Which filtering practice exception allows for more flow than sheet flow?

The option indicating "None of the above" is the correct choice because none of the practices listed allow for more flow than what is typically managed by sheet flow.

Sheet flow refers to the process of water flowing over the surface of the ground in a thin layer, often seen in natural settings and designed erosion control practices that aim to mimic this gentle movement of water. Filtering practices, such as those listed, generally focus on slowing down and filtering water rather than increasing flow capacity.

For instance, temporary gabion outlet structures are used to stabilize water flows and prevent erosion, but their design is focused on managing specific runoff conditions rather than allowing greater flow than a normal sheet flow scenario. Similarly, a super silt fence is intended for sediment control, capturing particulates from water rather than facilitating higher flow rates. Lastly, silt fence on pavement is employed to intercept and filter sediment-laden runoff, but again, it does not enable more flow than sheet flow.

Thus, when considering the characteristics of these filtering practices, it becomes apparent that they do not fulfill the criteria of allowing more flow than sheet flow, validating "None of the above" as the correct option.