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A Methodology to Estimate the Denitrifying Capacity of a Riparian Wetland

^a Ecole Polytechnique Fédérale de Lausanne (EPFL), GEOLEP, GR B 1 383 (Bâtiment GC), Station no. 18, CH-1015 Lausanne, Switzerland
^b Ecole Polytechnique Fédérale de Lausanne (EPFL), LPE, GR B 1 423 (Bâtiment GR), Station no. 2, CH-1015 Lausanne, Switzerland

View larger version (46K): [in a new window]   Fig. 1. Map of the study site showing (a) major physical constraints, slope, altitude, land use, and (b) soil type.

View larger version (33K): [in a new window]   Fig. 2. Map of the study site showing major physical constraints, location of the piezometers, and contours of the ground water flow (drawn for April 2000).

View larger version (43K): [in a new window]   Fig. 3. Map of the study site showing (a) thickness of the saturated zone and (b) water table position below the ground surface. The grid is 100 x 100 m.

View larger version (32K): [in a new window]   Fig. 4. Water table position from September 1998 to October 2000 in relation to the soil-denitrifying classes for selected piezometers. Numbers indicate soil-denitrifying classes. See Fig. 2 for the location of the piezometers.

View larger version (43K): [in a new window]   Fig. 5. Map of the study site showing (a) total thickness of the soil-denitrifying Class 3 and (b) thickness of Class 3 interacting with ground water. The grid is 100 x 100 m.

View larger version (46K): [in a new window]   Fig. 6. Map of the study site showing (a) total thickness of the soil-denitrifying Class 2 and (b) thickness of Class 2 interacting with ground water. The grid is 100 x 100 m.