[1]BAI Juan,YANG Sheng-tian,DONG Guo-tao,et al.Estimation of Daily Evapotranspiration Based on the Multi-Source Remote Sensing Data in the Sanjiang Plain[J].Research of Soil and Water Conservation,2013,20(03):190-195.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
20
Number of periods:
2013 03
Page number:
190-195
Column:
Public date:
2013-06-28
- Title:
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Estimation of Daily Evapotranspiration Based on the Multi-Source Remote Sensing Data in the Sanjiang Plain
- Author(s):
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BAI Juan1, YANG Sheng-tian1, DONG Guo-tao1,2, HAO Fang-hua3, WANG Ming-cheng1,4
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1. State Key Laboratory of Remote Sensing Science, School of Geography, Beijing Normal University, Beijing 100875, China;
2. Institute of Hydraulic Research, YRCC, Zhengzhou 450003, China;
3. State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China;
4. Center for Mountain Ecosystem Studies, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, China
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- Keywords:
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evapotranspiration; remote sensing; FAO Penman-Monteith; Sanjiang Plain
- CLC:
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P426.2
- DOI:
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- Abstract:
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FAO Penman-Monteith model is employed to estimate daily evapotranspiration in growing season (May to September) in the Sanjiang Plain using the multi-source remote sensing data. The estimation is validated with Bowen ratio data. Results show that (1) The model simulations meet the observed data well, with a correlation coefficient of 0.824 and RMSE of 0.493, respectively. (2) In growing season, monthly evapotranspiration in the Sanjiang Plain has a unimodal distribution in temporal and reached a peak in July. The spatial distribution of the actual evapotranspiration is affected by vegetation cover and rainfall amounts. (3) Net radiation and air temperature are the two main factors affecting the variation of daily evapotranspiration rate in the Sanjiang Plain, then are specific humidity and wind speed. Rainfall is the key factor affecting regional evaporation and it can significantly increase the amount of actual evapotranspiration.