| Applying SEBAL model and P—M Equation to estimate land-surface evapotranspiration over lower reaches of Wuyu’er River |
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| DOI：10.7606/j.issn.1000-7601.2009.05.39 |
| Key Words: remote sensing evapotranspiration SEBAL P-M Equation crop coefficient |
| Author Name | Affiliation | | ZENG Lihong | Northeast Institute of Geography and Agricultural Ecology Chinese Academy of Sciences, Changchun, Jilin 130012, China；Graduate University of Chinese Academy of Sciences, Beijing 100049, China | | SONG Kaishan | Northeast Institute of Geography and Agricultural Ecology Chinese Academy of Sciences, Changchun, Jilin 130012, China | | ZHANG Bai | Northeast Institute of Geography and Agricultural Ecology Chinese Academy of Sciences, Changchun, Jilin 130012, China | | WANG Zongming | Northeast Institute of Geography and Agricultural Ecology Chinese Academy of Sciences, Changchun, Jilin 130012, China | | DU Jia | Northeast Institute of Geography and Agricultural Ecology Chinese Academy of Sciences, Changchun, Jilin 130012, China；Graduate University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: |
| Daily evapotranspiration (ET) of 1992-07-09, 1994-07-15, 1995-07-18 and 1999-07-13 was estimated by using SEBAL model over lower reaches of Wuyu'er River.Monthly ET of July for each phase was obtained by using P-M equation and crop coefficient.Lastly, characteristics of daily ET, monthly ET, crop coefficient and their affecting factors were analyzed.The results indicated that: the frequency distribution maps of daily ET had two distinct apices, one was caused by the evapotranspiration characteristics of dry-land, and the other was caused by wetland and water-body;according to mean daily ET the sequence from high to low was 1994-07-15, 1999-07-13, 1995-07-18 and 1992-07-09;the phase of 1994-07-15 presented the highest mean daily ET and mean crop coefficient;daily mean wind velocity, sunshine time and minimum daily air temperature played great influence on daily reference evapotranspiration.This study would provide important reference for the study of crop water requirement, ecological water demand, evapotranspiration characteristics of different land-use types and water resources management over the study area. |
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