Year 11 | 10 December 2019 | email@example.com
Dams are used to manage water resources for irrigation, hydroelectric projects and water supply to the population. The ambitious goal is now to build bigger dams, particularly the high-end technology. With the increasing demand for water, the most mountainous regions are now faced with the proposals on the horizon for the construction of large dams in several states. Unfortunately, the planning and execution of these large dams are not within the base.
The dam projects promise many things: drinking water, flood control, soil fertility increased, in addition to providing jobs to local people. Large dams have come to define the prestige and national honor, to provide the parameters for the development and reducing poverty and hunger. The promises seem to be more profitable for farmers, because they are the producers of wheat in the country. So planners think that it is a step towards food security. India has also undertaken the construction of large dams, especially in response to questions that threatens food security in the vast masses.Hirakud, Damodar, Bhakra Nangal, Tungabhadra and Tehri are some large dams in India. Large dams have a negative impact on the territory, population and environmental resources. There is a massive loss of agricultural land, the prevalence of salt-encrusted areas, displacement of people from their natural habitat areas, severe damage to the earth from earthquakes, floods and soil erosion, floods.
Large dams have important ecological consequences are more damaging than you might imagine. Have negative effects on the hills and mountain ecosystems due to deforestation, there is an increased level of imbalance in temperature causes more warming.
The move adds to people's problems as the use of vast natural resources returnees rebuild their lives elsewhere, will put enormous pressure on the limited resources available. The costs of resettlement and rehabilitation are high, often leaving many farmers without a penny, due to the apathy of the state.
In India, the construction of two large dams in the district of Tehri Garhwal region of the Narmada and sparked mass protests from both the environmental and socio-economic development. The dams are opposed on grounds of massive exploitation of natural resources in the basin of the river, and also because of the threat of collapse of large tracts of forest and farmland. The region is geologically seismic zone, prone to earthquakes that can cause damage to the structure of the dam. About 150,000 hectares of forest land is at risk of immersion and the total area of forest land that would be affected by the floods is likely to 350,000 hectares, about 11% of forests in the river basin.
The Tehri dam project is also facing the same fate with floods and earthquake threats looming on the areas. The area of the dam located between the rivers Bhagirathi and Bhilangana near the town of Tehri is an earthquake zone. The area has already seen major earthquakes, measuring up to 7 points on the Richter scale. The rivers of the region remain low gradient of the path and metamorphic formations occur in their foundations.
Rocks outside are not only fragile but also very fragmented. In the case of a natural disaster unfavorable change shape and yield to the pressure of a disaster. According to an estimate of the INTACH, if such an eventuality, the dam could submerge Tehri town and 23 villages in its suburbs, 72 other villages were partially submerged and about 5,200 hectares, 1,600 hectares of agricultural land is miss the tank.
Finally, about 85,600 people will be displaced by the dam. This estimate is rather old and any new estimates put the total over three times the estimate of losses in Global Economy. The construction of dams to facilitate the construction of roads, road widening, and movement of heavy traffic, people and things like that. improving infrastructure, also leads to the achievement of these tourist areas, the increase in construction activity and movement of people, outside of encouraging the use of substances and other biodegradable plastics.
With a negative aspect to make room for others to say prey to drinking water supply is lost and replaced with the commercialization of water resources and lead to monopolization of water resources, increased participation of national and perhaps leading to a multi-use irrational use of natural resources, particularly water resources.
The main argument is the displacement of large numbers of affected areas have been left homeless. Alongwith the foreseeable loss of life, there would be no irreversible damage to the environment if left unchecked, could devastate humanity in the long term.
by S. C.
20 march 2011, Food & Fun > Nature