Environmental Engineering Reference
In-Depth Information
Chapter 4
Beach Renourishment Principles
Abstract
This chapter provides a discussion of fundamental beach renourishment
principles, including the need for preliminary investigations, sources of sediment
for beach renourishment, methods of beach renourishment, design considerations,
techniques for monitoring changes, assessment of performance and modelling.
Experience from various beach renourishment projects and their design and imple-
mentation is here used for discussion of the following topics:
4.1.
The need for preliminary investigations
4.2.
Sources of sediment for beach renourishment
4.3.
Methods of beach renourishment
4.4.
Design considerations
4.5.
Monitoring changes after beach renourishment
4.6.
Assessment of beach performance
4.7.
Modelling of beach renourishment
4.8.
Beach renourishment for coast protection
4.1 The Need for Preliminary Investigations
It is necessary to decide where and why beach renourishment is necessary, where
and how sediment should be delivered to the shore, and what difficulties are likely
to be encountered during and after renourishment. A preliminary investigation
should include:
• The dimensions and morphology (with transverse proiles) of the beach and
nearshore (including the breaker zone).
• The relationship of the beach to nearby cliffs, bluffs, reefs, river mouths, tidal
inlets and drains.
