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the Gunnison River by 1946. Humpback suckers were common in the lower portion of the Gunnison but flannelmouth suckers were even more common. (Wydoski) 92. Chapman, H. H. 1933. Influence of overgrazing on erosion and watersheds. Civil Engineer- ing 3(2):74-78. This article discusses the idea that too little control of grazing and of other agencies harmful to the natural cover is the cause of the rapid increase in erosion and flood damage in the intermountain region. Engineering works alone cannot prevent destruction or restore the protection afforded by nature. The author suggests an inttnsive scientific study of the causes of erosion to determine means of control. 93. Chrostowski, H. P. 1972. Stream habitat studies on the Uinta and Ashley National Forest. U. S. Department Agricultural, Forest Service, Intermountain Region, Ogden, Utah. 149 pp. This is a compilation of stream habitat studies in the Uinta and Ashley National Forests. A large number of water factors are assessed such as velocity, volume, depth, and water surface; discharge and minimum streamflows are also considered. (Wydoski) 94. Chrostowski, H. P. 1976. Stream habitat and reduced flows. In: Instream flow needs. Volume I. Proceedings of the Symposium and Specialty Conference. Boise, Idaho. pp. 534-541. A combination of hydraulic geometry and selected habitat characteristics were evaluated to determine recommended winter flow releases in streams which will be impacted by water diversions associated with the Central Utah Project. Physical aquatic measurements were obtained from a series of cross-sectional transects along stream courses. Hydraulic geometry using Manning's formula were used to compute discharges, velocities, and friction factors at various reduced flow levels. Losses in habitat features GRAZING MANAGEMENT VEGETATION ECOLOGY HABITAT FLOW SURVEY HYDROLOGY WATER QUAL. WATER QUAN. FLOW WATER DIV. WATER QUAN. HABITAT ALT. 46