BioOne.org will be down briefly for maintenance on 17 December 2024 between 18:00-22:00 Pacific Time US. We apologize for any inconvenience.
How to translate text using browser tools
1 June 2009 Electrical Conductance — A Versatile Guide in Freshwater Science
J.F. Talling
Author Affiliations +
Abstract

Attention is directed to the many potential uses of specific electrical conductance (‘conductivity’) in the study of inland waters. Its measurement is capable of a precision useful in the detection of differences in a standing or flowing water-mass, but cannot be translated into measures of chemical concentration with equivalent absolute accuracy. Reasons — not infrequently neglected — include approximations in temperature correction, in allowance for a depression effect at higher ionic strength (salinity), and especially in the differences of specific conductance of chemically different ions. The last can be reduced by treating ionic concentration in chemical equivalents (e.g. meq L-1) rather than the usual units of mass (e.g. mg L-1) or molarity (e.g. mmol L-1); also by making allowance for the exceptionally high equivalent conductance of H+and OH- ions of significance in markedly acid and alkaline waters.

Measurement in the field has been helped by the development of small portable instruments with inbuilt temperature compensation, flow-through electrode systems and electrical output. Examples of both field and laboratory measurements, for the charting and interpretation of various field situations, are illustrated chiefly from the author's experience. They include broad chemical surveys; interrelation with normal chemical analysis; longitudinal change, water travel and nutrient uptake in river and stream systems; ionic fi01_65.gif particulate conversion; horizontal and vertical differentiation in lakes; and ionic changes induced by photosynthesis.

© Freshwater Biological Association 2009
J.F. Talling "Electrical Conductance — A Versatile Guide in Freshwater Science," Freshwater Reviews 2(1), 65-78, (1 June 2009). https://doi.org/10.1608/FRJ-2.1.4
Received: 25 August 2008; Accepted: 10 March 2009; Published: 1 June 2009
JOURNAL ARTICLE
14 PAGES

This article is only available to subscribers.
It is not available for individual sale.
+ SAVE TO MY LIBRARY

KEYWORDS
Conductivity
flow
salinity
Stratification
surveys
Tracer
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top