Longitudinal barriers cut across the river channel and interrupt the flow of water, sediment and fish along the river. Some hold water back and create a pond upstream (ponding); others don't (non-ponding).
Tap a barrier to see a photo, a diagram and how to spot it.
Lateral barriers run along the river's edge and separate the channel from its banks and floodplain. Some protect the bank from erosion (bank stabilisation); others keep flood water in (flood control).
Tap a barrier to see a photo, a diagram and how to spot it.