Calibration and Validation of WAVE Model for Simulating Components of Soil Nitrogen Balance

Using models to interpret soil-water-plant relationships under different conditions enable us to study the different management scenarios and then determine the optimum option، which help us to reduce the costs and to improve the benefits. As experimental studies are time consuming and expensive and the results are often affected by uncontrollable environmental conditions، using models to describe the complicated relationships between soil، water، and plant can be a suitable solution. The aim of this study was to use WAVE Model to predict nitrogen balance components and simulation of soil water reserve over a corn crop season in 2007 and also in the period between 2007 harvest and the next crop of 2008. This study was done in the Irstea experimental station in the Southern France in 2007-2008 period. Results showed an appropriate agreement between measured and model simulations of leaf area index (r2=0. 95)، soil water reserve (r2=0. 96)، and final soil nitrogen content (by maximum difference of 0. 6 kg N. ha-1). Also، in calibration process for soil water reserve simulation، according to nRMSE and NSE indices، which were، respectively، 7 % and 0. 95، the performance of the model was excellent.