The Rupnarayan River flows for 240 km under various names, starting from the foothills of the Chhota Nagpur Plateau northeast of Purulia as the Dhaleswari River, continuing into Bankura as the Dwarakeshwar river and finally flowing as the Rupnarayan near Ghatal where it is joined by the Shilabati river. The Rupnarayan River finally drains into the Hoogli river.
Significance of the River
The Rupnarayan river is an important source of fishing in West Bengal and is one of the major sources of the famous Hilsa fish which is used as a delicacy in Bengali cuisine. The West Bengal Power Development Corporation also hosts a thermal power plant on the banks of this river in Kolaghat. Most of the people inhabiting this river basin depend on agriculture for their source of livelihood. At the confluence of the Rupnarayan River with the Hoogly River, several industries like chemical and oil factories are located on the banks of this river.
Geography, Habitat and Ecosystem:
The Rupnarayan River flows through primarily three types of topography the Purulia High Plains in its upper reaches, the Rarh Upland in its middle reaches and finally the riverine deltaic region in its lower course. The Rupnarayan River basin usually receives regular and heavy rainfall over a large section of its course with the exception of the Dwarakeshwar River which receives scanty rainfall even during the monsoons. The Rupnarayan River flows through large areas of densely populated lands and agricultural fields with very little surviving native vegetation.
Sources:
http://www.britannica.com/place/Rupnarayan-River
https://en.wikipedia.org/wiki/Rupnarayan_River
https://books.google.ca/books?id=vFp8FjOaT8QC&pg=PA476&lpg=PA476&dq=rupnarayan+river&source=bl&ots=3j7xkBsGpa&sig=82_AdRGzhuBh0uSupK2VCN4xkPI&hl=en&sa=X&ved=0ahUKEwieyJff_rzMAhVIlh4KHa0fDKY4ChDoAQgrMAM#v=onepage&q=rupnarayan%20river&f=false
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