![]() In Hindu belief the site is held to be a triple confluence ( Triveni Sangam), the third river being the metaphysical (not physically present) Sarasvati. In Hinduism, this is a pilgrimage site for ritual bathing during a Kumbh Mela event tens of millions of people visit the site. Near Allahabad, India, the Yamuna flows into the Ganges.At Devprayag in India, the Ganges River originates at the confluence of the Bhagirathi and the Alaknanda see images above.82 km north of Basra in Iraq at the town of Al-Qurnah is the confluence of the rivers Tigris and Euphrates, forming the Shatt al-Arab. ![]() The Yangtze flows left to right across the bottom of the image. The confluence of the Jialing and the Yangtze in Chongqing. In Pittsburgh, a number of adherents to Mayanism consider their city's confluence to be sacred. In Hinduism, the confluence of two sacred rivers often is a pilgrimage site for ritual bathing. Pre-Christian Slavic peoples chose confluences as the sites for fortified triangular temples, where they practiced human sacrifice and other sacred rites. Rogers suggests that for the ancient peoples of the Iron Age in northwest Europe, watery locations were often sacred, especially sources and confluences. One other way that confluences may be exploited by humans is as sacred places in religions. Often a confluence lies in the shared floodplain of the two rivers and nothing is built on it, for example at Manaus, described below. In other cases, a confluence is an industrial site, as in Philadelphia or Mannheim. Cities also often build parks at confluences, sometimes as projects of municipal improvement, as at Portland and Pittsburgh. Within a city, a confluence often forms a visually prominent point, so that confluences are sometimes chosen as the site of prominent public buildings or monuments, as in Koblenz, Lyon, and Winnipeg. Louis, and Khartoum, arose at confluences further examples appear in the list. Various examples are found in the list below.Ī number of major cities, such as Chongqing, St. Since rivers often serve as political boundaries, confluences sometimes demarcate three abutting political entities, such as nations, states, or provinces, forming a tripoint. The fountain at Point State Park in Pittsburgh, at the apex of the confluence of the Allegheny (top) and the Monongahela According to Lynch, "the color of each river is determined by many things: type and amount of vegetation in the watershed, geological properties, dissolved chemicals, sediments and biologic content – usually algae." Lynch also notes that color differences can persist for miles downstream before they finally blend completely. The United States Geological Survey gives an example: "chemical changes occur when a stream contaminated with acid mine drainage combines with a stream with near-neutral pH water these reactions happen very rapidly and influence the subsequent transport of metals downstream of the mixing zone." Ī natural phenomenon at confluences that is obvious even to casual observers is a difference in color between the two streams see images in this article for several examples. Confluences are relevant to the distribution of living organisms (i.e., ecology) as well "the general pattern of increasing stream flow and decreasing slopes drives a corresponding shift in habitat characteristics." Īnother science relevant to the study of confluences is chemistry, because sometimes the mixing of the waters of two streams triggers a chemical reaction, particularly in a polluted stream. The water flows and their consequences are often studied with mathematical models. Hydrology studies the characteristic flow patterns of confluences and how they give rise to patterns of erosion, bars, and scour pools. ![]() A confluence can occur in several configurations: at the point where a tributary joins a larger river ( main stem) or where two streams meet to become the source of a river of a new name (such as the confluence of the Monongahela and Allegheny rivers at Pittsburgh, forming the Ohio) or where two separated channels of a river (forming a river island) rejoin at the downstream end.Ĭonfluences are studied in a variety of sciences. In geography, a confluence (also: conflux) occurs where two or more flowing bodies of water join to form a single channel. ![]() The same confluence viewed from upstream at a different time note the swirl of sediment from the Alaknanda. ![]()
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