Cliff stabilization: Difference between revisions
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'''Cliff stabilization''' is a [[coastal management]] technique |
'''Cliff stabilization''' is a [[coastal management]] [[erosion]] control technique. is most suitable for softer or less stable cliffs. Generally speaking, the cliffs are stabilised through [[dewatering]] (drainage of excess rainwater to reduce water-logging) or [[anchoring]] (the use of terracing, planting, or wiring to hold cliffs in place). |
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==Details== |
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[[Image:cliffstab1.jpg|right|thumb|400px]] |
[[Image:cliffstab1.jpg|right|thumb|400px]] |
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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. |
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Reducing ground water pressure is possibly the single most important factor in improving slope stability. Engineers attempt to stop rain from soaking into the ground by means of shallow drainage (porous pipes, rubble filled channels etc.) which lead the water away from vulnerable areas. |
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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. |
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Revision as of 22:32, 10 March 2007
Cliff stabilization is a coastal management erosion control technique. is most suitable for softer or less stable cliffs. Generally speaking, the cliffs are stabilised through dewatering (drainage of excess rainwater to reduce water-logging) or anchoring (the use of terracing, planting, or wiring to hold cliffs in place).
