As the Bobonaza flows  downriver, it grows in strength and size. However, because of deforestation, which increases the amount of sediment in the river, the Bobonaza is much slower and less treacherous today than it was in the 18th century, when Isabel made her voyage. Both Tito and Marlon remember how as little as 15 years ago, the river ran much faster and filled with whirlpools that could be difficult to pass.