Tillage practices are known to have a large impact on the quantity of runoff and sediment delivered to a water body, hence spatial knowledge of tillage practices is of great value for accurate watershed modeling. However, current methods (i.e. windshield survey or intense field survey) of obtaining field data are either inaccurate or overly time-consuming. Combined radar and infrared remote sensing was gathered to determine the tillage types and illustrate the convenience and utility of remote data collection in watershed management. Data was collected in the Walnut Creek watershed north of Des Moines, Iowa and then combined with data on crops, elevation, and climate to create a field level management database. WEPP was used in conjunction with the management database to model current runoff and sediment delivery in Walnut Creek watershed along with runoff and sediment delivery under conservation and conventional management schemes. The resulting model was analyzed for accuracy of the various components and results and for cost-effectiveness.