[1]BAO Lingling,YANG Yonggang,LIU Jianjun,et al.Calculation of Reference Crop Evapotranspiration in Chongqing Based on 5 Artificial Intelligent Models[J].Research of Soil and Water Conservation,2021,28(01):85-92.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 01
Page number:
85-92
Column:
Public date:
2021-01-10
- Title:
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Calculation of Reference Crop Evapotranspiration in Chongqing Based on 5 Artificial Intelligent Models
- Author(s):
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BAO Lingling1, YANG Yonggang1, LIU Jianjun1, ZHANG Weihua
2
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(1.Chongqing Surveying and Design Institute of Water Resources, Electric Power and Architecture, Chongqing 400020, China; 2.College of Resources and Environment, Southwest University, Chongqing 400715, China)
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- Keywords:
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Chongqing; reference crop evapotranspiration; artificial intelligent models; empirical model; sunshine hours
- CLC:
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S161.4
- DOI:
-
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- Abstract:
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In order to obtain the optimal model for calculating reference crop evapotranspiration(ET0)in Chongqing, the five artificial intelligent models such as support vector machines(SVM), Gaussian exponential model(GEM), random forest model(RF), extreme learning machine model(ELM)and generalized regression neural network model(GRNN)were used as the calculation models. Based on the daily meteorological data from Fengdu, Fengjie, Shapingba, Wanzhou, and Youyang from 1991 to 2016, the daily and monthly ET0 under different combinations of meteorological parameter inputs were estimated, and compared with the calculation results of the standard model Penman-Monteith(PM). The results show that the accuracies of different models are different; under the input of the same meteorological parameters, the calculation accuracy of the artificial intelligence model is higher than that of the empirical model; the error index of the GEM model is the lowest and the consistency index is the highest. Sunshine duration is the most critical factor impacting the accuracy of modeling and change in ET0 in Chongqing. GEM model is the optimal artificial intelligence model to estimate ET0 in Chongqing.