CAUSES OF BEACH EROSION

8/9/2019 CAUSES OF BEACH EROSION

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CAUSES OF BEACH EROSIONCAUSES OF BEACH EROSION


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1. Dredging Rivers takes away sand

that would normally be carrieddownstream.


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2. Putting in place jetties disrupts

normal water flow and createsirregular sediment deposition.


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3. Urbanization along coastal landcauses beach erosion duringdevelopment.


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4. El Nino causes an increase in

storm frequency and stormintensity.


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5. Typhoons with raging winds

carry away sand.

5. Typhoons with raging winds

carry away sand.


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6. Hurricanes with pelting rain

carry away a lot of sand, morethan normal rains


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7. Earthquakes misguiding the

paths of Rivers causing the sandto be diverted elsewhere.


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8. Storm Waters cause over-

flowing of rivers then depositingthe sand on the river bank ratherthan down at the coastal lands.


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9. Rising sea levels eat away at the

sand by creating alternate tidalpatterns.


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10. Subsidence of the coast due toover pumping of ground water

causes the seas to extendfurther in land.


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11. Chemical erosion deteriatescoastal land utilizing salt water

and oxygen to destroy rockmaterial that comes in contact

with sea water.


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12. Tourism causes compaction oftidal sands and a further retreat

of the beach allowing waves toget inland further.


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13. Failed attempts at controllingbeach erosion in the past can

actually cause the problem toget worse; such as causing thewaves to rush back out to see

faster than before taking more

sediment with them.


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14. Deepening and widening of riverchannels cause deposition of sand

in the channel rather than oncoastal lands.


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Effects of bitch erosion


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1. the loss of previously availablebeach area, and


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2. the damage to beach property.


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There are three basic options for

dealing with an erosion problem:

take no action

take passive action by relocatingendangered structures

take aggressive but positive action tohalt the erosion via the use of

structural and nonstructuraltechniques.

CAUSES OF BEACH EROSION

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