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| 遥感Penman-Monteith模型对区域蒸散发的估算 | |
| 引用本文： | 李红霞,张永强,张新华,黎小东,敖天其. 遥感Penman-Monteith模型对区域蒸散发的估算[J]. 武汉大学学报(工学版), 2011, 44(4): 457-461 |
| 作者姓名： | 李红霞 张永强 张新华 黎小东 敖天其 |
| 作者单位： | 1. 四川大学水利水电学院,四川成都610065／四川大学水力学与山区河流开发保护重点实验室,四川成都610065 2. CSIRO Land and Water,Canberra ACT Australia 2601 3. 四川大学水力学与山区河流开发保护重点实验室,四川成都,610065 4. 四川大学水利水电学院,四川成都,610065 |
| 基金项目： | 国家自然科学基金项目(编号:50979062); 国家科技重大水专项(编号:2008ZX07526-004-T007;2009ZX07212-002-003;2009ZX07104-001); 四川大学青年教师科研启动基金(编号:2009SCU11079) |
| 摘 要： | 引入了基于MODIS叶面指数的Penman-Monteith(P-M)模型,实现了对区域尺度上日蒸散发的有效估算,并同时实现了对植被蒸腾和土壤蒸发的分别估算.对澳大利亚东南区域的流域410061的蒸散发的研究表明,利用此模型模拟的蒸散发与实测蒸散发有很好的一致性,日蒸散发拟合的R2为0.80,Nash-Sutcliffe有效性系数为0.77.在总的蒸散发中,蒸腾约占70%,蒸发约占30%,蒸腾作用强于蒸发.研究结果证明了基于遥感叶面指数的Penman-Monteith模型可以很好地估算区域尺度的日蒸散发. |
| 关 键 词： | 遥感 叶面指数 蒸散发 Penman-Monteith方程 |
Estimation of regional transpiration and evaporation using Penman-Monteith equation |
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| LI Hongxia,,ZHANG Yongqiang,ZHANG Xinhua,LI Xiaodong,AO Tianqi. Estimation of regional transpiration and evaporation using Penman-Monteith equation[J]. Engineering Journal of Wuhan University, 2011, 44(4): 457-461 | |
| Authors: | LI Hongxia ZHANG Yongqiang ZHANG Xinhua LI Xiaodong AO Tianqi |
| Affiliation: | LI Hongxia1,2,ZHANG Yongqiang3,ZHANG Xinhua2,LI Xiaodong1,AO Tianqi2(1.School of Water Resources & Hydropower,Sichuan University,Chengdu 610065,China,2.State Key Laboratory of Hydraulics and Mountain River Engineering,3.CSIRO Land and Water,Canberra ACT Australia 2601) |
| Abstract: | Remotely sensed data is one of the best ways to determine spatially distributed evapotranspiration fluxes.We introduce a simple biophysical model for use remotely sensed leaf area index data and the Penman-Monteith equation to calculate daily-average evapotranspiration,based on our understanding of radiation absorption by plant canopies and evaporation from the underlying soil surface.Modelled daily evapotranspiration compared well with measurents,indicated by a R2 of 0.80 and the Nash-Sutcliffe coefficient... |
| Keywords: | remote sensing leaf area index evapotranspiration Penman-Monteith equation |
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