Agricultural Terraces
Terraced fields combine
the elements of Water and Earth, for they not only help to retain
moisture in the ground but also help to prevent soil erosion.
Soil erosion is, itself, a
threat to water supply since hill-wash can clock lakes and reservoirs with
sediments, as is currently occurring in the reservoir in Gondar, Ethiopia - click below for a short film that
illustrates the connection between soil erosion and water supply