In the segment (13 minutes) entitled African Dams Dry Up Wetlands & Local Jobs, Pearce explains the causes and consequences of wetland losses in several parts of Africa. His emphasis is on the lost of riparian wetlands lost as annual floods are eliminated by the construction of dams. The conversation illustrates how environmental problems interact with economic security, migration, and even national security. He links the loss of wetlands to decisions about migration on the part of people who would have much preferred to stay home.
|Manantali Dam, Senegal River Basin|
The very first project initiated by the World Bank was the Aswan High Dam in Egypt, which created electricity and extended growing seasons, but disrupted the floods that had supported Egyptian civilizations for thousands of years and made farmers there dependent on chemical fertilizers. It would be the first of many dams that came to symbolize the arrogance of Rostovian development theory (simply build infrastructure and everything will improve).
Dams featured prominently in the very first book I read as a geography student, and small dams were essential parts of my master's thesis, Source-area erosion rates in areas tributary to Miami Whitewater Lake (Ohio). Finally, this blog includes the story of the Rio Doce, a dam failure in Brazil that did incalculable damage.