Complex sentence: Its main tributaries are the Riera de Gualba, Riera de Arbúcies, Riera de Santa Coloma and the Riera de Valmanya and it runs through the Parc Natural del Montseny and the Parc Natural del Montnegre i el Corredor.
Split into simpler sentences: Its main tributaries are the Riera de Gualba, Riera de Arbúcies, Riera de Santa Coloma and the Riera de Valmanya. The river runs through the protected areas of the Parc Natural del Montseny and the Parc Natural del Montnegre i el Corredor.