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Evaluation of the WAVE Model for Predicting Nitrate Leaching for Two Contrasted Soil and Climate Conditions

^a Laboratoire d'étude des Transferts en Hydrologie et Environnement (LTHE) (CNRS, INPG, IRD, UJF), BP 53 X, 38041 Grenoble, France
^b HortResearch, PB 11-030, Palmerston North, New Zealand
^c IRD/Embrapa Cerrados, CP 7091, 71619-970 Brasilia- DF, Brazil

View larger version (21K): [in a new window]   Fig. 1. Evolution in time (days after sowing, DAS) of LAI, Kc, and rooting depth at both sites.

View larger version (55K): [in a new window]   Fig. 2. Components of the soil water balance at (a) Maré and (b) La Côte Saint-André: measurements on bare soil with fertilizer () and on corn plots (•); simulation on bare soil (thin line) and on corn plots (thicker line). DAS is days after sowing.

View larger version (13K): [in a new window]   Fig. 3. Sensitivity of cumulative drainage (y-axis) toward parameters defining interception and root extraction of water by corn (x-axis), in 1996 for Maré.

View larger version (45K): [in a new window]   Fig. 4. Components of the soil NO3–N balance at (a) Maré and (b) La Côte Saint-André: measurements on bare soil with fertilizer () and on corn plots (•); simulation on bare soil (thin line) and on corn plots (thicker line). DAS is days after sowing. Error bars are estimates of standard deviations between six replicates of soil NO3–N concentration. Arrows indicate the time of fertilizer inputs.

View larger version (14K): [in a new window]   Fig. 5. Sensitivity of cumulative NO3 leaching (y-axis) toward organic matter transformation parameters (x-axis), in 1996 for Maré.