Trace-Element Transport in Clear Creek and the South Platte River

Map and Data for This Study

• Objectives:
  Identify the trace elements present in Clear Creek and the South Platte River through Denver.
  
  Determine the mechanism for transport of trace elements in the water column: Dissolved - less than 0.01 micrometer, Colloidal - less than 0.45 micrometer and greater than 0.01 micrometer, Particulate - greater than 0.45 micrometer.
  
  
• Approach:
  Sampled 11 sites along Clear Creek and the South Platte River, one to three times, during high and low flow conditions. Filtered samples through different pore sizes to determine the fraction of each trace element associated with various particle sizes.
  
  
• Timing:
  Spring and Summer 1994
  
  
• Targeted Physical and Chemical Data:
  Flow, pH, specific conductance, dissolved oxygen, water temperature, arsenic, barium, beryllium, cadmium, chromium, cobalt, copper, iron, lead, manganese, molybdenum, nickel, silver, zinc, antimony, aluminum, selenium, uranium.