Environ. Sci. Technol. 2001, 35, 3501-3506
Metal Distribution in Clark Fork River Sediments A N D Y D A V I S * ,† A N D D . A T K I N S ‡ Geomega, 2995 Baseline Road, Suite 202, Boulder, Colorado 80303, and Exponent, 4940 Pearl East Circle, Suite 300, Boulder, Colorado 80301
Accurate sampling of pore waters and sediments in gravel river beds is problematic because cobbles preclude most coring techniques, while the angularity of sand grains destroys the membranes of standard pore water samplers. In the Clark Fork River, the recipient of over 100 years of mining activity, a modified single tube corefreezing device was used to profile bed sediment (∼65% cobbles and 35% gravel substrate), and a novel pore water sampler was developed to collect interstitial water. In the sediment, the
