Damodar River rises from the Chota Nagpur plateau of the Jharkhand state of India. The river originates near Chandwa village of Palamu district and flows eastward about 592 kilimeters through the state of West Bengal to join the Hoogli River, southward of Kolkata. The river has a number of tributaries. The Chota Nagpur Plateau (also Chhota Nagpur) is a plateau in eastern India, which covers much of Jharkhand state as well as adjacent parts of Orissa, Bihar, and Chhattisgarh. ... Jharkhand (झारखंड in [[Devanagari}}) is a state of India. ... The Republic of India is the second most populous country in the world, with a population of more than one billion, and is the seventh largest country by geographical area. ... West Bengal (পশ্চিম বঙ্গ, Pôščim Bôngô) is a state in the northeast of India. ... The Hoogli River is a distributary of the Ganges River in India. ... This article is on Calcutta/Kolkata, the city. ...

Valley of Damodar River includes India’s large reserves of coal and mica, and the area is highly developed industrial belt of India. The dams on the Damodar River have several hydroelectric power plants. Of late, the Damodar has become one of the most polluted rivers of India, polluted with chemical, and other pollutants like minerals, mine rejects, and toxic effluents, and the river banks are infested by coal dust and wastes from several big and small industries which are located in its basin. Coal Coal is a fossil fuel extracted from the ground either by underground mining, open-pit mining or strip mining. ... rock with mica Mica sheet mica flakes The mica group of minerals includes several closely related materials having highly perfect basal cleavage. ... Scrivener Dam, Canberra Australia, was engineered to withstand a once-in-5000-years flood event A dam (a common Teutonic word, compare to Dutch dam, Swedish and German damm, and the Gothic verb faurdammjan, to block up) is a barrier across flowing water that obstructs, directs or retards the flow... Hydroelectric dam diagram The waters of Llyn Stwlan, the upper reservoir of the Ffestiniog Pumped-Storage Scheme in north Wales, can just be glimpsed on the right. ... The Lachine Canal, in Montreal, is badly polluted Pollution is the release of harmful environmental contaminants, or the substances so released. ... A chemical substance is any material substance used in or obtained by a process in chemistry: A chemical compound is a substance consisting of two or more chemical elements that are chemically combined in fixed proportions. ... Pollutants are substances which directly or indirectly damage us or the environment. ... For a list of biologically injurious substances, including toxins and other materials, as well as their effects, see poison. ... For the term related to television programmes, see watershed (television). ...