Water Quality Sampling Under Preferential Flow Conditions

by J. Boll, Cornell Univ, Ithaca, United States,
J. S. Selker, Cornell Univ, Ithaca, United States,
B. M. Nijssen, Cornell Univ, Ithaca, United States,
T. S. Steenhuis, Cornell Univ, Ithaca, United States,
J. Van Winkle, Cornell Univ, Ithaca, United States,
E. Jolles, Cornell Univ, Ithaca, United States,



Document Type: Proceeding Paper

Part of: Lysimeters for Evapotranspiration and Environmental Measurements

Abstract: Shallow wells, porous cup samplers, and wick and gravity pan lysimeters were used to observe the movement of bromide applied to the surface of a grass covered field during a 23 day period. The observed concentrations not only varied spatially over short distances, but more importantly, were significantly affected by the sampling device employed. Wick pan lysimeters are shown to be superior in determining loading to groundwater for the silt loam soil in the zone above the capillary fringe. Porous cup samplers in the capillary fringe also yielded consistent samples of the quality of water entering the aquifer as verified from shallow wells.

Subject Headings: Water quality | Water resources | Groundwater pollution | Measuring instruments | Porous media | Load factors | Groundwater

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