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An Update of Coastal Erosion in Puerto Rico - page 7 / 10

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Figure 10. Isla Cabras and the east side breakwater.

In 2000, rebuilding was required on the breakwater. Exposed coconut palms and damage to the breakwater showed continuing erosion.

El Tuque

This beach was modified by engineering activities several times after 1960. Between 1962 and 1987 the pattern was accretion on the northwest beach and erosion on the southeast beach. The measurement of accretion beween 1978 and 1987 was a result of beach replenishment in 1979. The fill was to restore the shoreline to its 1960 position. This fill was stabilized by a shore-connected groin and an offshore breakwater (Figure 11). Beach profiling and sand size analysis in 1992-1993 showed that the coarse sand fill was lost and fine sand and mud formed the adjusted beach. Comparison of the 1987 and 1999 aerial photographs show a return to shoreline retreat (Figure 12).

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