Hydraulic and geomorphic classification of the UMRS Bhowmik, N. G. and R. Xia. 1992. Hydraulic and geomorphic classification of the Upper Mississippi River System: Pilot study of three pools. Pages 666-671 in M. Jennings and N. G. Bhowmik, editors. Proceedings of the American Society of Civil Engineers Hydraulic Engineering Sessions at Water Forum '92, Baltimore, Maryland, August 2-6, 1992. Reprinted by the National Biological Survey, Environmental Management Technical Center, Onalaska, Wisconsin, August 1994. LTRMP 94-R007. 6 pp. (NTIS #PB94- 209533) ABSTRACT A pilot classification system has been developed for three trend analysis pools: 4, 8, and 13, on the Upper Mississippi River System (UMRS). Various physical parameters such as widths, radius of curvatures, and deflection angles; and attributes such as orientation of various non-main channel areas were utilized in this classification system. The techniques and the methodology developed here should be used in the classification of the entire Upper Mississippi River System. This type of classification will be needed to properly manage the system for the benefit of navigation, commerce, recreation, ecology, and the environment. KEYWORDS Geomorphic classification, aquatic areas, Mississippi River, hydraulics, aquatic habitats, backwaters, navigation pool