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PETER R. WILCOCK, John Hopkins University e) Professor, Department of Geography and Environmental Engineering Baltimore MD 21218 (\J� River sedimentation processes and their role in river management; Mechanics of earth surface processes; laboratory and field experiments in sediment transport, open - channel flow, fluvial and hillslope geomorphology. Selected Courses: Introduction to Computation and Mathematical Modeling Open Channel Hydraulics Peter Wilcock received a B.S. (1978) in physical geography from the University of Illinois, an M.S. (1981) in geomorphology from McGill University, and a Ph.D. (19 87) in geology from the Massachusetts Institute of Technology. He joined the Hopkins faculty in 1987, specializing in problems of erosion and sedimentation and their role in river management. He has held a joint appointment in the Department of Civil Engineering since 1990. He teaches courses in fluid mechanics, mathematical modeling, open - channel flow, sediment transport, and river mechanics. He has co- authored a text on continuum mechanics for the earth and environmental sciences. Research Statement The core of our research has been on the mechanics of sediment transport, particularly the fluvial transport of mixed sand and gravel. Much of the work has been done in our laboratory flume, which was constructed on the ground floor of Ames Hall in 1988. We have also worked on a number of applications of mixed -size sediment transport, including the effect of land use on river channel change, the prescription of sediment maintenance flushing flows, downstream fining in gravel -bed rivers, and channel maintenance flows in mountain streams with water diversions. As part of these applications, we have focused increased attention on developing a transport model that is both accurate and simple enough to be practically applicable. We have developed a two - fraction approach that requires relatively simple input while capturing the essential features of the transport, including size - sorting and the transient passage of fine - grained sediment waves through a river system (see Wilcock, 2001, Earth Surface Processes and Landforms). More recently, we have developed two models for the transport of mixed -size sediments. One uses two fractions (sand and gravel) and the other uses many fractions. These are based on an unprecedented set of flume data in which we made coupled observations of flow, transport rate, and bed - surface size distribution for a range of transport rates with each of five different sediments. The models are referenced to the composition of the bed surface, rather than subsurface, making them general and capable of predicting transient conditions. The experiments are discussed in Wilcock, Kenworthy, and Crowe (Water Resources Research, Dec. 2001) and the data can be downloaded as an MS Excel document. Papers on the two models are on the verge of coming out (as of March 2002) in WRR and JHE. If you are reading this in, say, 2003, send me an email to remind me to update my web site with the references. A more general perspective on flow, bed, and sediment transport can be found in my contribution to the Fifth gravel -bed Rivers Workshop, which can be downloaded from the reference list below. While continuing to work on the details of transport and bed surface mechanics, we are also plunging into ever larger scales. We have begun collaborating on a project to build a model to route sand through the Colorado River in the Grand Canyon and we are developing an initiative to build a comprehensive sediment budget in the 132 mil watershed of the Upper Patuxent River, just north of Washington DC. The next big step is finding ways to apply sediment mechanics appropriately, accurately, and practically at the reach and watershed scale. Current Research Projects Modeling stream -bed surfaces: flume and theoretical study of bed surface change and armor development.