List of tidal barrages explained

A tidal barrage is an artificial obstruction at the mouth of a tidal watercourse, in contrast to a normal barrage along a river's inland course.

Purpose

The common primary functions of a barrage are:

• Increase the depth of a river (similar to a weir)
• Maintain a separation between fresh and salt water
• Reduce the risk of tidal flooding up the river

Secondary functions may include:

• Tidal power generation
• Artificial whitewater leisure centres
• Form a Coastal reservoir

Notable barrages

• Cardiff Bay Barrage
• Goolwa Barrages
• Marina Barrage
• Prakasham Barrage
• Swansea barrage
• Tees Barrage
• West Sea Barrage

Power Station Barrages

• Rance tidal power plant
• Annapolis Royal Generating Station (Decommissioned)
• Sihwa Lake Tidal Power Station
• Kislaya Guba Tidal Power Station
• Jiangxia Tidal Power Station

Proposed barrages

• Severn Barrage across the River Severn between Wales and England
• Mersey Barrage across the Mersey Estuary in England

See also

• Dam
• Floodgate
• Thames Barrier
• Weir