public public icon 1. Combining Field Data and Modeling to Improve Groundwater Recharge Estimates at the Watershed Scale in Ontario, 1954 to 2001 [Canada]: The First Step (2 of 2) 1954. Parkin, Gary. A set of computer generated soil hydrology data. The computer simulations were performed for twelve regions of Ontario, on three different soil typ... Scholars Portal Dataverse.