: | evapotranspiration Shuttleworth-Wallace model Penman-Monteith model maize |
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