Effects Of Urbanization On The Magnitude And Frequency Of Floods On Small Streams In Tennessee PDF Download

Engineers involved in bridge, culvert and highway design often find it necessary to know the magnitude and frequency of discharge from small streams where the drainage basin is urbanized. In order to develop an adequate method for determining the frequency of floods on small streams in Tennessee, where urbanization is a factor, a considerable amount of runoff data are needed. At present there is a scarcity of runoff data from urban areas in Tennessee except in large metropolitan areas. With this in mind the U.S. Geological Survey and the Tennessee Department of Transportation entered into a cooperative agreement in July 1977 to collect data on streams draining less than about 25 mi squared in municipalities with populations ranging between 5,000 i and 100,000. The data collected under this project, in combination with urban runoff data collected in Memphis, Nashville and Knoxville, will give a full spectrum of runoff conditions likely to be experienced in Tennessee. A total of 22 sites have been instrumented across the State as shown in figure 1. Each of the four hydrologic areas as defined in the report "Technique for Estimating Magnitude and Frequency of Floods in Tennessee," 1976, by Randolph and Gamble is represented.