Bed-Sediment and Fish Tissue Studies are the primary means by which
trace elements and hydrophobic (not dissolved in water) organic
are initially assessed in NAWQA. Concentrations of these compounds and
their areal distribution are assessed to identify potential sources and
needs for more detailed study. Data for concentrations in bed sediment
and fish tissue collected at the same sites are used for an initial
of biological availability. When a compound is found in both the bed
and the fish tissue, the compound is considered biologically available.
Personnel to contact about a specific subject are listed on the staff page.
U.S. Department of the Interior
U.S. Geological Survey
221 North Broadway, Urbana, IL 61801, USA
Last modified: 14:30 CST Thurs 11 May 2000