RESULTS OF EXTENSIVE FIELD MONITORING OF DOLOS BREAKWATERS

D. Phelp, S. Luger, A. Van Tonder, A. Holtzhausen

Abstract


The entrances to most of the ports in South Africa are protected by rubble mound breakwaters which have dolos armouring. As part of their maintenance programme, Portnet, the local Port Authority, has commissioned the CSIR to annually monitor the main breakwaters. A minimum of five years of photographic and other monitoring data have now been accumulated. This paper presents a brief description of the dolos breakwaters in South Africa, and the field monitoring techniques used to record the annual damage to the armouring. The results and analysis of the photographic monitoring are given in more detail. The application of these results are also presented, and some exciting new developments in breakwater monitoring are discussed.

Keywords


dolos; breakwater; field monitoring

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