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Soil Erosion and Sediment Sources in an Ohio Watershed using Beryllium-7, Cesium-137, and Lead-210

Department of Geological Sciences, Case Western Reserve University, Cleveland, OH 44106

View larger version (41K): [in a new window]   Fig. 1. Sample collection locations in the Old Woman Creek National Estuarine Research Reserve (OWC NERR) watershed.

View larger version (25K): [in a new window]   Fig. 2. Downcore activities of 210Pb in soil cores collected from undisturbed (Star Island), no-till (Site E, Fig. 1), and conventionally tilled (Site C, Fig. 1) locations in the Old Woman Creek watershed.

View larger version (25K): [in a new window]   Fig. 3. Downcore activities of 137Cs in soil cores collected from undisturbed (Star Island), no-till (Site E, Fig. 1), and conventionally tilled (Site C, Fig. 1) locations in the Old Woman Creek watershed.

View larger version (19K): [in a new window]   Fig. 4. (A) The 210Pb vs. 7Be activities in suspended sediment for all sites. (B) Subsets of the data from no-till and conventionally tilled subbasins.

View larger version (63K): [in a new window]   Fig. 5. Generalized sketch illustrating the distributions of 7Be, 210Pb, and 137Cs in soils under different tillage practices. In the radionuclide soil profiles, the shading and the sketches indicate radionuclide activity with depth in the 10- to 30-cm-deep soil profiles.