In what ways do dam construction alter the ecological balance? Elaborate with appropriate examples.

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Dam construction has long been considered a significant step in the development of infrastructure, water storage, irrigation, and hydroelectric power generation. However, it also has far-reaching ecological consequences, which have often been a central concern of non-violent environmental movements that arose in post-Gandhian India. The construction of large dams disrupts natural ecosystems, alters the course of rivers, and affects both biodiversity and human populations dependent on these ecological systems. Movements like the Narmada Bachao Andolan (NBA) and other post-Gandhian, non-violent environmental struggles have highlighted the environmental and social impacts of such projects. Understanding the ways in which dam construction alters ecological balance requires analyzing its impact on rivers, forests, soil, aquatic life, and local communities, as well as examining concrete examples of these effects. Dams fundamentally change the natural flow of rivers, which is one of the primary ways they disturb the ecological balance. Rivers have a natural course of flow that sustains riparian ecosystems and supports seasonal flooding patterns. Seasonal floods deposit fertile silt on the floodplains, rejuvenating agricultural land and maintaining wetland ecosystems. When a dam is constructed, this flow is disrupted because water is stored in a reservoir and released in a controlled manner. The sediment that once flowed downstream and nourished the soil is trapped in the reservoir, leading to siltation and reduced fertility in the downstream plains. This disruption can also affect the migration patterns of fish and other aquatic species. For example, the construction of the Sardar Sarovar Dam on the Narmada River has caused significant changes to the river’s natural flow, which has impacted downstream agriculture and fisheries. Another major ecological effect of dam construction is the submergence of vast areas of forests and agricultural land to create reservoirs. Forests are not just a source of biodiversity but _____ ______ _________ __________ _______ _______ _______.
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Degree : MASTER DEGREE PROGRAMMES
Course Name : MA in Gandhi and Peace Studies
Course Code : MGPS
Subject Name : Non-violent Movements after Gandhi
Subject Code : MGPE 7
Year : 2024 2025