A continuous water-sampling and multiparameter measurement system for estuaries; an improved system for small vessels
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Open-File Report↗
Geology topics
Lee A. Dedini
Publications and source records attributed to Lee A. Dedini.
Water and sediment measurements in San Francisco Bay, California
Water samples collected in San Francisco Bay, the Gulf of the Farallones, and the delta of the Sacramento and San Joaquin rivers were analyzed for salinity, temperature, partial pressure of carbon dioxide (pCO 2 ), chlorophyll a, alkalinity, particulate organic carbon (POC), and the stable carbon isotope ratio ( δ 13 C) of the POC and total CO 2 . Water sampling occurred between January 1976 and March 1977. Bottom sediments for total organic carbon isotopic analyses ( δ 13 C(TOC)) were collected during August 1973. Numerical values are tabulated, sampling locations are identified, and the analytical methods are briefly described.
California↗
A continuous water sampling and multi-parameter measurement system for estuaries
Salinity, temperature, light transmissivity, oxygen saturation, turbidity, pH, pCO2, and chlorophyll a fluorescence of a pumped water sample are continuously measured with a system designed primarily for estuarine studies. Near-surface water from a depth of 2 m is sampled continuously while the vessel is underway or water at depths to 100 m can be collected with an in situ pump, in which case the sampling depth and temperature are measured by an in situ probe. The system is comprised of commercially available instruments, equipment, and components, and of specialized items designed and fabricated by the authors. Data can be read from digital displays and analog strip-chart recorders. Tables and figures describing specialized items are included.
Open-File Report↗
Particulate organic carbon in San Francisco Bay, California, 1971-1977
The organic-carbon content of suspended particulate matter is determined by wet oxidation and analysis of the resulting CO 2 with an infrared analyzer. Modifications of methods and improved designs of apparatus are presented. Results of particulate organic carbon (POC) analyses from 1971 through 1977 show that concentrations in North San Francisco Bay (estuary) typically decrease from the delta of the Sacramento and San Joaquin rivers to Golden Gate (seaward). Median winter (November through February) concentrations decrease from 85 to 30 µ g-at./L seaward. During March through October, median concentrations are higher and ranges are wider. Concentrations frequently exceed 250 µ g-at./L in the upper estuary. POC concentrations in South San Francisco Bay are highest at the southern reach. POC is more abundant during March through October than during winter, but POC is not as abundant in South San Francisco Bay as it is in the estuary.
California↗