Dams are constructed for variety of purposes such as hydroelectric power generation, increase the water supply for irrigation, provide recreational opportunities and flood control etc. Dam construction causes adverse environmental and sociological impacts. However, dam projects are ultimately beneficial to either the environment or surrounding human populations. This paper describes the environmental as well as socio-economic impacts due to construction of a dam. Changes in moisture percentage, temperature and air movements caused by the water bodies differentiate the climatic conditions related to topography. Regional scaled climatic changes can be observed by these effects. Biological life of the river changes fast both in the reservoir and in downstream. The parts of the bio-system that are affected by the dam are the watered parts of the shore.
Dams, environmental impacts, social impacts, Territorial biological system, Aquatic ecosystem
