Weir (Water Overlay)
Weirs are effectively small dams in the water, and allow water to flow from a water body with a higher water level to a lower water level. Any water exceeding the height of the weir can flow over it, increasing the throughput as the water level increases. Strictly, water can flow over the weir in either direction.
A weir is a line-based construction.
|WEIR_HEIGHT||m + datum||The height of the weir.||n/a|
|WEIR_WIDTH||m||The width of the weir.||5|
|WEIR_COEFFICIENT||coefficient||The flow coefficient related to the shape of the weir.||1,1|