| Cite this article: | 林一凡,霍再林,汪超子,等.Budyko假设在灌区耗水估算的适用性[J].灌溉排水学报,2022,(10):-. |
| LIN Yifan,HUO Zailin,WANG Chaozi,et al.Budyko假设在灌区耗水估算的适用性[J].灌溉排水学报,2022,(10):-. |
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| The Applicability of Budyko Framework for Evapotranspiration Estimation in Irrigation Districts of China |
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LIN Yifan1,2, HUO Zailin1,2, WANG Chaozi1,2, ZHANG Chenglong1,2, HAN Zhenzhong3, CUI Jing3
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1.Collge of Water Resources &2.Civil Engineering, China Agricultural University;3.Irrigation and Drainage Development Center
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| Abstract: |
| 【Objective】Applicability of the expanded Budyko framework in agricultural irrigation areas was tested. This study provides a new method for accurately estimating actual evapotranspiration in irrigation areas. 【Method】Applicability of Budyko framework for evapotranspiration estimation in agricultural irrigation areas were tested based on lots data including irrigation, precipitation, groundwater evaporation and actual evapotranspiration from 2010 to 2017 in domestic 282 irrigation areas in China, and the estimation accuracy under different climatic conditions was analyzed.【Result】Budyko framework, the Fu's equation, considering irrigation and groundwater evaporation could estimate the annual evapotranspiration of the irrigation districts well. The mean relative error between the estimated ET and the measured ET is less than 21.7%. In comparison, the estimation accuracy is higher in the humid area where the planting structure and irrigation regime are relatively stable. Influenced by meteorological conditions, water supply and distribution conditions in irrigation districts, soil texture, and crop planting structure, the parameter ω of Budyko curves has significant regional distribution characteristics and it increases with the improvement of humidity. 【Conclusion】The Budyko framework has excellent potential in estimating annual evapotranspiration in agricultural irrigation districts of China. |
| Key words: Budyko framework; irrigation districts; evapotranspiration; climate |
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