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Posts tagged Sandbars

Sandbars along Sinaloa Coastline, Mexico

25.6N 109W

August 8th, 2009 Category: Lakes, Rivers

Mexico - June 22nd, 2009

Mexico - June 22nd, 2009

The coastline of the Mexican state of Sinaloa, along the Gulf of California, is characterized by many long, narrow sandbars and small islands.

The tan stretch of land speckled with green is an area of coastal plains lying between the gulf and the foothills of the Sierra Madre Occidental Range (upper right corner).

Two artificial lakes created by dams can be observed at the top center:  the larger Miguel Hidalgo Reservoir on the Fuerte River, and below it, the smaller Josefa Ortiz de Dominguez Reservoir on the Alamos River.

Bombetoka Bay and Betsiboka River, Madagascar – February 28th, 2009

February 27th, 2009 Category: Image of the day, Rivers

Bombetoka Bay, Madagascar - February 19th, 2009

Bombetoka Bay, Madagascar - February 19th, 2009

Close-up of rivermouth

Close-up of rivermouth

Bombetoka Bay is a bay on the northwestern coast of Madagascar (left) near the city of Mahajanga, where the Betsiboka River flows into the Mozambique Channel.

Numerous islands and sandbars have formed in the estuary from the large amount of sediments carried in by the Betsiboka River, and have been shaped by the flow of the river and the push and pull of tides.

Along coastlines and on the islands, the vegetation is predominantly mangrove forests. In fact, Bombetoka Bay is home to some of Madagascar’s largest remaining communities of mangroves.

Mangoky River, Madagascar – February 22nd, 2009

February 22nd, 2009 Category: Image of the day, Rivers

Southern Madagascar - February 19th, 2009

Southern Madagascar - February 19th, 2009

Several sediment-loaded rivers run from the central highlands of Madagascar to the Mozambique Channel.

The Mangoky River, top left, is 564 kilometers long (350 mi). It flows generally in a westerly direction out of the highlands, crosses the southern extension of the Bemaraha Plateau, reaches the coastal plain and its delta, and enters the Mozambique Channel north of the city of Morombe.

Most of Madagascar has undergone serious deforestation during the last 40 years, which has led to extreme soil erosion in the Mangoky River basin, as evidenced by the many sandbars located within the river channel.

Silt-laden, greenish-tan Lake Ihotry is clearly discernible south of the river. It is a closed saline lake whose area varies seasonally, from 96 km² to 112 km².

Between the lake and the coast is a rather large, whitish area of sand interspersed with silt-laden ponds.

The southern portion of the delta is dominated by successive barrier island and spit formation. In contrast, the northern, protected portion of the delta is dominated by tidal passes and mangrove swamps

Further south, the Onilahy River, in the province of Toliara, flows down from the hills near Betroka to the Mozambique Channel.