1. USDA‐ARS National Sedimentation Lab. P.O. Box 1157 Oxford MS 38655
2. Dep. of Biosystems Engineering and Soil Science Univ. of Tennessee 2506 E.J. Chapman Drive Knoxville TN 37996‐4531
3. USDA‐NRCS West National Technology Support Center 1201 NE Lloyd Blvd. Portland OR 97323