Budyko假设在灌区耗水估算的适用性

林一凡; 霍再林; 汪超子; 张成龙; 韩振中; 崔静

引用本文:	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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Budyko假设在灌区耗水估算的适用性
林一凡,霍再林,汪超子,等
1.中国农业大学水利与土木工程学院;2.中国灌溉排水发展中心

摘要:

【目的】验证Budyko假设在农业灌区的适用性，为准确估计灌区实际耗水提供新方法。【方法】基于全国282个大中型灌区2010-2017年的灌溉量、降水量、潜水蒸发量及实际蒸散发量，验证了Budyko假设对农业灌区耗水估算的适用性，对比分析不同气候条件下的估算准确性。【结果】Budyko假设框架下考虑灌溉水及潜水蒸发量的傅抱璞公式能够较好地估算灌区年度耗水，估算ET与实测ET之间的相对误差小于21.7%。比较而言，该公式在种植结构和灌溉制度较为稳定的湿润区具有更好的适用性。同时，受气象条件、灌区输配水条件、土壤质地、作物种植结构等要素的影响，Budyko水热耦合模型的参数ω具有显著的区域分布特征，表现为随湿润程度增加而增大。【结论】Budyko假设在全国农业灌区年耗水量估算中具有很好的潜力。

关键词: Budyko假设;灌区;耗水;气候

DOI：

分类号:S1

基金项目:国家自然科学基金重点项目(52130902)

The Applicability of Budyko Framework for Evapotranspiration Estimation in Irrigation Districts of China

LIN Yifan^1,2, HUO Zailin^1,2, WANG Chaozi^1,2, ZHANG Chenglong^1,2, HAN Zhenzhong³, CUI Jing³

1.Collge of Water Resources &2.Civil Engineering, China Agricultural University;3.Irrigation and Drainage Development Center

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