Data Reduction Methods for Hydrologic Analysis

by Keith L. Lewinger, County Sanitation Districts of Los Angeles County, Los Angeles, Calif.,
Edward A. McBean, Asst. Prof.; Dept. of Civ. Engrg., Univ. of Waterloo, Ontario, Canada,
Daniel P. Loucks, (M.ASCE), Assoc. Prof.; School of Civ. and Environmental Engrg., Cornell Univ., Ithica, N.Y.,


Serial Information: Journal of the Hydraulics Division, 1975, Vol. 101, Issue 1, Pg. 17-27


Document Type: Journal Paper

Abstract: Three numerical methods are described for reducing the quantity of data required to define the time series of relatively stable hydrologic parameters. The percentage reduction obtained depends on the allowable measurement and approximation error and the percentage of time this total error may be exceeded. The hydrologic data used in this study suggest that reductions of 25% or more may be possible without a significant loss of accuracy if the measured data are within 5% - 10% of the true value 95% of the time.

Subject Headings: Hydrologic data | Data processing | Numerical methods | Errors (statistics) | Time series analysis | Parameters (statistics) | Approximation methods

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