*3.3. Complementary Data*

In addition to the information mentioned above, we used hydrographic networks of the study area, highway networks, environmental conservation plan in and surrounding area of the dam, the Rio Canoas State Park managemen<sup>t</sup> plan and information on the agricultural calendar of the main crops cultivated in the state of Santa Catarina, which is provided by the Socioeconomy and Agricultural Planning Center of the State of Santa Catarina (*Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina*–EPAGRI).

#### *3.4. Image Processing System*

We used SPRING (*Sistema de Processamento de Informaç<sup>õ</sup>es Georreferenciadas*), an open software package, for processing the images and structuring the databank. We also used ArcGis 10.2 for generating thematic maps and the Microsoft Office Excel 2007 for organizing the graphs and tables, and GarminTM GPS (Global Positioning System) to collect the field data.
