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Posts tagged De Grey River

Sediment Plume from De Grey River, Australia

20.3S 118.5E

March 17th, 2013 Category: Rivers, Sediments

Australia – March 5th, 2013

The De Grey River is a river located in the Pilbara region of Western Australia. It rises south of Callawa at the confluence of the Oakover and the Nullagine rivers and flows in a west-north-westerly direction eventually discharging into the Indian Ocean via Breaker Inlet about 80 km north-east of Port Hedland.

Its stream bed is 100 to 130 metres wide, dry throughout most of the year. Here, however, due to rainfall associated with Tropical Cyclone Rusty (17S), much water was present in the river, carrying with it great loads of sediment. Here, that sediment can be seen emptying into the Indian Ocean and creating a greenish blue plume that extends far offshore.

Sediments by De Grey River Mouth and Along Eighty Mile Beach, Australia – March 12th, 2013

19.6S 121.0E

March 12th, 2013 Category: Image of the day, Rivers, Sediments

Australia – March 4th, 2013

Heavy rainfall associated with the presence of Tropical Cyclone Rusty (17S), which made landfall in northwestern Australia in late February 2013 caused rivers to flood and release heavy sediment loads into the Indian Ocean. Here, rusty red sediments can be seen spilling from the mouth of the De Grey River and into Breaker Inlet (lower left). A whitish band of sediment can also be seen framing the coastline along Eighty Mile Beach, which forms the coastline where the Great Sandy Desert approaches the Indian Ocean.  The beach lies about halfway between the towns of Broome and Port Hedland, where the cyclone made landfall.

Sediment Plume by De Grey River Mouth, Australia

20.3S 118.5E

March 11th, 2013 Category: Rivers, Sediments

Australia – March 3rd, 2013

When Tropical Cyclone Rusty (17S) made landfall east of Port Hedland, in northwestern Australia, in late February 2013, it brought heavy rains and flood warnings. Higher water was recorded in the De Gray River in early March. Flooded rivers usually carry heavy sediment loads, and in this image, sediments can be seen near the river mouth. A plume of sediments can also be seen extending far offshore in a loop shape, carried by ocean currents.

De Grey River and Chichester Range in Western Australia’s Pilbara Region

21S 118.7E

January 25th, 2011 Category: Mountains, Rivers, Sediments

Australia - January 24th, 2011

The De Grey River is a seasonally intermittent stream that runs through the Pilbara region of Western Australia. Here it can be seen discharging into the Indian Ocean via Breaker Inlet about 80km North East of Port Hedland.

Running parallel to the bottom edge of the image is the Chichester Range, also in the Pilbara region. The range, darker red in color than the surrounding terrain, rises abruptly from the coastal plain and is composed of rolling hills, escarpments, jagged peaks, gorges and winding tree-lined watercourses.

White Sands of Eighty Mile Beach and Red Sediments from De Grey River, Australia

20.3S 119.2E

November 23rd, 2010 Category: Rivers

Australia - November 9th, 2010

The whitish area along the coast of Western Australia is a sandy beach called the Eighty Mile Beach, so named for its length of approximately eighty miles.

To the west of the end of the beach is a reddish headland. Here, the De Grey River releases orange-red sediments into the ocean. The headland is part of Western Australia’s Pilbara (pronounced “Pillbra”) region, a large, dry, thinly populated region in the north of the state known for its vast mineral deposits, in particular iron ore.