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Evaluating the relative amounts of stored or moving water through the different components of the hydrological cycle is required for precise management and planning of water resources. An important aspect of this evaluation is the partitioning of streamflow into surface and baseflow components. A prior study evaluated forty different approaches for hydrograph-partitioning on a field scale watershed in the Coastal Plain of the Southeastern United States and concluded that the Boughton method produced the most consistent and accurate results. However, its accuracy depends upon the proper estimation of: 1) the inflection point on the recession limb of the hydrograph, and 2) the fraction factor () that is function of many physical and hydrologic characteristics of a watershed. Proper identification of the inflection point was accomplished by using a 2nd derivative approach, which was automated by writing a computer program in Visual BASIC. Applying this approach to twelve years of streamflow data proved to be accurate for 87% of the time. Estimation of the value was accomplished in this study using two steps; first, alpha was fitted to individual hydrographs, and, second, a regression equation that determines these alpha values based on watersheds hydrologic characteristics (e.g. rainfall, evaporation) was developed. Using these strategies for identifying values and inflection points improved the streamflow partitioning methods performance significantly. It is anticipated that these improvements will contribute to the accuracy of this method on streamflow partitioning for large-scale watersheds with diverse soils and cover conditions.