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Book: Landscape Planning and Environmental Impact Design: from EIA to EID
Chapter: Chapter 9 River engineering, channelization and floods

Forest clearance and flooding

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Forest clearance accentuates flooding.

A forest can absorb rainwater, like a great sponge, and help it run into the ground. This benefit is removed when the forest is removed. The current plight of Bangladesh is a tragic example (Khalil, 1993). At one time there were great swamps and forests in the foothills of the Himalayas. Malaria kept humans out. After the introduction of anti-malarial drugs, the forest was cleared and the rate of run-off greatly accelerated. Periodically, this causes terrible floods and loss of life in Bangla Desh [Fig 9.2]. The developed countries which have removed their forests have also increased their liability to flooding. Axemen have no interest in EID.