Limnology

Study on River Damodar

— by Bishruti Chowdhury, October 21, 2021 —

1. Introduction

The Damodar is one of the most polluted river in the country today, due to the several industries that have developed on its mineral-rich banks. Specialists announce the only strategy to recoup the Damodar valley is for these highly contaminating industries to make huge involvements in clean-up technologies or to change to a new generation of cleaner technologies, but the industrialists influencing the area’s resources are not helpful to make the difference.

• Location

Bardwan, West Bengal, India

• Present status

Industrialisation along the Damodar has provided it a river of slurry. Minerals, mine rejects and harmful effluents are washed into the Damodar and its tributaries. Today both of its water and its sand are invaded by coal dust and waste from the numerous industries that have sprung up in its basin.

• Polluting sources of Damodar River Dihika canal dischargingto river Damodar (Asansol, Burnpur) Tamla canal discharging to river Damodar (Durgapur)Singaranriverdischargingto river Damodar (Andal G.P.) Dhenua Canal discharging into the river Damodar (Asansol) Nunia Canal near Ghagarburi discharging into the river Damodar (Raniganj G.P.) Nupur Nallah at Madanpur discharging into the river Damodar (Asansol)  Nunia Canal at Narayankuri village discharging into the river Damodar (Asansol) DishergharNallah (near Chinnamasta Mandir) discharging into the river Damodar (Asansol, Kulti) 9. Disherghar Nallah (Nadighat) discharging into the river Damodar (Asansol, Kult)Chinakuri (near Power Station) discharging into the river Damodar (Asansol, Kulti)  Chinakuri (near pumping Station) discharging into the river Damodar (Asansol, Kulti)
• Water Quality

• Prevention
• What should we stop?

Ganga contains high coliforms, BOD & suspended solids. So firstly, we should avoid releasing construction waste and the untreated sewage in to lakes. Avoid throwing solid waste, plastic, things made up with metals. Avoid harmful untreated chemicals, hot water and ass released from industries.

• What should do?

Adsorption: It is the process of solid holds molecules of liquid or solute as a thin film.

Chlorination: It is the most widely used disinfectant for the treatment of waste water.

Ion exchange: It is the process of demineralization.

Chemical extraction :Separation of various water solvent.

Membrane separation :Separation of various molecules through membrane, it depends on the pore size and molecular size.

Electrokinetics  :It is a procedure of a low-voltage direct-current electric field is applied across a section of contaminated soil to move contaminants.

Bioleaching: Removes heavy metals.

Phytoremediation: Application of plants to remove wastes from water.

• Reference
  • http://www.rainwaterharvesting.org/crisis/Damodar.htm#:~:text=The%20Damodar%20is%20the%20most,on%20its%20mineral%2Drich%20banks.&text=The%20pollution%20was%20caused%20by,toxic%20metals%20and%20coal%20dust.
  • West Bengal pollution control board
  • Revised action plan for rejuvenation of river Damodar
  • https://www.downtoearth.org.in/coverage/choking-slowly-to-death-30582