Abstract
Environmental monitoring in the scope of the Water Framework Directive 2000/60/EC (WFD) is usually
expensive and requires considerable human effort. In this study, we analyzed data obtained by a WFD
coastal waters monitoring network over a three-year period (35 campaigns), with the aim to ascertain
is it possible to increase the monitoring efficiency and obtain more accurate results. As the trophic condition of the coastal waters of Valencia is primarily, but not entirely, determined by continental loads and
hydrodynamic conditions, additionally we analyzed related river basin pluviometry (daily frequency) and
oceanographic (one hour frequency) data. Chlorophyll a, salinity, rain and wave data time series were
analyzed separately, to identify any possible pattern. Analyzing coastal water bodies integrating all four
parameters, it is found strong interactions between coastal waters trophic conditions, sea hydrodynamics
and related basin pluviometry. Eight phytoplankton biomass scenarios associated to environmental conditions are identified and finally developed basis for a new efficient monitoring strategy and more accurate coastal waters assessment
