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(Port. dō`ro͝o) or


(Span. do͞oā`rō), river, c.475 mi (765 km) long, rising in the Sierra de Urbión, N central Spain. It flows W across N Spain, then southwest to form part of the Spanish-Portuguese border before flowing W across N Portugal to the Atlantic Ocean at Pôrto. One of the longest rivers of the Iberian Peninsula, it drains most of the northern portion of the central plateau; the Tormes, Esla, and Pisuerga rivers are its chief tributaries. Silting, rapids, and deep gorges combine to make the Douro unnavigable. The middle Douro is extensively used for irrigation. Several hydroelectric power plants are along the river, and through an international agreement the power is used for irrigation and development. Grapes are the chief crop of the Douro valley, and the Douro estuary is the center of Portuguese wine trade.
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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



(Duero), a river on the Iberian peninsula, with a length of 925 km (or, according to other sources, 938 km). The area of the river basin is 95,000 sq km.

The river originates in the Iberian Mountains in Spain, and in its upper and middle reaches flows through a deep valley and crosses the Old Castillian Plateau. Descending from the plateau, the Douro flows 110 km through one of Europe’s most splendid canyons, which is 200-500 m deep. The width of the river bed ranges from 30 to 40 m. Lower, in Portuguese territory, the Douro flows at first through a wide valley in mountainous and hilly areas, then through maritime lowlands, and finally into the Atlantic Ocean. The mouth of the Douro is an estuary, shallowed by a sandbar. Its main tributaries are the Pisuerga, Adaja, Esla, Tormes, and Támega. In winter and spring there are frequent violent floods, with water in the canyon rising up to 15-20 m, and flooding in the plains. The average flow of water at its mouth is approximately 700 cu m per sec, with a maximum of over 15,000 cu m per sec. The Douro is navigable for 200 km above its mouth. There is a reservoir and hydroelectric power station. The most important granaries of Spain are in the valleys of the Douro and Pisuerga. The Spanish cities Soria and Aranda de Duero and the Portuguese cities Pezo da Regua and Porto are situated on the Douro.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
"La Rosa was one of the first to start making wines in the Douro in 1990/91.".
"A trip on the boat is the most relaxing way to enjoy Porto," says Patricia Carvalho, sales manager at Feel Douro, a yacht and cruise charter that caters to nautical tourism in the area.
dh Here we drank in not only the fine wine itself but the sight of the vast, rolling vineyards and the stunning views across r the Douro River.
"The allure of Porto, with its rich historic and cultural attractions, world-famous Port wine production and location on the Douro River, has seen the city enjoy an increase in visitor numbers.
Our 24/7 entertainment came courtesy of the river bank as we sailed along the Douro, admiring the pretty villages, marinas and vineyards on the steep shoreline.
The Amalia has been built just wide enough to squeeze into the Douro's locks and observing the captain steering her in with just a foot to spare each side was like watching an artist at work.
Whereas four brands including Pure Water, 3 Star, Douro and Real Plus were found unsafe due to the presence of higher levels of Sodium ranging from 60-115 ppm.
Four brands Pure Water, 3 Star, Douro and Real Plus were unsafe due to higher sodium levels ranging from 60 to 115 parts per million (ppm), and Pure It was unsafe due to higher levels of fluoride 1.8ppm.
NEW SOLO CRUISES: THE DOURO, PORTO AND SALAMANCA RIVER CRUISE FOR SOLO TRAVELLERS FROM PS1,699PP Riviera Travel's eight-day fullboard The Douro, Porto and Salamanca River Cruise for Solo Travellers starts from PS1,699 per person departing March 31, 2019 aboard the MS Douro Splendour.
I then took a cable car ride from the Douro waterside up to the famous double-decker Dom Luis I bridge, with picture-perfect views of Porto's Ribeira ([euro]6).
Team Abu Dhabi's Rashed Al Qemzi finished fourth in the Grand Prix of Portugal to seal the title on Sunday on the Douro river.