<P> Gathering of erosion products near the concave bank and transporting them to the convex bank is the work of the secondary flow across the floor of the river in the vicinity of a river bend . The process of deposition of silt, sand and gravel on the convex bank is clearly illustrated in point bars . </P> <P> River flood plains that contain rivers with a highly sinuous platform are populated by longer oxbow lakes than those with low sinuosity . This is because rivers with high sinuosity have larger meanders, and greater opportunity for longer lakes to form . Rivers with lower sinuosity are characterized by fewer cutoffs and shorter oxbow lakes due to the shorter distance of their meanders . </P> <P> The effect of the secondary flow can be demonstrated using a circular bowl . Partly fill the bowl with water and sprinkle dense particles such as sand or rice into the bowl . Set the water into circular motion with one hand or a spoon . The dense particles quickly sweep into a neat pile in the center of the bowl . This is the mechanism that leads to the formation of point bars and contributes to the formation of oxbow lakes . The primary flow of water in the bowl is circular and the streamlines are concentric with the side of the bowl . However, the secondary flow of the boundary layer across the floor of the bowl is inward toward the center . The primary flow might be expected to fling the dense particles to the perimeter of the bowl, but instead the secondary flow sweeps the particles toward the center . </P> <P> The curved path of a river around a bend makes the water's surface slightly higher on the outside of the bend than on the inside . As a result, at any elevation within the river, water pressure is slightly greater near the outside of the bend than on the inside . A pressure gradient toward the convex bank provides the centripetal force necessary for each parcel of water to follow its curved path . </P>

Which is oxbow type of lake in j and k