Riverine flooding occurs when rivers and streams exceed the capacity of their channels to convey flows, resulting in water overtopping the banks and flowing into adjacent areas. In urban areas, this typically occurs where there has been an increase in upstream impervious cover that is not adequately mitigated by stormwater management practices. | Riverine flooding occurs when rivers and streams exceed the capacity of their channels to convey flows, resulting in water overtopping the banks and flowing into adjacent areas. In urban areas, this typically occurs where there has been an increase in upstream impervious cover that is not adequately mitigated by stormwater management practices. |