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Intra-Storm Study of Solute Chemical Composition of Overland Flow Water in Two Agricultural Fields

Department of Natural Resource Sciences, McGill University, Macdonald Campus, 21111 Lakeshore Road, Sainte-Anne-de-Bellevue, QC, Canada H9X 3V9

View larger version (33K): [in a new window]   Fig. 1. Topographic map of both fields and location of instruments.

View larger version (12K): [in a new window]   Fig. 2. Design of the installation of the waterproof membrane.

View larger version (27K): [in a new window]   Fig. 3. Example of a hysteresis calculation based on the 3 June event for Field 1.

View larger version (35K): [in a new window]   Fig. 4. Hydrograph and hyetograph of each rain event. Lines with the open and closed circles are for Fields 1 and 2, respectively. The circles represent the sampling time. The lines were smoothed for a better visual presentation.

View larger version (25K): [in a new window]   Fig. 5. Dissolved cation concentrations and anion concentrations, plotted against the logarithm of time during the 3 June runoff event for Field 1.

View larger version (25K): [in a new window]   Fig. 6. Relationships between concentration of dissolved cations and anions and logarithmic values of suspended sediments in runoff during the first runoff event for Field 1.

View larger version (25K): [in a new window]   Fig. 7. Runoff concentrations of dissolved cations and anions over suspended sediments during a hydrological event for the first runoff event for Field 1. Note the different vertical scales for both graphs.