[American Society of Agricultural and Biological Engineers 21st Century Watershed Technology: Improving Water Quality and Environment Conference Proceedings, 21-24 February 2010, Universidad EARTH, Costa Rica - ()] 21st Century Watershed Technology: Improving Water Quality and Environment Conference Proceedings, 21-24 February 2010, Universidad EARTH, Costa Rica - Classification Of Water Resources In River Basins With Lack Of Data: A Case Study In Southern Brazil