The Rabindra Sarobar lake ecosystem is playing a key role in maintaining the oxygen balance of the Kolkata metropolis by generating fresh oxygen. The Physical environment is considered as an esential part of a lacustrine system. Degradation of environment largely afects the physical component. If the physical components are spoiled, then the entire system of the lake wil get degraded. Water, air, soil, sound level etc. have ben taken as the physical components of the study.