They must all be on a slight downhill grade so every terrace feeds the one
below
to provide overflow drainage during heavy rainfall but are dammed enough to
prevent
flooding and complete draining.
Here's a good pic of a large terraced region with forests along the slopes
(probably there because some terraces washed away opening up areas for
random tree seedlings to take root).
Here's the original image in its PBase gallery:
Matt Reichel | all galleries >> North India and Sikkim > Rice Paddies
Surrounding Git Dubling
http://www.pbase.com/image/32063358
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