<P> It has a number of tributaries and subtributaries, such as Barakar, Konar, Bokaro, Haharo, Jamunia, Ghari, Guaia, Khadia and Bhera . The Damodar and the Barakar trifurcates the Chota Nagpur plateau . The rivers pass through hilly areas with great force, sweeping away whatever lies in their path . Two bridges on the Grand Trunk Road near Barhi in Hazaribagh district were torn down by the Barakar: the great stone bridge in 1913 and the subsequent iron bridge in 1946 . </P> <P> The Chota Nagpur Plateau receives an average annual rainfall of around 1,400 mm (55 in), almost all of it in the monsoon months between June and August . The huge volume of water that flows down the Damodar and its tributaries during the monsoons used to be a fury in the upper reaches of the valley . In the lower valley it used to overflow its banks and flood large areas . </P> <P> Damodar River was earlier known as the "River of Sorrows" as it used to flood many areas of Bardhaman, Hooghly, Howrah and Medinipur districts . Even now the floods sometimes affect the lower Damodar Valley, but the havoc it wreaked in earlier years is now a matter of history . </P> <P> The floods were virtually an annual ritual . In some years the damage was probably more . Many of the great floods of the Damodar are recorded in history--1770, 1855, 1866, 1873--74, 1875--76, 1884--85, 1891--92, 1897, 1900, 1907, 1913, 1927, 1930, 1935 and 1943 . In four of these floods (1770, 1855, 1913 and 1943) most of Bardhaman town was flooded . </P>

Which river is known as biological desert in india