Continuous water sampling and water analysis in estuaries

Open-File Report 82-551
By:  and 



Salinity, temperature, light transmission, oxygen saturation, pH, pCO2, chlorophyll a fluorescence, and the concentrations of nitrate, nitrite, dissolved silica, orthophosphate, and ammonia are continuously measured with a system designed primarily for estuarine studies. Near-surface water (2-m depth) is sampled continuously while the vessel is underway; on station, water to depths of 100 m is sampled with a submersible pump. The system is comprised of commercially available instruments, equipment, and components, and of specialized items designed and fabricated by the authors. Data are read from digital displays, analog strip-chart recorders, and a teletype printout, and can be logged in disc storage for subsequent plotting. Data records made in San Francisco Bay illustrate physical, biological, and chemical estuarine processes, such as mixing and phytoplankton net production. The system resolves large- and small-scale events, which contributes to its reliability and usefulness.

Additional publication details

Publication type Report
Publication Subtype USGS Numbered Series
Title Continuous water sampling and water analysis in estuaries
Series title Open-File Report
Series number 82-551
DOI 10.3133/ofr82551
Edition -
Year Published 1982
Language ENGLISH
Publisher U.S. Geological Survey,
Contributing office(s) Pacific Regional Director's Office, San Francisco Bay-Delta
Description 28 p., ill., maps ;28 cm.
Online Only (Y/N) N
Additional Online Files (Y/N) N