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Prediction of seasonal-low streamflow quantities

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Abstract
  • The study was conducted in order to obtain some understanding of the hydrologic characteristics of streamflow under dry weather conditions, and from this knowledge develop some means for prediction of seasonal-low streamflow quantities. It was considered desirable to prepare "drought frequency plots" for a number of watersheds of varying sizes and from many regions of our country. It was hoped that the drought frequency plots could be utilized in the development of charts, tables or graphs for the prediction of low­flow quantities that could be expected, at a selected frequency for any chosen watershed. A certain success was realized and a "Probability Graph" was developed for the prediction of watershed low-flow water yield based on typical streamflow records. This graph predicts "low-flow water yield", using the parameters of "median value of 9 or more consecutive years of low-flow data" and "selected recurrence interval". It is a simplified approach to low-flow predictions which does not take into account directly the many variables of watershed cover, soil types, steepness of terrain, climatic conditions, habitation, and the like. Even so, surprising accuracy of prediction is indicated.
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  • U.S. Department of the Interior, Office of Water Resources Research, PL 88-379
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  • 3549871 bytes
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