Estimation of monthly reference evapotranspiration using novel hybrid machine learning approaches

[1 ] Leghyd Laboratory, Department of Civil Engineering, University of Sciences and Technology Houari Boumediene, Algiers, Algeria

[2 ] Department of Soil and Water Conservation Engineering, College of Technology, G.B. Pant University of Agriculture and Technology, Pantnagar, India

[3 ] School of Technology, Ilia State University, Tbilisi, Georgia