Natural Streams Cross Section Study
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Natural Streams Cross Section Study

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  • Alternative Title:
    The Hydrologic Decade Interim Report on Natural Streams Cross Section Study
  • Creators:
    Stovicek, Frank K.
  • Corporate Creators:
    United States. Department of Commerce. Bureau of Public Roads
  • Subject/TRT Terms:
  • Resource Type:
    Tech Report
  • Right Statement:
    Public Domain
  • Geographical Coverage:
    United States
  • Edition:
    Interim Report
  • Corporate Publisher:
    United States. Department of Commerce. Bureau of Public Roads
  • Abstract:
    Introduction. This hydrologic study is based on Potter's hypothesis that a stream writes its own life history in the shape of its channel and adjacent flood plain. As a background to this hypothesis were studies of flood occurrences, showing definitely that maximum annual peaks plotted on extremal probability paper define two frequency curves representing different populations. The appearance of the transition period between the two curves, which was found to be in the range of five to ten years' frequency, generated the idea that somewhere in nature the streams would have expressed this difference of populations and transition during the formation of the stream bed. This hypothesis was substantiated by other hydrologists who were looking simultaneously and independently into problems of hydrology in recent years. Statement of Problem. The present procedures developed for estimating peak rates of runoff from small ungaged watersheds are still not satisfactory to many scientists as well as designers. The reason for these new studies in hydrology is to develop better methods which will enable engineers working in water resources development to make reliable estimates of the magnitude and frequency of flood flows. Project Objectives. The objective of this project is twofold: first, to justify Potter's use of upper and lower frequency curve which represent two different populations of peak rates of runoff; and second, to verify findings of the pilot cross-section study that a relation exists between the magnitude of the ten-year peak rate of runoff and some characteristics of the stream cross section. Scope of Work. The project will cover the eastern and middle parts of the United States. In this paper are the results of the first phase covering that portion of the country between the Atlantic Coast and 97th meridian.
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