Evaluation of positive negative aspects of …

The positive impacts are as follows:

1.provides work
2.eliminates flooding
3.provides power
4.provides water for human consumption
5.helps to conserve water
6.provides water for agriculture
7.provides water for industrial uses
8.provides for a fishery where one may not have existed before
9.changes the ecology of the region
10.opens new areas to agriculture 

Negative impacts may include:

1.they lead to the displacement of human, plants, animals, chiefly from small tribal communities;
2.disrupt downstream fisheries;
3.increase the risk of earthquakes;
4.submerge forest land; increase the spread of insect-borne diseases; and
threaten the fragile regional ecosystem through reducing, the flow of water from the rivers into the seas.
5.These projects initially devastate human lives and biodiversity by inundating thousands of acres of forests and agricultural land.
6.They degrade the fertile agricultural soils due to continuous irrigation (rather the seasonal irrigation which is dependent on the monsoon), and salinization, making the soil toxic to many plant species.