Hydrologic and sedimentologic data collected during three cruises at low water on the Mississippi River and some of its tributaries, July 1987-June 1988

摘要: Water, suspended-sediment, and bed-sediment samples were collected for physical (particle size mineralogy) chemical analysis (radioactive elements, trace metals, nutrients, petrochemical hydrocarbons, organic volatiles, pesticides, detergents, carbon, humic substances) from 21 sites on the Mississippi River its main tributaries. Three cruises made at low water during a 1-year period July 18, 1987, to June 7, 1988. The maximum measured discharge was about 10,400 cubic meters per second December 15, Vicksburg, Mississippi, suspended-sediment 354,000 metric tons day in Missouri Hermann, Missouri, 20, 1987. equal-width-increment (equal-transit-rate), depth-integration method used 10-40 verticals across river collect between 70 137 liters of with an isokinetic sampler (made Teflon prevent contamination). This report contains following hydrologic data associated samples: cross-sectional area river; mean depth; velocity; discharge; particle sizes; concentrations suspended sand, silt, colloid fractions; surface temperature conductivity locations river. These provide framework subsequent interpretive analyses three cruises.