tailieunhanh - Alternatives for coastal protection

A brief overview of some available alternative systems for shore stabilization and beach erosion control is presented. Special attention is paid to artificial reefs and geosystems. Geosystems have gained popularity in recent years because of their simplicity in placement, cost effectiveness and environmental aspects. | Alternatives for coastal protection Krystian Pilarczyk1 Abstract A brief overview of some available alternative systems for shore stabilization and beach erosion control is presented. Special attention is paid to artificial reefs and geosystems. Geosystems geobags geotubes geocontainers geocurtains etc. have gained popularity in recent years because of their simplicity in placement cost effectiveness and environmental aspects. However all these systems have some advantages and disadvantages which have to be recognized before application. For design and installation criteria the reader is guided to relevant documents. Keywords coastal protection alternatives artificial reefs geotextiles geosystems 1. Introduction Coastal users and managers all over the world are frequently faced with serious erosion of their sandy coasts. Possible causes of erosion include natural processes . action of waves tides currents sea level rise etc. and sediment deficit due to human impact . sand mining and coastal engineering works . Countermeasures for beach erosion control function depend on local conditions of shore and beach coastal climate and sediment transport. Continuous maintenance and improvement of the coastlines together with monitoring and studies of coastal processes have yielded considerable experience on various coastal protection measures all over the world. In general a coastal structure is planned as a practical measure to solve an identified problem. Starting with identification of the problem . shoreline erosion a number of stages can be distinguished in the design process for a structure definition of functions determination of boundary conditions creating alternatives geometrical design and the final choice of functional solution. After the choice of functional solution has been made the structural design starts including creating structural alternatives ie. using different materials and various execution methods . The final choice will be made after .