ABSTRACT
This chapter treats some aspects of the construction of protections. It starts with an overview of some equipment, and describes the execution of bed, bank and shore protection works. The chapter deals with quality assurance. The circumstances during construction have such a large influence on the productivity and the final quality of the structure that it is necessary to have at least some statistical data on the conditions at the construction site. Frequencies of waterlevels, currents, waves and wind should be available or estimated before starting. During construction or maintenance, a good weather forecast is indispensable. Some activities are preferably not planned during the relatively rough season. In the Netherlands, for example, the execution of works involving sea defences is forbidden by law between October and April. In tropical countries, monsoons can create conditions lasting months, in which operations along a coast are risky or practically impossible.
