Accession Number : ADP007788

Title :   Studies on the Comparison of In-Situ and Laboratory Sediment Oxygen Demand Measurement Techniques,

Corporate Author : TUFTS UNIV MEDFORD MA DEPT OF CIVIL ENGINEERING

Personal Author(s) : Whittmore, Ray C.

Report Date : JUN 1992

Pagination or Media Count : 10

Abstract : A uniform procedure for the measurement of sediment oxygen demand (SOD) has not been agreed upon by water quality modelers. In order to as is critical sink of dissolved oxygen (DO) in assimilative capacity studies, modelers use one or more methods which include in situ respirometry, undisturbed laboratory cores, and simply varying SOD to achieve model calibration. The 1983 Water Pollution Control Federation Annual Conference sponsored four sessions on SOD theory and measurement (Hatcher 1985). Those participating in these sessions generally agreed that in situ measurements were more reliable than the other methods because they least disturbed the sediment water column interface, or did not rely upon complete knowledge of other DO sinks (model calibration). Others at the conference, however, suggested that undisturbed laboratory cores could be effectively used because both field and personnel time are minimized when compared to the in situ techniques. They also suggested that sediment cores could be collected by trained divers with minimal disturbance of the sediment-water column interface. Because there are few controlled studies that directly compare in situ with laboratory core measurements, the general utility of laboratory SOD methods has not been properly evaluated.

Descriptors :   *DIVERS, *MEASUREMENT, *WATER QUALITY, CALIBRATION, CONTROL, CORES, INTERFACES, LABORATORIES, MODELS, OXYGEN, PERSONNEL, POLLUTION, QUALITY, SEDIMENTS, THEORY, TIME, WATER, WATER POLLUTION, SYMPOSIA.

Subject Categories : Geology, Geochemistry and Mineralogy
      Physical and Dynamic Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE