Editing Sediment delivery ratio (section)

== Boundary Conditions ==
Boundary inclusions for the sediment delivery ratio encompass all sediment eroded from hillslopes or defined source areas that reaches the specified downstream receiving system, such as a river outlet or reservoir inflow point. This includes sediment transported by surface runoff, shallow subsurface flow, or channelized flow paths within the catchment. Boundary exclusions typically involve sediment that is redeposited or retained within the source area or intermediate storage zones such as floodplains, terraces, or colluvial deposits before reaching the downstream measurement point. Sediment contributions from outside the defined source area or from anthropogenic inputs downstream of the source are also excluded.