Download RAW file: https://library.csbe-scgab.ca/docs/journal/41/41_1_13_raw.pdf
Groundwater recharge estimation is important for modelling transport of agricultural pollutants and their consequences on groundwater quality. The objective of this study was to evaluate the model EPIC (ErosionIProductivity Impact Calculator) for its capacity to estimate groundwater recharge. Simulations were done between 1967 and 1990 on the Portneuf River watershed (359 km2 ) which is located south-west from Quebec. EPIC was used on 789 homogeneous zones of the watershed. These homogeneous zones were determined by soil utilization, soil texture, slope, and groundwater depths criteria. Drainage depths reaching the saturated zone, simulated by EPIC, were compared to baseflows at the outlet of the watershed. No calibration of EPIC was necessary to estimate groundwater recharge, except for a parameter that controlled soil water evaporation. For the 24-year study period, the mean difference between measured and simulated drainage was 4.3%. Sand textured areas, where potato fields are located, contributed mainly to groundwater recharge.
A.-M. Laroche, J. Gallichand cl M. Theriault 1999. ESTIMATION REGIONALE DE LA RECHARGE PAR UN MODELE HYDROLOGIQUE PONCTUEL. Canadian Agricultural Engineering 41(1):13-22.
Canadian Society for Bioengineering