Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Development and demonstration of a bidirectional advective flux meter for sediment-water interface [electronic resource] /
Author Lien, Bob K. ; Lien, B. K.
CORP Author National Risk Management Research Lab., Cincinnati, OH. Office of Research and Development.
Publisher U.S. Environmental Protection Agency, Office of Research and Development, National Risk Management Research Laboratory,
Year Published 2006
Report Number EPA/600/R-06/122
Stock Number PB2007-107561
Subjects Groundwater flow. ; Groundwater flow--Measurement.
Additional Subjects Water transport ; Measurement ; Sediment-water interface ; Biodirectional advective flux meter ; Flow sensor ; Flow measurement ;
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
NTIS  PB2007-107561 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 10/08/2007
Collation 1 online resource (vii, 87 p.) : ill., charts, digital, PDF file.
A bidirectional advective flux meter for measuring water transport across the sediment-water interface has been successfully developed and field tested. The flow sensor employs a heat-pulse technique combine with a flow collection funnel for the flow measurement. Because the direction of flow was initially unknown, the heater was located in the center of the flow tube. Two thermocouples were symmetrically placed to both sides of the heater for temperature monitoring. For each measurement cycle, the heater generates and injects a heat-pulse to the center of the flow tube, the water flow inside the flow tube carries the heat-pulse down gradient, and the temperature is monitored at each thermocouple over time. In theory, the heat-pulse arrival time is inversely proportional to the flow rate. The bidirectional feature of the flux meter is realized through the temperature measuring capability on either side of the flow tube. The system has automatic data acquisition, real time data display, and signal display/analysis capability.
"November 2006." Title from title screen (viewed on Nov. 4, 2010). "EPA/600/R-06/122." Includes bibliographical references (p. 30-32).