Environmental Processes

, Volume 6, Issue 1, pp 309–319 | Cite as

Predicting Daily Pan Evaporation (Epan) from Dam Reservoirs in the Mediterranean Regions of Algeria: OPELM vs OSELM

  • Abderrazek Sebbar
  • Salim HeddamEmail author
  • Lakhdar Djemili
Short Communication


In the present study, we propose the application of two artificial intelligence models, namely: (i) the optimally pruned extreme learning machine (OPELM); and (ii) the online sequential extreme learning machine (OSELM) models, for estimating daily pan evaporation (Epan). The two models were developed and compared using four climatic data collected at two stations: Ain Dalia and Zit Emba. The maximum and minimum temperatures (Tmax, Tmin), wind speed (U2), relative humidity (RH %) and Epan data were used as inputs to the models. Pan evaporation Epan was directly measured using Class A evaporation pan. The results show that the two models provided different results at the two stations: the OPELM worked well at Ain Dalia while OSELM was more accurate at Zit Emba. More importantly, the inclusion of the periodicity did not lead to a significant improvement in the accuracy of the models. OSELM validation results, with a coefficient of correlation R = 0.872, a root mean square error RMSE =1.698 mm, and a mean absolute error MAE = 1.311 mm outperformed OPELM (R = 0.853, RMSE = 1.813 mm and MAE = 1.403 mm) at Zit Emba. In addition, at Ain Dalia, the results indicate that OPELM model provided slightly higher prediction accuracy compared to the OSELM model (R = 0.808 against 0.800; RMSE = 1.447 mm against 1.471 mm; MAE = 1.091 mm against 1.084 mm). This work demonstrates the ability of the OPELM and OSELM approaches for estimating daily Epan using easily measured climatic variables.


Modelling Epan Climatic variables Algeria, extreme learning machine OPELM OSELM 



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© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Soil and Hydraulics Research Laboratory, Faculty of Engineering Sciences, Hydraulics DepartmentUniversity Badji-Mokhtar AnnabaAnnabaAlgeria
  2. 2.Faculty of Science, Agronomy DepartmentHydraulics Division UniversitySkikdaAlgeria
  3. 3.Research Laboratory of Natural Resources and Adjusting, Faculty of Engineering Sciences, Hydraulics DepartmentUniversity BADJI-MOKHTAR AnnabaAnnabaAlgeria

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