🌊Weirs enable control of water levels in rivers, providing various benefits.
⚙️The flow over a weir depends on factors such as weir length, water level, and geometry.
💡Passive weirs have fixed rating curves, while controlled outlets offer flexibility.
📐Non-linear weirs, like labyrinth weirs, allow for increased discharge within a fixed footprint.
🌍Weirs have environmental impacts but remain important for water flow control.
What is a weir?
—A weir is a small dam built across a river to control water levels.
How do weirs work?
—Weirs increase water levels upstream through a hydraulic control structure.
What factors affect the flow over a weir?
—Weir length, water level, and geometry are factors that affect the flow over a weir.
What are the benefits of weirs?
—Weirs provide benefits such as powering mills, enabling navigation, and mitigating floods.
What are the environmental impacts of weirs?
—Weirs have environmental impacts, including affecting the aquatic environment and posing dangers to swimmers and boaters.
00:00Weirs are beneficial for controlling water levels in rivers
01:30Factors like weir length and water level affect the flow over a weir
04:37Controlled outlets offer flexibility in water release
05:02Non-linear weirs, like labyrinth weirs, increase discharge within a fixed footprint
06:46Weirs have environmental impacts but remain important for water flow control
