Service-oriented approach for modeling and estimating reference evapotranspiration

Software used for estimating reference evapotranspiration (ET₀) has been developing in various directions. The main goal of this paper is to present an approach based on Service-Oriented Architecture (SOA) paradigm for modeling and estimating ET₀. The FAO-56 Penman-Monteith (FAO-56 PM) and Hargreaves equation are used for estimating monthly ET₀.The weather data for this study were obtained from CIMIS for Davis weather station. The FAO-56 PM and Hargreaves ET₀ values estimated using ET Web service were compared to corresponding CIMIS PM ET₀ estimates. The proposed model based on Web services implemented to the FAO-56 PM and Hargreaves equations has good performances and can be used in estimating ET₀ and has ability to complete missing weather data.