Simulation of irrigation in southern Ukraine incorporating soil moisture state in evapotranspiration assessments

The paper studies the accuracy of modeling moisture transport under conditions sprinkler irrigation using evapotranspiration assessment methods that take into account soil conditions. Appropriate modifications Penman-Monteith and Priestley-Taylor models are considered. Moisture is performed Richards equation in its integer- fractional-order forms. Parameters identification by particle swarm optimization algorithm based on readings suction pressure sensors. Results for two periods 11 50 days demonstrate possibility up to ~20% increase simulation a modified model when maintained range content root layer 70%-100% field capacity. When 80%-100% capacity, consideration within did not enhance accuracy. This confirms independence from at levels above 80% capacity as this case actual reaches level close potential one. Scenario entire growing season with subsequent estimation crop (maize) yield showed regimes generated models, which data, potentially provide higher yields lower water supply.