Sizing Farm Reservoirs for Supplemental Irrigation of Corn. Part I: Modeling Reservoir Size Yield Relationships

ABSTRACT A simulation model combining a watershed runoff model and a corn grain model was developed to determine the reservoir size necessary to ensure the availability of water on a probability basis for irrigation. Return period calculations are made on yields to obtain probability curves of yield as a function of reservoir size for the simulation period. This information enables the user to make better decisions regarding selection and design of irrigation water supply reservoirs.