Cais Palafítico da Carrasqueira

photo by Rui Roque3 169

Cais Palafítico da Carrasqueira  — Fotopedia
Palafitic Harbour of Carrasqueira, Sado River, Feb.2007
Wikipedia Article
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Sado River

The Sado River (Portuguese pronunciation: [ˈsaðu]) is a river in Southern Portugal; it is one of the major rivers in the country. It flows in a northerly direction (the only major Portuguese river to do so) through 175 km from its springs in the hills of Caldeirão before entering the Atlantic Ocean in an estuary in the city of Setúbal.

The estuary is the habitat of a large community of bottlenose dolphins; there are 31 members of the pod, each of whom has been named (2007).

The river is dammed in several places, chiefly for irrigation of rice, maize, and other vegetables.

In its course, the river crosses the city of Alcácer do Sal.

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Comporta is a civil parish and village in the municipality of Alcácer, in the old district of Setúbal, in continental Portugal, located at the base of Tróia Peninsula, along the Sado estuary. Information from the 2001 Census, identified a population of 1348 almost equally divided by gender (715 men, 633 women).

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Dock (maritime)

A dock (from Dutch dok) is a human-made structure or group of structures involved in the handling of boats or ships, usually on or close to a shore.

However, the exact meaning varies among different variants of the English language. "Dock" may also refer to a dockyard or shipyard where the loading, unloading, building, or repairing of ships occurs.

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Reflection (physics)

Reflection is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated. Common examples include the reflection of light, sound and water waves. The law of reflection says that for specular reflection the angle at which the wave is incident on the surface equals the angle at which it is reflected. Mirrors exhibit specular reflection.

In acoustics, reflection causes echoes and is used in sonar. In geology, it is important in the study of seismic waves. Reflection is observed with surface waves in bodies of water. Reflection is observed with many types of electromagnetic wave, besides visible light. Reflection of VHF and higher frequencies is important for radio transmission and for radar. Even hard X-rays and gamma rays can be reflected at shallow angles with special "grazing" mirrors.

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List of rivers of Portugal

This is a list of the rivers of Portugal. There are only rivers in Continental Portugal, and none in the islands of Madeira and the Azores.

Note: List was taken from pt:Anexo:Lista de rios de Portugal. Rio X was converted to X River.