Effects of recession criteria on prediction of recession times in border irrigation models

The recession criterion used in border irrigation models is one of the factors which affects the accuracy of prediction of the recession times. Three models, viz. the Walker model, Jaynes model and Ross model were selected to examine effect of recession criteria on the prediction of recession times. Three criteria were considered for each of these models and were applied to five irrigation events monitored in south-east Australia. The prediction accuracy of the models using these criteria for recession times was evaluated by computing the prediction error E_p. The prediction of the models for a given recession criterion varied considerably with the events and indicated that other factors affecting flows in border irrigation should also be taken into account while selecting a recession criterion.