Newsletter and Technical Publications
<Sourcebook of Alternative Technologies for
in Small Island Developing States>
PART A - INTRODUCTION
4. HOW TO USE THE SOURCE BOOK
The first step in the use of this Source Book is to determine the type
of island on which it is desired to implement a water resources
development project. This helps to determine the choice of technologies
applicable to that particular island(s) type(s). A discussion of the
parameters that are used in this book to classify small island types is
included in Section 5, Methodology, below.
Plate 1. Very small 'low' islands or coral atolls with
non-existent surface freshwater.
Small islands can differ considerably and, for the purpose of this
study, a distinction has been made between (i) very small, "low"
islands (see Plate 1), and (ii) small, "high" islands (see Plate
2). Very small, low islands are generally characterised as coral atolls
and sand islands with no surface freshwater resources, whilst small, high
islands are characterised as volcanic Plate 2. Small 'high' islands where
surface freshwater may exist.
Plate 2. Small 'high' islands where surface freshwater
and bedrock islands, or raised limestone and porous volcanic islands,
where surface waters may exist. Technologies which are applicable to both
types of small islands, which may be and often are applied in conjunction
with more specific technologies, are found in Part B, Section 1, while
technologies applicable to each particular island group are found in Part
B, Sections 2 and 3, respectively. In addition, there may be islands where
none of the technologies listed in Sections 2 and 3 are applicable, due to
limiting factors such as little or no available freshwater, high
population densities, etc., and on which it may be necessary to introduce
more specialised, and, in many cases, more expensive, technologies for the
augmentation of freshwater resources. These highly-specialised
technologies are found in Part B, Section 4, and include desalination,
importation and dual water systems.