Applied geomorphology and arid regions
491
Figure 19.25. Windbreak system for protecting a palm grove. Nefta, Tunisia. Photo: J.L. Pefia.
Dune stabilization is the objective of several techniques, but their effectiveness is very
variable. Sometimes, however, it is only necessary to deviate the direction of a dune. If
dunes are small, it is sometimes decided to simply move the sand somewhere else. This
procedure is cheaper if it can be used in construction. The destruction of a dune by digging
ditches parallel to its axis is an expensive solution - and only temporary. Stabilization
with vegetation can be very expensive and the use of windbreaks or covering dunes with
Figure 19.26. Three fence system to protect extensive areas, such as villages, shops, yards, industrial
plants, and other features (after Kerr and Nigra, 1952).
491
Figure 19.25. Windbreak system for protecting a palm grove. Nefta, Tunisia. Photo: J.L. Pefia.
Dune stabilization is the objective of several techniques, but their effectiveness is very
variable. Sometimes, however, it is only necessary to deviate the direction of a dune. If
dunes are small, it is sometimes decided to simply move the sand somewhere else. This
procedure is cheaper if it can be used in construction. The destruction of a dune by digging
ditches parallel to its axis is an expensive solution - and only temporary. Stabilization
with vegetation can be very expensive and the use of windbreaks or covering dunes with
Figure 19.26. Three fence system to protect extensive areas, such as villages, shops, yards, industrial
plants, and other features (after Kerr and Nigra, 1952).