Cliff stabilization: Difference between revisions
splice out of coastal management |
No edit summary |
||
| Line 1: | Line 1: | ||
{{wikify}} |
|||
[[Image:cliffstab1.jpg|right|thumb|400px]] |
[[Image:cliffstab1.jpg|right|thumb|400px]] |
||
'''Cliff stabilization''' is a [[coastal management]] technique; it drains off excess rainwater to reduce water-logging and uses terracing, planting. and wiring to hold cliffs in place. |
'''Cliff stabilization''' is a [[coastal management]] technique; it drains off excess rainwater to reduce water-logging and uses terracing, planting. and wiring to hold cliffs in place. |
||
Revision as of 19:05, 9 March 2007
 | Template:Wikify is deprecated. Please use a more specific cleanup template as listed in the documentation. |
Cliff stabilization is a coastal management technique; it drains off excess rainwater to reduce water-logging and uses terracing, planting. and wiring to hold cliffs in place.
This erosion control technique is most suitable for softer or less stable cliffs. Generally speaking, the cliffs are stabilised through dewatering or anchoring or a mixture of the two. Reducing ground water pressure is possibly the single most important factor in improving slope stability. While you cannot stop rain falling from the sky you can stop it soaking into the ground by means of shallow drainage (porous pipes, rubble filled channels etc.) which lead the water away from vulnerable areas.
Alternatively, adding weight to the base of a coastal slope can improve stability. Anything will do to provide the weight but because the toe of the slip is in the sea it is obviously best to use something that will not be affected by storm action so large rocks are usually used. Of course it doesn’t have to be rocks which can be used as toe weighting. A substantial beach of shingle or of sand is not only good as an amenity it also acts as a counterweight to hold a cliff in position. The problem is that if the beach is lost and not replenished then there is a danger that slips will take place because of the loss of support.