The main purpose of Reno mattresses for riverbed protection is to guide river water. Rivers usually flow along their inherent river channels, and there may be naturally formed curved channels in the river course. If a flood occurs, with a huge volume and rapid current, the water flow will tend to flow straight under inertia, which will violently impact the original river channel and embankment, and may cause the river to change course, which would lead to a huge disaster. To reduce the erosion of the river embankment by the rapid current, gabion cages or gabion pads are laid on the inner side of the river embankment or the edge of the riverbed. The surging river water directly impacts the gabion cages or gabion pads, thus protecting the river embankment or riverbed. At the meandering sections of a river, when encountering gabion cages or gabion pads, the river will bend and flow along the inherent course of the river. This guides the river water to flow safely. Gabion mesh is also applied to flood discharge DAMS and diversion DAMS, playing a role in guiding or restraining floods.