Positive impacts of multipurpose river valley projects include electrical generation, flood control and irrigation water for farms, and negative impacts include loss of forests and orchards and fish habitats, and the growth of unhealthy bacteria and unwanted flora. These projects typically involve the building of large dams.
Multipurpose river valley projects help to encourage new types of architecture, provides work for people in the area and they can help to provide water to those living in the area. However, these projects increase the risk of insect-borne diseases, they can increase earthquake risk and threaten any ecosystems in the area that are fragile.
