基于Penman-Monteith模型的低丘红壤区稻田蒸散模拟

doi:10.3969/j.issn.1000-6362.2020.04.002

摘要/Abstract

摘要： 基于低丘红壤区稻田波文比仪测量值和小气候观测资料，将8种组合形式的Jarvis公式和Irmak公式应用到Penman-Monteith模型中，组成9种蒸散模型，模拟稻田全生育期的逐时蒸散量，以波文比仪观测的蒸散量作为实测值检验模型精度。结果表明：PM_Irmak模型对水稻全生育期的蒸散模拟效果在所有模型中最好，均方根误差和平均绝对误差最小，分别为0.064和0.049mm·h-1 ，确定系数、纳什效率系数和一致性指数最高，分别为0.940、0.922和0.953。8种PM_Jarvis模型模拟蒸散的日动态变化值在水稻返青期均明显小于实测值，PM_Irmak模型模拟蒸散的日动态变化值在整个生育期与实测值均较为接近。由此可见，Irmak公式应用到PM模型后模拟精度较高，可为低丘红壤区稻田蒸散研究提供参考。

关键词: , 冠层阻力, 蒸散, Jarvis, Irmak, Penman-Monteith模型

Abstract: Fully understanding the evapotranspiration of paddy field was conducive to making a reasonable irrigation plan and improving the water use efficiency of paddy field. Therefore, the purpose of discussing the applicability of evapotranspiration estimation model in paddy field of low hilly red soil area was to select the actual evapotranspiration model which was more suitable for paddy field of study area and estimate the evapotranspiration accurately. Based on the measured values of the Bowen ratio system and microclimate data of the paddy field in the low hilly red soil region, eight combined forms of Jarvis formula and Irmak formula were applied to Penman-Monteith model, and nine types of evapotranspiration models were obtained. Firstly, the key parameters in the nine models were calibrated with the measured data in 2014, the hourly ET during the full growth stages in 2015 calculated by the nine model was compared to the observed ET with the Bowen ratio system. In the PM_Jarvis model with eight combined forms, the range of certainty coefficient was 0.823?0.894, the range of consistency index was 0.769?0.865, the nash efficiency coefficient was 0.807?0.903, the range of root mean square error and mean absolute error were 0.084?0.110 mm·h-1 and 0.054?0.070 mm·h-1, respectively. In the PM_Irmak model, the certainty coefficient was 0.940, the consistency index was 0.953, the nash efficiency coefficient was 0.922, the root mean square error and mean absolute error were 0.064mm·h-1and 0.049mm·h-1, respectively. These statistical parameters indicated that predicting hourly ET with the PM_Irmak model performed better than the PM_Jarvis. The diurnal dynamic values of ET simulated by eight PM_Jarvis models were significantly lower than the measured values in regreening stage of rice, the performance of the PM_Irmak model was much better in the regreening stage and diurnal dynamic values were close to the measured values in the whole growth stage. Overall, the PM_Irmak model was a promising model to predict the actual ET, which could provide reference for the evapotranspiration study of paddy field in low hilly red soil area.

Key words: Canopy resistance, Evapotranspiration, Jarvis, Irmak, Penman-Monteith model

中图分类号:

文建川，景元书，韩丽娟. 基于Penman-Monteith模型的低丘红壤区稻田蒸散模拟[J]. 中国农业气象, 2020, 41(04): 201-210.

WEN Jian-chuan, JING Yuan-shu, HAN Li-juan. Simulation of Evapotranspiration for Paddy Rice in Low Hilly Red Soil Region Base[J]. Chinese Journal of Agrometeorology, 2020, 41(04): 201-210.

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