“We reviewed the available social-ecological, hydrological, and geochemical literature for the ecological systems of the San Juan Bay Estuary (SJBE), a site in the Environmental Protection Agency’s National Estuarine Program.The objective of the review is to gather in one place as much available information about the ecosystems of SJBE as possible, to summarize progress in the understanding of its functioning, to set the stage for the development of afact-based conceptual model of the SJBE, and to identify priority areas of new research opportunities.”

This report documents a hydrodynamic field investigation conducted to provide data for the development of a three-dimensional hydrodynamic model of the San Juan Bay and Estuary System in Puerto Rico. Representative results of a field investigation of the San Juan Bay Estuary System conducted from 22 June to 19 August 1995 are presented. They include short-term measurements of current speed and direction, salinity profiles, water samples, and water-level fluctuations. Long-term measurements include water-level monitoring, salinity measurements, and fixed-depth current speed, direction, and salinity. Field investigation equipment and methods used to collect the data are described, representative results of the data reduction methods are presented, and results of the investigation are summarized.