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| Titel |
Shoreline recovery from storms on the east coast of Southern Africa |
| VerfasserIn |
S. Corbella, D. D. Stretch |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 12, no. 1 ; Nr. 12, no. 1 (2012-01-02), S.11-22 |
| Datensatznummer |
250010399
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| Publikation (Nr.) |
 copernicus.org/nhess-12-11-2012.pdf |
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| Zusammenfassung |
| Episodic extreme waves due to sea storms can cause severe coastal erosion.
The recovery times of such events are important for the analysis of risk and
coastal vulnerability. The recovery period of a storm damaged coastline represents
a time when the coastline is most vulnerable and nearby infrastructure is at the
greatest risk. We propose that identification of the beach recovery period can
be used as a coastal management tool when determining beach usage.
As a case study, we analyse 37 yr of beach profile data on the east coast of
South Africa. Considering beach length and cross-sectional area, we establish
a global recovery period and rate and identify the physical characteristics
of the coastlines that either accelerate or retard recovery.
The beaches in the case study were found to take an average of two years to
recover at a rate of approximately 90 m3 m−1 yr−1. Beach
profiles with vegetated dunes recovered faster than urbanized beaches.
Perpendicular beach structures have both positive and negative effects on
beach recovery. Coastlines with rock outcrops in the surf zone tend to
recover slowly and long-term sediment loss was identified in cases where
storm damaged beaches have not recovered to pre-erosion levels. |
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