U.S. Geological Survey
By L.S. Balistrieri, R.F. Ortiz, P.H. Briggs, K.A. Elrick, and F. Edelmann
The exchange or flux of dissolved metals across the sediment-water interface was examined at three sites in Terrace Reservoir, Canejos County, Colorado during June, July, August, and September, 1994, and June 1995. This report presents the approaches used for determining dissolved fluxes across the sediment-water interface, field sampling and laboratory methods, analytical results, and results of flux calculations. In addition, there are discussions addressing the direction and magnitude of dissolved copper (Cu), zinc (Zn), cobalt (Co), and manganese (Mn) fluxes in Terrace Reservior, the significance of those fluxes relative to transport of dissolved metal by inflowing or outflowing Alamosa River water, and the infjluence of sorption of dissolved metal by iron oxyhydroxide surfaces and pH variations within the reservoir on the direction and magnitude of those fluxes.