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    <copyright>Copyright © 2026. National Academy of Sciences. All rights reserved.</copyright>
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    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
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      <title>THE WORTH OF DATA IN HYDROLOGIC DESIGN</title>
      <link>https://trid.trb.org/View/54013</link>
      <description><![CDATA[Reviews of current methodologies for the determination of the worth of hydrologic data indicate that each method has certain shortcomings.  The simulation approach requires information concerning the statistical properties of the data that are not usually known.  The Bayesian Approach often leads to mathematically intractable relations.  The two approaches may be combined by defiing the data worth through simulation under the condition of assumed statistical properties and releasing the conditioning by making use of the prior distributions of the unknown statistics obtained from the Bayesian approach.  This combined approach circumvents the problems encountered when either the Bayesian or the simulation approach is used exclusively.  An example illustrates the use of the combined approach in evaluation of the worth of flood data in the design of highway crossings.]]></description>
      <pubDate>Tue, 20 Sep 1977 00:00:00 GMT</pubDate>
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      <title>RESISTANCE TO FLOW IN ALLUVIAL CHANNELS</title>
      <link>https://trid.trb.org/View/39563</link>
      <description><![CDATA[A direct method of predicting flow resistance and uniform velocity in alluvial channels is developed.  The method covers all known bed-form regimes and not only eliminates trial-and-error computations and use of rigid-boundary channel flow formulas but also avoids the difficulties associated with the use of the various existing alluvial channel flow computation techniques.  The study shows that the Darcy-Weisbach friction factor can be expressed as a unique function of the ratio of the bed form and grain shear stress components for any anticipated discharge and flow geometry, the bed-form shear component being uniquely determinable from the flow and channel material characteristics.  The results confirm that the friction factor is nonconstant but varies with the bed-form regime. The applicability of the method to laboratory flumes, field canals, and natural rivers is illustrated.]]></description>
      <pubDate>Sat, 18 Oct 1975 00:00:00 GMT</pubDate>
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      <title>BED FORM RESPONSE TO NONSTEADY FLOWS</title>
      <link>https://trid.trb.org/View/39008</link>
      <description><![CDATA[The rate of response of bed forms and the coexistent bar roughness of a sand bed in a laboratory flume to changing hydraulic conditions was studied.  Sophisticated electronic feedback control equipment was used to operate the flume such that the energy slope was maintained constant and the depth allowed to vary as a function of the bar roughness.  The results indicate the importance of the bed load transport in generating and modifying bed forms.]]></description>
      <pubDate>Wed, 02 Jul 1975 00:00:00 GMT</pubDate>
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      <title>TRACER STUDIES OF SEDIMENT TRANSPORT PROCESSES</title>
      <link>https://trid.trb.org/View/103993</link>
      <description><![CDATA[PARTICLES OF VARIOUS DIAMETERS AND SPECIFIC GRAVITIES WERE COATED WITH FLUORESCENT DYES AND USED AS TRACERS TO STUDY THE TRANSPORT AND DISPERSION OF SANDSIZE PARTICLES FOR THE FLAT-BED CONDITION IN THE RIO GRANDE CONVEYANCE CHANNEL AND FOR A DUNE-BED CONDITION IN THE ATRISCO FEEDER CANAL, N.M. PARTICLE VELOCITIES FOR THE DUNE BED DEPENDED ON SIZE BUT WERE ONLY WEAKLY DEPENDENT ON SPECIFIC GRAVITY. PARTICLE VELOCITIES FOR THE FLAT BED DEPENDED ON SIZE AND SPECIFIC GRAVITY, AND WERE SEVERAL ORDERS OF MAGNITUDE GREATER THAN THE PARTICLE VELOCITIES FOR THE DUNE BED. LATERAL MIXING OF THE TRACERS FROM A POINT SOURCE WAS CONSIDERABLE GREATER FOR THE DUNE BED THAN FOR THE FLAT BED. VERTICAL MIXING OF THE TRACERS FOR THE FALT BED WAS LIMITED TO THE THIN LAYER OF MATERIAL MOVING NEAR THE BED SURFACE, WITH ESSENTIALLY NO PENETRATION INTO THE BED. VERTICAL MIXING FOR THE DUNE BED OCCURRED TO A DEPTH APPROXIMATELY EQUAL TO THE HEIGHTS OF THE DUNES. /AUTHOR/]]></description>
      <pubDate>Mon, 25 Oct 1971 00:00:00 GMT</pubDate>
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