The Maumee River Basin Pilot Watershed Study. Volume II. Sediment, Phosphates, and Heavy Metal Transport, Defiance Area, Ohio

摘要

Losses of nutrients and sediments from agricultural land were monitored during 1975-1977 in the Maumee River Basin, Ohio. Special studies were made on sediment mineralogy and chemistry and on sediment, pesticide, and metal sediment transport. Suspended sediments were higher in total-P (phosphorus) and labile-P than soils or stream-bottom sediments. Sediments are enriched in P during erosion and transport because of preferential transport of clay which is higher total P than the whole soil. Preferential clay transport changed sediment mineralogy from its original soil mineralogy. Heavy metal concentrations were low and indicated that groundwater and eroded soil were the major source.