The source of suspended sediment, major nutrients, BOD, and organic carbon in the Minnesota River.The effects these sources have on water quality in the Minnesota River.The relationships between suspended sediment, major nutrients, BOD, algal productivity, and organic carbon.The transport of suspended solids, nutrients, and oxygen demanding substances in the Minnesota River.The relative significance of instream sediment sources and non-point sources of pollution. It was determined that run-off was the major source of suspended sediment and nutrients in the Minnesota River mainstem.