The purpose of studying activities around the site,
or within its catchment, are two-fold. In the first
instance, it is to determine whether there are any
activities being undertaken which generate factors
to which conservation features are sensitive, i.e.
to determine potential vulnerability of those features,
and therefore to assess whether further studies,
particularly of water quality parameters, are required.
Secondly, where further studies indicate there is
a need for management, more detailed information
on activities may be required to determine the most
effective management measures; such information
will be partly gathered by monitoring and modelling
of relevant inputs to the site (see next section).
The degree to which contributing activities are
differentiated, e.g. breaking down "agriculture"
into different farming practices, will depend on
the information available and the information required
to implement effective management measures. Work
around the Fleet, and review of potential water
quality issues in lagoons, indicates that activities
to be considered are likely to include some of all
of the following:
- agriculture (direct run-off, via streams, via
atmosphere, changes in land use);
- point discharges - both direct and indirect
via streams (sewage treatment works, storm overflows,
- atmospheric discharges;
- run-off or pollution incidents from adjacent
urban or industrial development;
- dumping of waste;
- developments that affect or change the physical
structure of the lagoon, including channels within
it, leading to reduced flushing or seawater ingress,
including percolation, e.g. coastal defence works;
- development/abstraction reducing freshwater
input and subsequent effect not only on salinity
but also flushing.