Gulf of Bahrain

The Gulf of Bahrain is an inlet of the Persian Gulf on the east coast of Saudi Arabia, separated from the main body of water by the peninsula of Qatar. It surrounds the islands of Bahrain. The King Fahd Causeway crosses the western section of the Gulf of Bahrain, connection Saudi Arabia to Bahrain.

The Gulf of Bahrain is a large bay lying on the west side of the Persian Gulf, between the peninsula of Qatar and Saudi Arabia. Midway between the northerly tip of Qatar and the coast of Saudi Arabia lies Bahrain, a group of six islands and many small islets. The Gulf of Bahrain thus has two openings to the Persian Gulf, the westernmost of which is spanned by a causeway leading to Saudi Arabia. The elongated southern portion of the Gulf of Bahrain forms the Gulf of Salwah. To the southeast of Bahrain Island, and close to the coast of Qatar, lie the Hawar Islands, now part of Bahrain.

The King Fahd Causeway that connects Saudi Arabia to the island of Bahrain was inaugurated on 26 November 1986. It consists of five bridges linked by otherwise solid embankments and the design was chosen to try to minimise the environmental impact. Another causeway is planned (2012) to link Bahrain to Qatar. This one will be solid for about half its length and the other half will be bridge. The presence of the causeway is likely to have a considerable effect on the circulation of water in the Gulf.

The Hawar Islands, just off the coast of Qatar, were listed as a Ramsar site in 1997. they are home to many bird species including Socotra cormorants. On the main island there are small herds of Arabian oryx and sand gazelle.

The Gulf of Bahrain is shallow and the waters have a small thermal capacity. They are subject to wide fluctuations in temperature, with a range of 14 to 35 °C (57 to 95 °F) around the coasts. The water is also rather more saline (10%) than other parts of the Persian Gulf. Around Bahrain there are seagrass meadows, coral reefs, mudflats and mangrove thickets. These areas are important for the biodiversity of the area, providing habitats for invertebrates, juvenile fish, turtles and dugongs.

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