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Low latitude island beach processes

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LOW LATITUDE ISLAND BEACH PROCESSES. by Munesh Munbodh. Project Report submitted to Marine Resource Management Program School of Oceanography Oregon State University 1981 in partial fulfillment of the requirements for the degree of Master of Science. LOW LATITUDE ISLAND BEACH PROCESSES. by Munesh Munbodh. Project Report submitted to Marine Resource Management Program School of Oceanography Oregon State University 1981 in partial fulfillment of the requirements for the degree of Master of Science. Contents Introduction 1 Uses of the beach 1 The dynamic nature of beaches 3 Islands and beaches 8 Beach composition 9 Grain size of beach materials 11 Sediment formation from the reef 13 The littoral sand budget 15 Erosion , 17 Effects of storms on beaches 20 Effects of recreation on beaches 22 Other processes 23 Beach and shoreline protection 24 Effects of sand mining 28 Mauritius coast and beaches 30 Concluding remarks 39 Appendix • LOW LATT2UDE ISLAND BEACH PROCESSES Introduction Beaches form the interface between the land and the sea in most parts of the world except where the coast ends abruptly in cliffs. The relation of the beach to its environ- ment is at first sight not apparent and , we may be tempted to think of it in isolation. However, the beach is an integral part of the coastal zone and must be understood in the context of that system. This paper describes beach processes in general with emphasis on subtropical and tropical regions. A section on the effects of sand dredging in the lagoon is included as this activity is very important due to its direct and in- direct effects on the beach. Uses of the beach The beach is a constant attraction for people on holidays and those just touring the country. Pleasant weather con- ditions prevailing in subtropical and tropical areas make it possible for people to enjoy the beach year-round. Creation of facilities for people visiting the beach has resulted in much of th

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