HR: 1340h
AN: H13C-0422    [Abstracts]
TI: The Passive Surface Water Fluxmeter to Measure Cumulative Water and Solute Mass Fluxes
AU: * Klammler, H
EM: haki@gmx.at
AF: Dept. of Civil and Coastal Engineering, Univ. of Florida, 365 Weil Hall, Gainesville, FL 32611 United States
AU: * Klammler, H
EM: haki@gmx.at
AF: Dept. of Hydraulic Structures and Water Resources Management, Graz Univ. of Technology, Stremayrgasse 10, Graz, 8010 Austria
AU: Hatfield, K
EM: khatf@ce.ufl.edu
AF: Dept. of Civil and Coastal Engineering, Univ. of Florida, 365 Weil Hall, Gainesville, FL 32611 United States
AU: Annable, M
EM: annable@ufl.edu
AF: Dept. of Environmental Engineering Sciences, Univ. of Florida, 217 Black Hall, Gainesville, FL 32611 United States
AU: Jawitz, J
EM: jwjawitz@ifas.ufl.edu
AF: Inst. of Food and Agricultural Sciences, 2169 McCarty Hall, Gainesville, FL 32611 United States
AU: Padowsky, J
EM: jcpadowsky@ifas.ufl.edu
AF: Inst. of Food and Agricultural Sciences, 2169 McCarty Hall, Gainesville, FL 32611 United States
AB: Flux and discharge based data are increasingly being viewed as critical information needed to address various components of contaminant hydrology such as source prioritization, risk prediction, compliance monitoring, remediation endpoint evaluation, and contaminant attenuation assessment. Numerous methods exist to measure instantaneous or cumulative local water flow velocities (fluxes) and global discharges in stream transects. Measurements of solute mass discharges are currently performed by measuring solute concentrations at discrete moments in time and discrete locations across a stream transect. These measurements have to be combined with the independently obtained water flow velocities or discharges to arrive at estimates of local instantaneous solute mass fluxes. In general, water flux and solute concentration data are not obtained at coincident points in time or space, thus introducing some conceptual error. Furthermore, cumulative solute mass discharges are only obtained from a temporal and spatial interpolation and integration of the data. The method proposed here makes use of a Passive Surface Water Fluxmeter (PSFM), which is capable of directly measuring local cumulative or time averaged water and solute mass fluxes in surface water flow systems. This is, the PSFM gives direct estimates of solute mass fluxes without requiring independent water flux and concentration measurements. Furthermore, due to its passive nature, it inherently performs the time integration of local water and solute mass fluxes. Several PSFMs can be deployed along a stream transect, where each PSFM delivers data at a number of depths. This results in a point matrix of cumulative flux measurements that can be interpolated and integrated to arrive at estimates of the global water and solute mass discharges. Results of first laboratory flume experiments with the PSFM will be presented.
DE: 1806 Chemistry of fresh water
DE: 1860 Runoff and streamflow
DE: 1871 Surface water quality
DE: 1894 Instruments and techniques
SC: Hydrology [H]
MN: 2004 AGU Fall Meeting