TRACE ELEMENTS AS AN INDICATOR OF MATERIALS ERODED FROM SURFACE SOILS
Using trace elements in soils and sediments to determine sources of soil erosion
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Surface materials eroded during land disturbance are recognized as an important non-point source contaminant that affects water quality and increases the infilling rates of waterways. This study examines: 1) the use of trace element concentrations as a tracer of materials eroded from soils, and 2) the relation between changes in land use and sediment yield. This study examines adjoining drainages that empty into an embayment of O Shaughnessy Reservoir (near Columbus, Ohio). Agriculture was the dominant land use in each drainage prior to 1920. Residential subdivisions dominate present land use ...
Surface materials eroded during land disturbance are recognized as an important non-point source contaminant that affects water quality and increases the infilling rates of waterways. This study examines: 1) the use of trace element concentrations as a tracer of materials eroded from soils, and 2) the relation between changes in land use and sediment yield. This study examines adjoining drainages that empty into an embayment of O Shaughnessy Reservoir (near Columbus, Ohio). Agriculture was the dominant land use in each drainage prior to 1920. Residential subdivisions dominate present land use in one drainage, while the other drainage remains predominantly agricultural. Soil samples were collected from both drainages and sediment cores were collected directly offshore each stream in the embayment. Samples were analyzed for trace and major elements using x-ray fluorescence. Based on the study results, overall sediment accumulation offshore the residential area is four times larger than agricultural land use. Recent sediment yields from the more heavily developed drainage is almost ten times larger than other drainage.
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