The river environment is characterized by swamps (the so-called "lame"), meanders, stretches of water, woodlands, gravelly and sandy areas. A nature sanctuary clashing with the surrounding landscape dominated by rice monoculture. The morphological aspect of the area is deeply affected by the presence of the river Sesia, a torrential river characterized by different flows according to low water periods and periods of flood, giving the area an ever-changing and varied aspect.