Contour bunding
Contour bunds are a typical bund constructed
along the contour and across the slope. The main objective of contour bunding is
to create a mechanical obstruction to the runoff water for its slower movement
during high rainfall. This structure attempts to retain the rainwater within
the bunds and allow less water to flow as runoff. The vertical interval between
two consecutive contour bunds is adjusted to 0.5-1 m depending on the slope, soil
depth and land use type. This type of bund is suitable for lands with slopes
lesser than 6%. This system is most suitable for a low rainfall area below 75
cm annually.