"The present status of data from watersheds in the under 10 square mile drainage area classification, pages much to be desired. However, this study of 45 small watersheds within the State of Missouri gives an indication that surface runoff from these basins may be predicted with a fair degree of accuracy. The inclusion of a shape factor AL2 and its use as a portion of the "basin index" (AL2S1/2) gives accurate results as a predictor of the "mean annual flood". The mean annual flood may be adequately computed by the formula, MAF = 113(AL2S1/2), In the drainage basin size of 1.5 sq mi to 10.0 sq mi. The use of the information presented in this study indicates that the hydrologic areas as presently used in flood frequency studies could be better defined by using a length of basin ratio rather than a Q10/Q2.33 ratio. This conclusion is based on the development of the relationship of length of basin to drainage area size, L =1.54 A0.5, for drainage basins in the State of Missouri.
Results of this study may be used to obtain the mean annual flood for drainage basins within the State of Missouri. However, the use of this "basin index" Is limited at present to watersheds from 1.5 to 10.0 square miles in size. The effect of cover, soil type, rainfall intensity, and slope are adequately compensated for in this range of sizes. The rainfall intensity and cover seem to have their greatest effect in the watershed size below 1.5 square miles, and further study in this range is desired to explain the proportionate effect of each of these variables"--Abstract, page ii.
Muir, Clifford D.
Atchley, B. L. (Bill L.)
Gevecker, Vernon A. C., 1909-1992
Kerr, Richard H., 1907-1980
Civil, Architectural and Environmental Engineering
M.S. in Civil Engineering
Missouri School of Mines and Metallurgy
ix, 187 pages
© 1962 Terence E. Harbaugh, All rights reserved.
Thesis - Open Access
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Harbaugh, Terence E., "A study of small watersheds within the State of Missouri" (1962). Masters Theses. 2732.