Scour channel lakes are generally small and crescent-shaped. Most of these aquatic areas are isolated. Boundaries are the apparent shorelines. Where contiguous, the connecting boundary is a line across the downstream limit of the apparent shorelines. Most of these lakes are larger than 100 ha.
Boundaries are the apparent shorelines.
Where contiguous, the connecting boundary is a line across the limits of the apparent shorelines. Borrow pits are water bodies formed where material was excavated for levee or dike construction. The boundaries are the apparent shorelines or the limits of excavation. Most borrow pits are parallel and immediately adjacent to dikes or levees. The boundaries of artificial lakes are the apparent shorelines, and where contiguous, the connecting boundary is a line across the limits of the apparent shorelines.