Title: Río Negro (Uruguay) Content: The Río Negro (Black River) is the most important river in Uruguay.is a river in central France. It is a left tributary of the Uruguay river. It starts in southern Brazil and flows west across the entire width of Uruguay to the Uruguay River. The course of the Río Negro across Uruguay effectively divides the south of the country from the north. ==Geography== The Río Negro is long. Its drainage basin covers , most of it in territory of Uruguay; only are in Brazil. Its average yearly discharge (volume of water which passes through a section of the river per unit of time) is (70 years) at the Palmar dam, to the east of the city of Mercedes, Soriano department. Colors= id:lightgrey value:gray(0.9) id:darkgrey value:gray(0.7) id:sfondo value:rgb(1,1,1) id:barra value:rgb(0.6,0.7,0.8) ImageSize = width:500 height:300 PlotArea = left:50 bottom:30 top:30 right:30 DateFormat = x.y Period = from:0 till:1200 TimeAxis = orientation:vertical AlignBars = justify ScaleMajor = gridcolor:darkgrey increment:200 start:0 ScaleMinor = gridcolor:lightgrey increment:100 start:0 BackgroundColors = canvas:sfondo BarData= bar:Jan text:Jan. bar:Feb text:Feb. bar:Mar text:Mar. bar:Apr text:Apr. bar:May text:May bar:Jun text:Jun. bar:Jul text:Jul. bar:Aug text:Aug. bar:Sep text:Sep. bar:Oct text:Oct. bar:Nov text:Nov. bar:Dec text:Dec. PlotData= color:barra width:20 align:left bar:Jan from:0 till: 313 bar:Feb from:0 till: 380 bar:Mar from:0 till: 417 bar:Apr from:0 till: 644 bar:May from:0 till: 828 bar:Jun from:0 till: 829 bar:Jul from:0 till: 1117 bar:Aug from:0 till: 1147 bar:Sep from:0 till: 1098 bar:Oct from:0 till: 941 bar:Nov from:0 till: 479 bar:Dec from:0 till: 467 PlotData= bar:Jan at: 313 fontsize:S text: 313 shift:(-9,5) bar:Feb at: 380 fontsize:S text: 380 shift:(-10,5) bar:Mar at: 417 fontsize:S text: 417 shift:(-10,5) bar:Apr at: 644 fontsize:S text: 644 shift:(-10,5) bar:May at: 828 fontsize:S text: 828 shift:(-10,5) bar:Jun at: 829 fontsize:S text: 829 shift:(-10,5) bar:Jul at: 1117 fontsize:S text: 1,117 shift:(-12,5) bar:Aug at: 1147 fontsize:S text: 1,147 shift:(-12,5) bar:Sep at: 1098 fontsize:S text: 1,098 shift:(-12,5) bar:Oct at: 941 fontsize:S text: 941 shift:(-10,5) bar:Nov at: 479 fontsize:S text: 479 shift:(-10,5) bar:Dec at: 467 fontsize:S text: 467 shift:(-10,5) Average monthly discharge (m3/s) at Palmar ===Course=== The Río Negro starts in the Bagé municipality, Rio Grande do Sul state, Brazil. It flows from northeast to southwest through Uruguay and divides the country in two parts: the northern part with 6 departments and the southern part (slightly larger) with the 13 remaining departments. Its course forms the border of the departments: * On its northern (right) side: Rivera, Tacuarembó and Río Negro. * On its southern (left) side: Cerro Largo, Durazno, Flores and Soriano. At its end, to the south of the city of Fray Bentos in the Río Negro department, the Río Negro flows into the Uruguay river as a left tributary. The river has many meanders along its course and three hydroelectric dams has been built on this river that form three artificial lakes (or reservoirs in this case), from northeast to southwest: # Rincón del Bonete Reservoir, also called the Gabriel Terra Reservoir or the Río Negro Reservoir; # Baygorria Dam; and the # Palmar or Constitution Dam. The main cities along the river: * Tacuarembó department ** Paso de los Toros. ** San Gregorio de Polanco. * Soriano department ** Mercedes, capital of the department. ** Villa Soriano, one of the oldest towns of Uruguay; it is near the mouth of the Río Negro river. ==Main tributaries== The main tributaries of the Río Negro are: Left tributaries: * Yí - 210 km. Right tributaries: * Tacuarembó - 260 km. ==Gallery== File:MercedesInundado.JPG|Flooding of the Mercedes city. File:Flooding along the Rio Negro, Uruguay.jpg|Flooding along the Rio Negro. File:RioYi Durazno Uruguay.jpg|The Yí river. File:Río Tacuarembó.JPG|Tacuarembó river. ==Related pages== * List of rivers of France